输入受限的Buck型直流变流器自适应动态面控制

Adaptive dynamic surface control of Buck DC converter with input constraint

采用自适应动态面设计控制器,对输入受限、负载不确定的Buck型直流变换器模型进行控制.引入一阶滤波器,解决了传统反步法中方程项数的膨胀和复杂求导问题;引入一个辅助控制变量,保证系统在指定范围内输入,从而得到有效的控制器设计方案.李亚普诺夫稳定理论证明了该闭环系统是一致最终有界的,跟踪误差收敛在原点附近较小邻域内.仿真结果验证了控制器性能有效.

Adaptive dynamic surface control was proposed for the uncertain DC-DC buck converter system with input constraint.The introduction of first-order filters allows the algorithm to be implemented without differentiating any model nonlinearities and suffering from the ‘ explosion’ problem.By introducing an auxiliary control variable to ensure controller output within the specified range,an effective controller design method was developed.The proposed control law can guarantee the uniform ultimate boundness of all signals in the closed-loop system via Lyapunov synthesis,and make the tracking error converge to less neighborhood nearby origin.Numerical simulations are provided to illustrate the validity of the proposed control method.