Hybrid terminal sliding mode observer design method for permanent magnet synchronous motor control system
ABSTRACT This paper proposes a hybrid terminal sliding mode observer based on the nonsingular terminal sliding mode and the high-order sliding mode for the rotor position and speed estimation in the permanent magnet synchronous motor control system. A nonsingular terminal sliding mode manifold is utilized to realize both fast convergence and better tracking precision. Meanwhile, a high-order sliding mode control law is designed to guarantee the stability of the observer and eliminate the chattering. Therefore, the smooth back electromotive force (EMF) signals can be obtained without a low pass filter. According to the back EMF equations, the rotor position and speed can be calculated. Simulation results show that, compared to the conventional sliding mode observer, the hybrid terminal sliding mode observer avoids the phase lag in the back EMF signals, and improves the estimation precision of the rotor position and speed.
- SourceAvailable from: Yong Feng
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- "In order to improve the performances of PMSM servo systems, such as the precision, response speed, and robustness, high-order terminal sliding-mode (TSM) control strategy is employed to control PMSM servo systems (Feng et al. 2002). The structure of the system is shown in Fig. 18.4 (Zheng et al. 2008). "
ABSTRACT: This chapter describes the sliding-mode control of permanent magnet synchronous motor (PMSM) servo systems. The typical structure of the systems consists of the position, velocity, and current control loops. The design of three controllers, position controller, speed controller, and current controller, and a filter in speed loop has been described respectively, aimed at reaching high-performances of PMSM servo systems, such as fast response, strong robustness, and high precision. The digitization of terminal sliding-mode (TSM) controllers of PMSM servo system has been discussed for the purpose of practical implementation.AC Electric Motors Control, 04/2013: pages 381-397; , ISBN: 9781118331521
05/2011; 6(5):819-825. DOI:10.4304/jsw.6.5.819-825
- "It features good robustness, disturbance rejection, and fast response control. Sliding mode control has been widely used in the SPMSM control design   . "
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ABSTRACT: In this paper, we develop a fuzzy sliding mode technique to control the field-oriented synchronous machine and to estimate the motor speed. The sliding mode controller (SMC) is designed for a class of non linear dynamic systems to tackle the problems with model uncertainties, parameter fluctuations and external disturbances. In SMC, the high frequency chattering phenomenon results from the discontinuous term in traditional sliding mode control is highly undesirable. In this paper we use the fuzzy logic to reduce the chattering phenomena. The system stability analysis is carried out using Lyapunov stability theorem. An asymptotically stable observer is designed to overcome the problem of speed sensor and is obtained without affecting the overall system response. The simulation results show the effectiveness of the proposed control strategy with desired tracking accuracy and robustness.