针对表贴式永磁同步电机滑模控制系统中存在抖振、响应速度慢的问题，采用一种新型滑模控制器与改进型滑模观测器相结合的控制策略。提出一种新型趋近律，选用tanh函数作为开关函数，使得切换更加平滑。再引入终端吸引子，提高系统收敛速度，改善系统控制品质。设计改进型滑模观测器，将符号函数替换为连续函数，并对观测误差进行补偿，削弱抖振并且提高观测精度。建立基于新型滑模控制器和改进型滑模观测器的双闭环速度控制系统仿真模型，并与比例-积分（proportional-integral, PI）控制系统、基于指数趋近律的滑模控制系统做对比仿真实验。仿真结果表明：提出的控制策略可以有效地减弱抖振效应，增强系统的收敛性，并且能够更好地跟踪给定信号。

To address the issues of buffeting and slow response in the sliding mode control system of surface mounted permanent magnet synchronous motors, a control strategy combining a novel sliding mode controller with an improved sliding mode observer was proposed. A new approach law was introduced, utilizing the tanh function as the switching function to ensure smoother transitions. Furthermore, the incorporation of a terminal attractor was aimed at enhancing system convergence speed and improving control quality. An improved sliding mode observer was designed to replace the symbol function with a continuous function, compensating for observation errors, reducing buffeting effects, and enhancing observation accuracy. A simulation model of a double closed-loop speed control system based on the new sliding mode controller and improved sliding mode observer was established, and comparative simulation experiments were conducted with a proportional-integral control system and a sliding mode control system based on an exponential reaching law. The simulation results indicate that the proposed control strategy effectively reduces buffeting effects, improves system convergence, and enhances the ability to track desired signals.