作　　者： ; ;

机构地区： 华南理工大学电子与信息学院

出　　处： 《华南理工大学学报（自然科学版）》 2011年第5期6-11,共6页

摘　　要： 引入离散协同控制方法来解决目前非线性动态系统中非线性控制方法难以实用化的问题.文中详细分析了离散协同控制的特性及在DC-DC变换器控制中的应用,归纳出了离散协同控制方法的一般形式,利用变结构控制与协同控制的相似性分析离散协同控制流形的存在条件、到达条件和收敛速度,并分析了离散协同控制下闭环系统的稳定性及一定条件下的鲁棒性,最后讨论了离散协同控制参数对控制性能的影响.分析和Simu-link仿真结果表明,离散协同控制系统能从任意初始状态以指数收敛到流形,并渐近稳定在目标工作点上,对满足一定条件的系统内部参数扰动和外部干扰具有不变性. As the existing nonlinear control methods are difficult to apply to practical nonlinear dynamic systems,a discrete synergetic control strategy is proposed in this paper.In the investigation,first,the characteristics of the discrete synergetic control and its application to DC-DC converters are analyzed.Next,the general forms of the syner-getic controller are summarized,and the existence and hitting conditions as well as the convergence speed of the control manifold are discussed based on the similarity of the variable structure control to the synergetic control.Then,the stability and robustness of the closed-loop system driven by the synergetic controller are investigated.Finally,the effects of control parameters on the control performance are discussed.Both the analysis and Simulink simulation results show that,with the discrete synergetic control,manifolds can be exponentially reached from any original states,the control system asymptotically stabilizes at the objective working point,and the invariance against system parameter variation and external perturbation can be achieved when the matching conditions are satisfied.

关 键 词： 离散控制 协同控制 变换器 变结构控制 鲁棒性

领　　域： [电气工程]