基于自适应扰动和改进趋近律的永磁同步电机滑模调速系统

针对永磁同步电机突然加入负载时存在的转速波动和不稳定问题，提出一种基于自适应扰动和新型趋近律的滑模速度控制方法。在趋近律内引入系统状态变量，同时改进趋近律内的数学关系，从而提高系统趋近速度的自适应调节能力，达到提升系统综合性能的目的；利用李雅普诺夫稳定性判据进行反推，对负载转矩进行了自适应估计，使得文中控制策略满足李雅普诺夫稳定判据的同时，降低了外部负载对电机转速的影响。最后，在Simulink环境下将文中控制策略与传统滑模控制策略进行对比。仿真结果表明：采用文中控制方法的系统响应更快、抑制系统抖振的能力更强，此方法能够有效地提高系统的综合性能，实现更稳定的转速控制。

Permanent Magnet Synchronous Motor Speed Regulation System Based on Adaptive Disturbance Sliding Mode and Improved Reaching Law

Aiming at the problems of speed fluctuation and instability when permanent magnet synchronous motor is suddenly loaded,a sliding mode speed control method was proposed based on adaptive disturbance and novel reaching law.The state variables of the system were introduced into the reaching law,and the mathematical relation within the reaching law was improved at the same time,so as to improve the adaptive adjustment ability of the system approach speed and achieve the purpose of improving the comprehensive performance of the system.The load torque was estimated adaptively by using the Lyapunov stability criterion to make the control strategy meet the Lyapunov stability criterion,and reduce the influence of external load on the motor speed at the same time.Finally,the proposed control strategy was compared with the traditional sliding mode control strategy in the Simulink environment.The simulation results show that the proposed control method has faster response and stronger chattering suppression ability.The proposed method can effectively improve the overall performance of the system and achieve more stable speed control.