基于MATLAB/SIUMLINK的压力自动调节系统的研究

Research on pressure autocontrol system based on MATLAB/SIMULINK

试验产品进口压力的控制精度必须稳定、不振荡、不超调、连续可控,采用常规PID控制器的微分作用可以进行超前控制而减少控制系统的超调,提高控制系统的稳定性.但在实际中,对具有非线性、时变不确定等特性的系统控制常规微分作用往往不能发挥应有的作用.微分先行PID是理想型PID改进中的一种,它适合于给定值频繁变化的情况,将微分先行PID控制器运用于压力自动调节系统,并在仿真平台MATLAB的仿真环境SIMULINK下进行了仿真.仿真结果证实,微分先行PID控制器缩短了滞后时间,减小了超调量,其控制性能和动态特性均能获得较好的效果.

The test product inlet pressure control precision must be stable,no vibration,no overshoot,continuous control,and automatic pressure control system is targeted at a pipeline capacity is very small,rapid response,the lack of cushion.Using conventional PID controller Differential effect of advanced control can be reduced overshoot control system to improve the stability control system.But in practice,the nonlinear,time-varying uncertain system control features such as the role of routine often can not achieve the desired differential role.differential first ideal type PID is a PID improvements,it is suitable for a given value of the frequent changes in the situation,first PID controller used in the differential pressure automatic control system and simulation platform under MATLAB SIMULINK simulation environment the simulation.The simulation results confirm that differential forward PID controller reduces lag time,reduced overshoot,the control performance and dynamic characteristics can obtain better results.