永磁直线电机自适应区间二型模糊滑模控制

针对永磁直线同步电机伺服系统受到系统参数变化、负载扰动而降低其性能的问题,考虑端部效应以及摩擦力的存在,提出一种自适应区间二型模糊滑模控制方法.采用自适应区间二型模糊系统逼近滑模控制等效控制部分,把传统的一型模糊系统扩展到区间二型模糊系统,提高系统面临参数变化、不确定性扰动时的处理能力.基于Lyapunov函数设计切换项增益调整的自适应律,保证系统的稳定性.仿真结果表明,该方法提高了系统的鲁棒性,有效地削弱了系统的抖振.

Adaptive interval type-2 fuzzy sliding mode control for permanent magnet linear motor

Aiming at the problem that the performance of permanent magnet linear synchronous motor servo system is weakened due to the parameter variation and load disturbance of the system, an adaptive interval type-2 fuzzy sliding mode control method, where the end effect and the existence of friction were taken into consideration, was proposed. An adaptive interval type-2 logic system was adopted to approximate the equivalent control part of sliding mode control, and thus, the traditional type-1 fuzzy logic system was extended to the interval type-2 fuzzy logic system. In addition, the processing ability of the system was improved when the system was confronted with the parameter variation and uncertain disturbance. Based on the Lyapunov function, the adaptive law of switch item gain adjustment was designed to guarantee the stability of the system. The simulated results indicate that the proposed method can improve the robustness of the system and effectively weaken the chattering of the system.