滑模变结构控制在双闭环调速系统中的应用

Application of Sliding Mode Variable Structure Control in the Double Closed Loop Speed Regulation System

为提高双闭环调速系统的快速跟踪性能,提出了一种新的滑模变结构速度控制策略。为了有限抑制系统在滑模切换面上的抖振,提高系统鲁棒性,在建立无刷直流电动机模型的基础上,提出了一种新型指数趋近率的变结构控制策略,使切换函数快速进入滑模面,有效地减小了系统的抖动。仿真实验结果表明采用的改进指数趋近率的滑模变结构控制相比传统的PID控制,系统在快速性、稳定性、准确性得到显著提高,系统对参数扰动具有较强的鲁棒性。

A new slide mode variable structure speed control strategy is developed to improve the double closed loop speed control system.A new approach law variable structure control strategy is proposed in order to efficiently weaken the chattering on the sliding surface of the system and improve the robustness and performance based on the model of double closed loop speed control system.The simulation and experimental results validate that the new approach law variable structure control compared with the traditional PID control, the system has been significantly improved in speediness, stability, accuracy, and has strong robustness to parameter perturbation.