This paper analyses the Proportional-Integral-Derivative (PID) controller’s performance for quadruple tank process. The selection of controlling the flow ratios in quadruple tank process act as Minimum and Non-minimum phase system. Its performance

用matlab语言来简洁的实现在静态负载下符合最小化原理的拓扑优化。总共只需要输入99行代码，包括优化程序和有限元分析子程序。这99行代码中，其中36行为主程序，12行为基于最优控制器的优化程序，16行为敏度过滤分析，其余35行代码作为有限元分析。(MATLAB language is used to concisely implement topology optimization based on minimization principle under static load. A tot