Table of contents

It is our great pleasure to welcome you to the 2nd International Conference on Mechanical Manufacturing and Industrial Engineering (MMIE2019) held in Beijing, China during December 14-16, 2019 with the workshop, 2019 The 2nd International Conference on Advanced Composite Materials (ICACM 2019). The conference is dedicated to issue related to the areas of advanced composite materials, mechanical manufacturing and industrial engineering.

Prof. Alan Lau from Swinburne University of Technology, Australia, Prof. Yong Suk Yang from Pusan National University, Korea, Prof. Lihui Lang from Beihang University, China and Prof. Tingkai Zhao from Northwestern Polytechnical University, China were invited to deliver keynote speeches and provide latest findings in their respective areas of expertise. It was a golden opportunity for the students, researchers and engineers to interact with the experts and specialists to get their advice or consultation.

Due to the constraint of the capacity and suitability of the topics, 34 papers were accepted as full papers for publication and presentation from 75 submissions. We would like to express our gratitude and appreciation to the authors for your contributions. Many thanks go as well to all of the reviewers who helped us maintain the high quality of manuscripts included in the Proceedings published by IOP Conference Series: Materials Science and Engineering. We also express our sincere thanks to the members of the organizing team for their hard work. We wish that all the authors and delegates find MMIE2019 interesting, exciting and inspiring. We also wish that our guests will enjoy your stay in Beijing, China at this beautiful time of the year.

List of Conference Committee Chairs, Program Committee Chair, International Technical Committees are available in this pdf.

All papers published in this volume of IOP Conference Series: Materials Science and Engineering have been peer reviewed through processes administered by the proceedings Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.

The effects of different refractory nitrides: aluminium nitride (AlN), titanium nitride (TiN) and hexagonal boron nitride (h-BN) reinforcements on the microstructure, densification and microhardness characteristics of spark plasma sintered Ti6Al4V-based binary composites were studied. The microstructure was examined by optical microscopy, densification was evaluated according to the method of Archimedes and the microhardness of the sintered composites was measured by Vickers microhardness tester. The SPS technique was successfully used to consolidate Ti6Al4V powder and 3 wt.% nanoparticles of AlN, TiN and h-BN respectively. The binary composites produced attained nearly full theoretical densification (98.22 to 99.54%) due to enough diffusional mass transport ensuing in solidly bonded compact of the matrix and the refractory nitride reinforcements. Ti6Al4V-3h-BN composite gave the optimal combination of relative densification and microhardness values of 99.54% and 7.03 GPa which exceeds 200% that of the monolithic alloy and about 48% superior to both composites with TiN and AlN reinforcements.

Fiber reinforced metal laminated tube (FMLT) is a kind of multi-layer super-hybrid material which is cured at a fixed pressure and temperature after alternately laying metal laminated tube and fiber composite material. The development of GLARE composite pipe hydroforming technology and performance testing is of great significance to the development of aviation industry and automotive industry in terms of lightweight and safety.

The use of fiber-reinforced polymer (FRP) plates for the strengthening of structural members involves their exposure to service temperature variations (i.e., thermal loadings). Such temperature variations may lead to thermal stress and the interfacial debonding of the FRP-plated beam as a result of the thermal mismatch between the FRP plate and the substrate beam. There is lacking research related to the effect of temperature variations on the interfacial debonding of FRP-plated beams. This paper presents the first-ever analytical study on the behavior of the FRP-plated beam under combined thermal and mechanical loadings. The interfacial stress and slip evolutions as well as the debonding process of the FRP-plated beam are estimated based on a coupled mix-mode cohesive zone modeling. In addition, a finite element (FE) approach is proposed to verify the analytical solution in which the analytical results are compared with the FE model predictions, indicating that a good agreement was achieved between the analytical and FE results.

At present, the high-speed train mainly made up of carbon fiber composites adopts a new flame-retardant multi-material system. It is necessary to select adhesives for the Adhesive bonding structures of different materials in order to meet the overall technical and performance requirements of high-speed trains. Through this research, mechanical performance data of several structural adhesives and sealant adhesives are obtained when they are bonded to the high-speed trains with carbon fiber composite material as the main body. Finally, the optimum adhesives for bonding different material systems in the high-speed trains are determined under different operational aging environments, which also provides data support for the formulation of connection specifications for carbon fiber reinforced composites in the field of high-speed railway. In addition, a multi-dimensional data reduction method is proposed for the analysis of sealant performance data, which is very helpful for the future analysis of big data of adhesives.

Natural pozzolana and limestone ternary blended concrete is a new type of limestone calcined clay cement (LC3) concrete. Natural pozzolana and limestone can benefit each other and contribute to the performance improvement of concrete. Flexural strength is an important engineering property of concrete. This study predicts the development of flexural strength of ternary blended concrete using machine learning based models, such as artificial neural networks (ANN) and gene expression programming (GEP). Concrete mixtures and curing ages are used as input parameters of ANN and GEP. Flexural strength is output parameter of ANN and GEP. The correlation coefficients of GEP and ANN model are 0.98 and 0.99, respectively. GEP and ANN can make reliable evaluations of flexural strengths of ternary blended concrete.

Based on the method of fluid volume function, the two-phase flow model of mesoscopic resin and air between unit cell fiber bundles was established. The causes of mesoscopic bubble defects were discussed and the controllable process parameters were analyzed. A near-real mono-cell mesoscopic geometry model of strut insulator was constructed and meshed. The solution of the resin and air two-phase flow model was completed by adopting the finite volume method and using the Fluent software. The numerical simulation of the mesoscopic resin air two-phase flow and the air bubble defect was applied. The relationship between process parameters and air bubble defect was studied, and process parameters were optimized. Through the contrastive analysis of the capillary number, the correctness of the numerical simulation and parameter optimization was theoretically verified. Further, the effectiveness of the method in this paper was verified through the experiment.

This study focus on the tensile strength of angle-ply composite laminate scarf joints and corresponding finite element modelling (FEM) methods. Tensile tests are performed at 25°C and 75°C on scarf joint specimens with unidirectional laminate stacking sequences. The joint tensile strength result values at 75°C represent around 86% of those obtained at 25°C. The tensile test is simulated with finite element modelling including cohesive elements to model failure. The joint adhesive film is represented either with only full thickness cohesive elements, or with thin or zero-thickness cohesive elements combined with solid elements having a plastic adhesive material model. Simulations results show that in the case of a unidirectional laminate, the adhesive modelling method had less than 1% effect on the simulated tensile failure strength. For quasi-isotropic laminates with a given ply angle count but of varying ply order, the simulated tensile failure strength varies up to 15%, which confirms tendencies reported in the literature.

Diamond-like carbon (DLC) film was prepared by magnetron sputtering method on glass substrate. The microstructure, transmittance, and wear resistance of the diamond-like carbon film were investigated and analyzed. This study clearly showed the significance of sputtering power, Ar pressure and substrate temperature in controlling the transmittance and wear resistance of DLC film. The sp3 bond in the film had a greater impact on the transmittance and wear resistance of DLC film. The optimized deposition parameters obtained through experiments were: Ar pressure of 0.7 Pa, sputtering power of 100 W, and substrate temperature of 150 °C.

In this paper, a series of Li₂Mg_3-xSr_xTiO₆ (x = 0, 0.02, 0.04, 0.06, 0.08) ceramics were prepared by the conventional solid-state reaction method. The effects of Sr²⁺ substitution on the structure, morphology and microwave dielectric properties of Li₂Mg₃TiO₆ ceramics were investigated. The X-ray diffraction (XRD) results indicated that Li₂Mg₃TiO₆ and SrTiO₃ phases stably coexisted with each other and formed composite materilas. The appearance of porous structure mainly originated from the volatilization of lithium at high sintering temperatures. As the Sr²⁺ content increased from 0 to 0.08, the optimum dielectric constant (ε_r) increased from 13.61 to 17.32, the quality factor (Q×f) decreased monotonously and the temperature coefficient of resonant frequency (τ_f) changed from -34.4 to +16.8 ppm/°C. The variations of ε_r, Q×f and τ_f could be explained by the Lichtenecker logarithmic model and mixing rule, respectively. In particular, optimal microwave dielectric properties of ε_r = 16.08, Q×f = 82100 GHz, τ_f = +1.7 ppm/°C were obtained for Li₂Mg_2.94Sr_0.06TiO₆ ceramic sintered at 1310 °C for 5h.

Composite structures have played a significant role in enhancing airplane's performance However, defects inside can be a potential threat to flight safety. To resolve the hazard. FMECA was applied to the defect analysis of composite structures on airplane's wing. And the failure mode of the highest criticality was found to be the impact damage. Then impact test on typical composite laminates was carried out. The caused damage was qualitatively analysed and proved impact of low energy brings latent risk. Practical solution was put forward to improve the safety or reliability of the applied composites in the airplane.

Rockwell hardness is the most widely used hardness measurement method in industry at present. Taking superficial Rockwell primary standard machine in National Institute of Metrology(China) as an example, the uncertainty caused by the radius of the indenter arc accounts for 50% of the total uncertainty. In view of the important influence of the arc radius at the top of Rockwell diamond indenter on the evaluation of Rockwell hardness uncertainty, a profile projection system is established which is composed of lens, industrial camera and area-source of light. After pictures are obtained with camera, the next task for these pictures is to be calculated to get target parameter. The target parameter is obtained by profile extraction and radius calculation. In this paper, a new method is proposed as an algorithm criterion that sum of absolute value of data points and fitting arcs is used. Simplicity algorithm is introduced to iteratively solve the algorithm criterion. The purpose of using the algorithm is to eliminate the influence of outlier noise points. To verify the validity of the method in this paper, we conduct a series of experiments. The traceability experiment with standard sphere shows that the expanded uncertainty of the system of the instrument can achieve1.0µm,k=2.The uncertainty of measurement result with Rockwell diamond is1.5µm,k=2. The method in this paper bases on a simple-structural system, has high measurement accuracy, and can be used for rapid screening, evaluation, verification and calibration of Rockwell diamond indenters in industry.

Molecular dynamics simulations are performed to investigate the effect of temperature on the plastic deformation mechanism in aluminum single crystal. It is found that as temperature increases the Yield strength and Young's modulus of the aluminum under compressive and tensile strain will reduce. Moreover, it is found that the higher temperature is, the easier the dislocation emission is. Under compressive strain, the proportion of 1/6<112> Shockley type of dislocations to total dislocations is found to increase with the temperature increasing. It is also found that only a large amount of dislocation occurring incipiently the strength of the material can be yield.

Fracture is one of the most common failure of engineering structure and the stress intensity factor is the key parameter used to decide whether the structure will crack or not. This essay is based on the concept of conservation law and the tension theory in mechanics of material. It analyzes the stress intensity factor of circumferential periodic cracks on tube with stiffened plates, it obtains the specific expression of stress intensity factor of circumferential periodic cracks on tube with stiffened plates under tension. Finite element method is used for checking the stress intensity factor of cracks and proving the accuracy of expression's results. The method which proposed in this essay is easy to calculate and can get the closed solution.

To realize on-line multiaxial fatigue damage evaluation for the servicing mechanical components, a real-time multiaxial cycle counting method is proposed, meanwhile, an online multiaxial fatigue damage evaluation method based strain-critical plane model is given and validated by the fatigue experimental data of En15r steel. Investigation showed that the proposed on-line multiaxial fatigue damage evaluation method could provide satisfactory evaluation results, and the real-time performance of the proposed cycle counting method is path-dependent.

During the service of pressure vessel, there are many kinds of structural damage. The main defect is pitting caused by corrosion of loaded materials, cracks are formed because of stress concentration in the pit position, and crack propagation leads to crack leakage. As an important parameter to characterize cracks, fatigue life is widely used in engineering to judge the safety and reliability of mechanical structures. In this paper, based on the two-parameter pit-crack model, the fatigue life of pressure vessel with multiple pits-cracks is discussed by using ANSYS finite element analysis software. The results show that the fatigue life of pressure vessels decreases with the existence of multiple pits and cracks, but with the increase of pit-crack spacing, the effect decreases gradually until it returns to a stable state. The effect of pit parameters and the ratio of crack length to depth on fatigue life has obvious interval effect. This paper can be used as a reference for failure assessment of multi-pit-crack pressure vessels.

Multi-free-surface mirror integrated system is the development trend of optical system, but its ultra-precision machining is very difficult, this paper mainly studies the tool path generation problem of multi-free-surface reflector integrated system. In this paper, two tool path generation methods for the off-axis four-mirror group machining with SPDT are presented, one tool path generation method is separate machining and the other is integrated machining. Both methods are based on cylindrical spiral and generate tool path by projecting points onto surfaces. For the tool path generation method of integrated machining, the linear transition is used to realize the smooth transition of the mirror surfaces. By comparing the simulation machining of two kinds of tool path generating methods, it is found that the integrated tool path generating method is more suitable for off-axis four-mirror group machining and has higher machining efficiency.

With the development of industry, the elliptic-sectional tube is widely used in some special situation. In this paper, a theoretical model is developed to calculate the additional bending moment of thick-walled elliptical tube under the internal pressure, based on the structural static force method. The effects of internal pressure and ellipticity on the additional moment were discussed. At last, finite element analyses were conducted and the results were compared with the theoretical results to verify the correctness of this theoretical model. This model can provide a guideline for determining the maximum additional bending moment of elliptic, and help in estimating the failure of the elliptical tube under the internal pressure.

Surface roughness is an important factor to consider in the field of precision manufacturing. In this study, a model of the surface roughness in inner thread grinding that takes into account the thread helix angle and effect of elastic deflection between the wheel and the workpiece is presented. The surface roughness is analyzed under different spindle speeds, workpiece speeds, grinding depths, and thread helix angles. The proposed model provides a theoretical basis for the optimization of high-precision inner thread grinding.

Knotter mouth is the key part of the knotting on the knotter. Under the action of variable amplitude cyclic load, such as extrusion, shear, torsion and so on, the surface wear of knotter pliers and the fracture of clamp hooks are easy to occur. It takes a long time to disassemble and assemble the knotter mouth, which seriously affects the field operation efficiency of the square baler. In view of the present situation that the knotter mouth of D-type knotter is easy to fail and difficult to replace, on the premise of not affecting the normal knotting function of the knotter, the detachable knotter mouth is designed and completed by reasonably designing the thread structure and rotation direction of the knotter mouth. The disassembly and assembly time is significantly reduced, which is beneficial to the continuous operation of the square baler. ANSYS simulation analysis shows that, compared with the original knotter mouth, the maximum equivalent stress and maximum equivalent strain of the detachable knotter mouth are increased by less than 3%, and the maximum impact fatigue life of the detachable knotter mouth is 60 000 times. The fatigue life of the knotter mouth is much lower than that of the original knotter mouth, but it can still meet the rated life requirements of 40, 000 knotting times of the knotter. The research content makes full use of the safety margin of the knotter mouth structure, which has reference value for facilitating the maintenance and replacement of the knotter mouth and improving the operation efficiency of the whole machine.

The outer gear of knotter cam gear of D-knotter and pinion of knotter hook to achieve coordination and cooperation is important guarantee for the movement of "winding rope - biting rope". This paper analyzes the damage mechanism of the outer gear of knotter cam gear. By application the probability theory for equal effect accuracy synthesis, the outer gear of knotter cam gear and pinion of knotter hook selected from 8 grade precision, and modification of teeth top along the normal direction of the measurement of 50.04 μm for pinion of knotter hook, can control the additional impact dynamic load less than 0.085 times of the calculated load. Two methods of traditional fatigue strength calculation and finite element analysis are used to check the strength of the incomplete outer teeth. And the results obtained by the finite element simulation described in this paper are closer to the real value. This study is of practical value in improving the reliability of the knotter cam gear and promoting the localization of D-knotter.

The stress state of the car wheel is one of the guiding design indicators for the wheel structure. This paper uses the combination of finite element method and bench test to study the stress state of the wheel when driving straight. Through the finite element simulation of bending fatigue and radial fatigue, the position of dangerous points during the use of the wheel is obtained. The location of the dangerous point is used as the strain measuring point, and the test bench is built. The strain gauge is used to measure the strain of these points in the straight running condition, and the test results are analyzed. The results show that when the vehicle is traveling straight, the tire will have a greater impact on the load of the wheel. The squeezing deformation between the tire and the wheel, as well as the positive and negative rotation, will have an effect on the stress state of the wheel. The maximum strain of the wheel appears on the inside of the wheel rim, the rim is in contact with the tire and along the circumference of the wheel. The strain near the center of the wheel is small. Different loads have no effect on the variation of wheel strain, but have an effect on the maximum and minimum peaks.

Capacity planning, which is integral to resource selection and allocation, is an important task in manufacturing system design. As budget is limited, investment in resources must be done carefully and appropriately in order to achieve desired capacity and system efficiency. One of the most expensive and valuable resources in the manufacturing system is machinery. Therefore, selecting an appropriate machine is of high significance. Among many types of manufacturing systems, intermittent manufacturing system is complex, yet flexible. The intermittent manufacturing system enables manufacturers to produce multiple products using multiple processes and multiple machines. The system comprises a network of multiple types of multi-process machines. A machine selection problem in the context of the intermittent manufacturing system is a delicate process, as it must correspond appropriately with production complexities. To alleviate this problem, we develop a decision support system for solving the machine selection problem in an intermittent manufacturing system design. We study several manufacturing systems producing multiple types of products with various multi-process machines to lay out the framework. This decision support system consists of four main parts, namely; data entry, data conversion, optimization model and report. To solve the machine selection problem, an optimization technique is used to identify the optimal number of machines and the allocation of production process of each machine. The objective of this optimization problem is to minimize total production costs (machine cost and operating cost) while maintaining production capacity and other production constraints. The decision support system is developed for and validated with the manufacturing company.

As an important component of gas turbine, air inlet filtration system is of great significance for ensuring the normal operation of gas turbine. However, it is often difficult to select a suitable air inlet filtration system according to the operating characteristics of the unit and the external environment due to the large number of variables. From the perspective of life cycle cost, the main factors to be considered in the selection of inlet filtration system are discussed, and the corresponding calculation model is proposed. Through the cost calculation of a gas-steam combined cycle unit's inlet filtration system during the whole life cycle, the influence of the initial cost, operation cost, maintenance cost and gas turbine performance degradation cost on the total cost is analyzed. The results show that the cost of gas turbine performance degradation accounts for 90.44%, and the initial cost only accounts for 0.62% in the total cost. Therefore, in the selection of the inlet filtration system, the system economy should be evaluated from the perspective of full life cycle cost. The calculation model has important guiding significance for the selection and cost calculation of the gas turbine inlet filtration system.

Three dimension measurement based on fringe projection technology is widely used in precision manufacturing. However, when measuring objects with reflective surfaces, the measurement accuracy is reduced due to image saturation. This paper presents a projection intensity adjustment method based on multi-threshold. The reflectivity information of fringe pixels and scale factor are used to calculate the multi- threshold. According to the multi-threshold, the optimal projection intensities are obtained, which reduces the image saturation and improves the measurement accuracy. The experimental results show that this method can improve the measurement accuracy effectively.

Electric Tilting Tricycle is a three-wheeled vehicle that has tadpole configuration driven by two sources of motion, that motion by a manual pedal and power from an electric motor. The three-wheeled vehicle has better stability and the tilting system improves ergonomics at curves. This research aims to design and analyze the strengths frame with three different materials using the Autodesk inventor software. By using the Stress Analysis feature that comes with the method of finite element analysis (FEA), we can know the result of von misses stress, displacement, strain, and safety factor. The main consideration of structural strength was seen from the distribution of static loads using three types of materials (Aluminium 6061, Steel Mild and CFRP). The minimum factor of safety resulting from the design simulation was estimated to be 1.83 using steel mild material.

Most assembly lines use a bottom-up mechanical system design approach. In view of the problems of poor system interchangeability and low product versatility, a battery assembly line was designed based on the modular design method. The linear modules, cylinders and linear guides were used as the basic elements to build the production line modules. Different assembly requirements have improved the performance of the entire production line. The discrete-event system simulation method is used to simulate the quasi-running process of the production line, analyze the bottleneck of the production line, and improve the production efficiency of each module of the production line by changing the optimization method of the loading link and the production sequencing.

The environment for newborn babies is harsh, and it is often difficult for parents to understand whether the baby's current environment is comfortable. Taking care of babies is the most troublesome thing for young parents. In order to let parents know more about the environmental changes around the crib, when the environment changes greatly, timely treatment, such as the temperature difference between day and night when the seasons are alternating, it is difficult for parents to grasp whether the current temperature of the crib is comfortable, and the baby often has a fever due to sudden changes in temperature at night. Through the use of various sensors to collect the surrounding environment of the crib, real-time monitoring of the temperature, moderate, gas and other environmental data around the crib, through the infrared temperature measurement module to measure the baby's body temperature in real time, while adding music playback, shaking comfort, baby crying detection By uploading data to the cloud through the Internet of Things Internet of Things, parents can easily view the real-time status of the baby's growing environment, providing a healthy, scientific, and comfortable environment for babies while reducing the burden on busy parents.

Reliability growth test is a common method to evaluate complex electromechanical systems in mechanical engineering. Reliability growth models are usually used to predict the reliability index of systems after the reliability test. AMSAA (army materials systems analysis activity) projection-model-stein (APMS) model is widely used for delayed corrective strategy, since it only requires limited assumptions but covers all failure data. However, there is a controversy about whether the Stein factor introduced in this model is reasonable. To alleviate the problem, an APMS development model is presented in this paper, because different types of parts have different inherent failure mechanisms. The study showed the projection results of the proposed model are credible. Moreover the Stein shrinkage factors were more reasonable and acceptable, as they were derived from the components with similar inherent failure mechanisms. These provide a technical foundation for the wide application of the proposed model.

In order to solve the steady-state error in position tracking control for electro-hydraulic servo universal testing machine, caused by uncertain parameters in the system model, an adaptive sliding mode control strategy based on RBF neural network is proposed for this situation. This paper utilizes the adaptive ability of RBF neural network to improve the control quality of the electro-hydraulic position servo system. The strategy has three parts: the equivalent control, the reaching law control and the compensation control based on RBF network. Simulations verify that the control system can track the reference curve well with unknown parameters.

Harmonic reducer is the core part of robot joint, its tooth shape design theory and meshing characteristics will directly affect the motion control accuracy and vibration characteristics of robot. This paper studies the meshing process of the circular spline and flexsplines of the harmonic reducer based on the double arc profile and the elliptical wave generator. The main innovation of this research is to take the input angle of the wave generator as an independent variable, which more clearly represents the enveloping process and meshing interval distribution of the tooth profile. The results show that the secondary meshing process of the double circular arc tooth profile exists on both sides of the long axis of the wave generator. But the second conjugate contact interval is small, so the optimization of tooth shape should focus on the first conjugate interval. This study provides a theoretical basis for the design of tooth profile parameters of harmonic reducer.

Selection of supplier can be considered as the significant strategic decision for company's competitive advantage. Generally, the scales of criteria for selection were used to evaluate the performance of suppliers. But the traditional criteria are limited to reflect the comprehensive ability of the suppliers. Meanwhile, the quantitative scale, which is used to evaluate the suppliers, is too subjective to describe the real station of suppliers. Therefore, the improved analytic hierarchy process (AHP) is conducted to reanalyze the criteria and distribute the weight for each criterion. Technical for order preference by similarity to ideal solution (TOPSIS) used to calculate the relative proximity for each supplier and rank them based on the corresponding information. Finally, the calculate process is programmed by Excel VBA and MATLAB respectively. The two results show the same ranking order, which verify the improved AHP-TOPSIS method can effectively guide company to select supplier.

Due to the fact that financial institution has its limited competency in developing the information system, outsourcing is often used to support the information system development which same as the case study of the issuing documents system in financial institute. The financial institution has received customer's complaints regarding the mistake of issuing documents caused by the system functionality and human error in operations. Thus, the purpose of this study is to design framework of user requirement and usability testing for information system development to prevent the error in system functionality and set some quality checking process of documents before delivery to customer to prevent mistakes from human error in work operation. System Usability Scale showed that after proposed the framework of user requirement and usability testing to employees who related with the system development, their level of satisfaction toward the framework and non-framework of user requirement and usability testing raise up to 30.93% and 20%, respectively. After six months of implemented quality checking process of documents revealed zero complaints from customers regarding to the mistake of issuing documents.

This paper presented an approach of Digital Image Processing (DIP) and measurement properties of image region for inspecting the part in Head Gimbal Assembly (HGA) process. Current, the inspection process is performed by the skilled employee, which depends on employee experiences. The inspection method proposed by using digital image processing to do an image enhancement in order to detect the abnormalities and defects on part. The measurement properties of image region is proposed to identify the abnormality occurred on HGA part after image enhancement, in production process. This research aimed to develop the algorithm to inspected HGA part by considered the number of pads, convex area value, and eccentricity value. Then used measurement properties of image region to enhance the algorithm for classifying part in production process. This approach has been developed and proved with the real part in HGA production process. It's proved that the algorithm and method proposed can be classified the part in HGA production process.

In order to improve the heating efficiency and control precision of electric heater, the method that applying the model predictive control algorithm to electric heating control was proposed. According to the analysis of electric heating characteristics, it was proposed that taking PID controller and the electric heater as the generalized object of the control to improve the dynamic response and the linearity. For realizing model predictive control, the system framework of this algorithm and the operating steps of controller were designed. The result of simulation and experiment proved this method effective and superior over the traditional control. Finally, the analysis on some parameters of controller provides a reference for others who interested in this study.