Research on AC Power Conditioning Control Technology for Ultraprecision Machining of Steel Materials

This paper presents a nonlinear control technology controlled AC power conditioning with application to ultraprecision machining of steel materials. The presented technology associates the advantages of finite-time tracking control (FTTC) and cuckoo search algorithm (CSA). The FTTC allows insensitivity to system uncertainties as well as system states finite-time convergence. It is a remarkable fact that the chatter will occur in face of highly dynamic loads. The chatter causes high output-voltage distortion in AC power conditioning, and the ultraprecision machining of steel materials may be instability and unreliability. The CSA is thus used to attenuate the chatter so that the AC power conditioning can provide robust performance for ultraprecision machining of steel materials. Because the proposed control technology is easier to implement than prior technologies and achieves high tracking precision and low calculational-complexity algorithm, experiments display low total harmonic distortion and fast transience in the output voltage, and this paper will be helpful to researchers of related ultraprecision machining of steel materials.