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在热力过程控制系统中,通过选择合适的非线性P I控制器,能使系统的动态性能得到显著改善。利用S im u link工具箱中的非线性设计模块(NCD模块)对4种P I控制器的参数进行优化,并基于M on te-C arlo实验原理计算和分析不同控制系统的性能鲁棒性。仿真结果表明:所选的4种控制器中,其中一种非线性P I控制器对4类典型热力过程控制系统的动态性能均有显著改善,系统输出几乎没有超调,调节时间明显缩短,过渡过程更加平稳,并且该控制器对被控对象参数变化有较好的性能鲁棒性。
In thermodynamic process control systems, the dynamic performance of the system can be significantly improved by choosing the appropriate nonlinear PI controller. The parameters of the four P I controllers were optimized using the Nonlinear Design Module (NCD module) in the Simulink toolbox, and the robustness of the different control systems was calculated and analyzed based on the M on te-C arlo experimental principle. The simulation results show that among the four controllers selected, one of the nonlinear PI controllers has a significant improvement on the dynamic performance of the four typical thermal process control systems with almost no overshoot of the system output, significantly shortened regulation time, The process is more stable, and the controller has better performance robustness to the change of the controlled object parameter.