舰用恒压供水装置模糊PID控制器设计及仿真

Fuzzy PID Controller Design and Simulation of Constant-Pressure Water Supply Instrument for Warship

舰用恒压供水装置可根据用水量自动变频及平滑加减泵,从而实现恒压供水。由于系统具有非线性、时滞性和时变性,建模和控制具有一定难度。传统的PID控制算法在应用中易引起响应速度慢、水泵在工作模式切换临界点附近反复启停等问题,控制效果较差。为解决上述问题,提出利用最小二乘系统辨识法,建立了某型舰用恒压供水装置系统模型,设计了模糊自整定PID控制器,并进行了仿真分析。仿真结果表明,上述设计的舰用恒压供水装置模糊自整定PID控制器控制效果较单纯PID控制具有适应性强、响应速度快、超调量小等优点。

Warship constant - pressure water supply instrument can keep the water pressure constant by automati- cally changing frequency of the pump smoothly according to the rate of flow. The characteristics of nonlinearity, hys- teresis and variability of the system bring difficulties to system modeling and control. The problems such as slow re- sponse and frequently starting and stopping the motor when working at some special working points existing in tradi- tional P1D control,which lead to poor control quality. The model of some type of warship constant - pressure water supply instrument was established in this paper based on least square system identification method. Also, a fuzzy self - adaptive PID controller was designed and simulation research was conducted in the paper. The simulation results show that the controller has faster accommodation time and lower overshoot.