基于时滞补偿的气动系统位置控制仿真

为解决气动系统在控制过程中出现的时滞性、非线性性和外部干扰等问题,提出了一种基于时滞补偿的模糊比例-积分-微分(proportion integration differentiation, PID)控制的策略。首先,分析气动系统的工作原理,建立气动系统的机理模型。其次,针对气动系统存在的时滞特性,在Smith预估器的结构中引入干扰观测器,并使用改进的Smith预估器来补偿系统的纯滞后环节。最后,为提高位置控制精度,设计了具有自整定能力的模糊PID控制器。仿真结果表明,改进的Smith预估器与模糊PID控制相结合的策略能够保证系统的稳定输出,提高系统的抗干扰能力和鲁棒性。

Simulation Study on Position Control of Pneumatic System Based on Time Delay Compensation

In order to solve the problems of time delay, nonlinearity and external interference in the control process of pneumatic system, a fuzzy PID control strategy based on time delay compensation is proposed. First, the working principle of the system is analyzed, and a model of the system is established. Then, in view of the delay of the pneumatic system, a disturbance observer is introduced into the structure of the Smith predictor. Use the improved Smith predictor to compensate the pure lag link. Finally, in order to improve the accuracy of position control, a fuzzy PID controller with self-tuning capability is designed. The simulation results show that the method can ensure the stable output of the system and improve the anti-interference ability and robustness of the system.