基于滑模控制的活塞式压力模拟装置位置伺服系统设计

Design of Piston-type Pressure Simulator's Positioning Servo System Based on Sliding Mode Control

为解决活塞式压力模拟装置位置伺服系统速度可控、位置接近段运动平稳的问题,选用滑模变结构控制设计永磁同步电机位置伺服系统。分析现有变结构伺服系统中位置速度一体化控制设计的思想和方法,提出一种简化的滑模控制器设计方法,该方法通过滑模面状态量的简单切换,就可以实现速度控制和位置定位,具有结构简单、实现方便的特点。仿真结果验证了该滑模控制器设计方法的正确性,最后通过实验平台进行压力模拟实验,实验结果表明该滑模控制的位置伺服系统设计可行有效。

In order to help piston-type pressure simulator＇s positioning servo system solve the problem of controUable speed, smooth motion of location approach phase, Sliding Mode Control （SMC） is chosen to design the positioning servo system of permanent magnet synchronous motor （PMSM）. A simplified approach was pproposed to design a SMC by analyzing the thoughts and methods of integrated design of position and speed control during existing variable structure servo systems. This approach could achieve speed con- trol and positioning only by switching states of the sliding surface, with characteristics of easy to come true and simple structure. Simu- lation result verified the correctness of this approach. At last, experimental results show effectiveness and feasibility of design of SMC positioning servo system by pressure simulation experiment in the platform.