控制系統的參數優化問題總要涉及到如何選擇目標函數的問題，其目的是使目標函數能比較確切地反映系統的特性，而且又能計算簡單。本文先將優化設計中的單純形尋優法和MATLAB 的優化控制工具箱有機地結合起來，選取基于“ISE 準則”的目標函數，經過大量的仿真試驗證明“ISE 準則”確實存在問題。最后利用最優控制理論推導和分析，提出了一種適用于控制系統參數尋優的新的目標函數，并說明了所給出的新的目標函數使得控制系統的時域性能指標（超調量和調節時間）都得到很大的改善。
關鍵詞：單純形法；目標函數；參數優化

Research on Object Function of Optimal Parameters for controllers HE Jinyuan 1 ZHOU Guopeng2,3 (1.Network Center of Xianning college, Xianning, Hubei, China , 437005; 2. Mathematic department of Xianning college, Xianning, Hubei, China , 437005; 3. College of Automation Science & Engineering , South China University of Technology, Guangzhou,
Guangdong , China, 510641) Abstract：The parameter optimization of control systems always refers to different object functions. The propose is that the selected object function should exactly reflect the characteristic of the control system, while making the computation easy. In this paper we combine simplex search of optimization technique and optimization toolbox in
Matlab confirm that "ISE" principle has some problems while using it as our object function. By the means of theory analysis based on optimization, we propose a new object function, which improve the time domain performance evaluation (such as overshoot and adjustment time).
Key Words：Simplex search; Object function; Parameter optimization