电光与控制
電光與控製
전광여공제
ELECTRONICS OPTICS & CONTROL
2014年
8期
77-82
,共6页
虚拟参考反馈校正控制%模型匹配%时变参数%规范系数%迭代辨识算法
虛擬參攷反饋校正控製%模型匹配%時變參數%規範繫數%迭代辨識算法
허의삼고반궤교정공제%모형필배%시변삼수%규범계수%질대변식산법
virtual reference feedback tuning control%model matching%time varying parameters%regularization coefficient%iterative identification algorithm
为折衷线性控制器和非线性控制器间的差距，采用虚拟参考反馈校正控制策略研究线性时变控制器的设计问题。对于两控制器中未知时变参数矢量的辨识，在原代价函数的基础上通过增加一项关于两未知时变参数矢量的规范项，来约束时变参数矢量的跳变特性。对于未知时变参数矢量的优化过程，采用可分离非线性最小二乘算法重复迭代以得到全局最优解。借助凸优化理论，推导出一个关键规范值，以此值作为规范值合适选取过程中的初始值。最后用仿真算例验证了辨识方法的有效性。
為摺衷線性控製器和非線性控製器間的差距，採用虛擬參攷反饋校正控製策略研究線性時變控製器的設計問題。對于兩控製器中未知時變參數矢量的辨識，在原代價函數的基礎上通過增加一項關于兩未知時變參數矢量的規範項，來約束時變參數矢量的跳變特性。對于未知時變參數矢量的優化過程，採用可分離非線性最小二乘算法重複迭代以得到全跼最優解。藉助凸優化理論，推導齣一箇關鍵規範值，以此值作為規範值閤適選取過程中的初始值。最後用倣真算例驗證瞭辨識方法的有效性。
위절충선성공제기화비선성공제기간적차거，채용허의삼고반궤교정공제책략연구선성시변공제기적설계문제。대우량공제기중미지시변삼수시량적변식，재원대개함수적기출상통과증가일항관우량미지시변삼수시량적규범항，래약속시변삼수시량적도변특성。대우미지시변삼수시량적우화과정，채용가분리비선성최소이승산법중복질대이득도전국최우해。차조철우화이론，추도출일개관건규범치，이차치작위규범치합괄선취과정중적초시치。최후용방진산례험증료변식방법적유효성。
To compromise the gap between the linear and nonlinear controllers,we made a study on how to design a linear time varying controller using virtual reference feedback tuning strategy .To identify the unknown time varying parameter vectors in the two linear time varying controllers,we added a new regularization term about the two unknown time varying parameter vectors to the formal cost function .So we could constrain the time varying parameter vectors'jump property in virtue of this regularization term .An iterative separable nonlinear least-squares identification method was proposed to estimate the unknown time varying parameter vectors .Through iterating,the global optimum of the time varying parameter vectors could be obtained .By means of the convex optimization theory,we derived a critical value,and take it as the starting point for finding the appropriate regularization coefficient .Finally,the simulation example results verified the validity of the identification method .
