Advanced position control design based on linear theory for Permanent Magnet Synchronous motor drive systems

This paper proposes an advanced position control method for Permanent Magnet Synchronous Motor (PMSM). It has good position control performance, including fast transient response and good tracking response with less static error. This design method is a kind of special reset control which was named as Optimal Reset Control (ORC). Due to its linear design principle, the ORC is relatively easy. On the other hand, ORC is a kind of nonlinear control scheme which can achieve some specifications beyond the ability of linear controller and realize much better sensor noise suppression without degrading disturbance rejection or losing margins. In order to eliminate the uncertainties of PMSM caused by parametric variations and external load torque disturbances, a linear two pieces cascaded coupled uncertainties observer is employed in the position control for feed-forward compensations. Since the observer can easily be ensured convergent by the design, the whole system stability is guaranteed according to the ORC design principle. Simulation results are shown to validate the effectiveness of the proposed position control scheme. And the comparisons and analysis between a high performance Sliding Mode Control (SMC) and it will also be given in this paper.