基于事件触发的Buck型DC-DC变换器有限时间控制

Finite-time Control of DC-DC Buck Converters Based on Event-Triggered

针对Buck型DC-DC变换器输出电压跟踪控制问题,提出了一种基于事件触发机制的有限时间控制方案;首先,将Buck变换器建模成一类反馈型非线性系统;然后,为能有效地避免通信资源的浪费,通过构造一种状态变换设计了一种事件触发机制;同时,利用反步法,设计了系统的状态反馈控制器,该控制器在事件触发时刻更新;然后,基于所设计的事件触发控制器,利用有限时间Lyapunov稳定性理论分析了系统的稳定性,并证明了所设计的控制方案不会发生Zeno现象;最后,通过Buck变换器仿真实例验证了所提出的事件触发控制方案的有效性,仿真结果表明了在所设计的控制方案下,Buck型DC-DC变换器的输出在有限时间内可以达到期望值,同时还能减少通信资源的浪费。

Aiming at the problem of output voltage tracking control for Buck DC-DC converter,a finite-time controller based on event-triggered is proposed.Firstly,the Buck converter is modeled as a class of feedback nonlinear system.Then,in order to effectively avoid unnecessary waste of communication resources,an event-triggered scheme is designed by constructing a kind of state transformation.At the same time,the state-feedback controller which is dependent on triggering instants is designed by using backstepping.Then,based on the proposed event-triggered controller,the stability of closed-loop system is analyzed by using finite-time Lyapunov stability theory,and the control scheme is designed and proved to be the Zeno phenomenon.Finally,the effectiveness of the proposed event-triggered control scheme is verified by the simulation example about the Buck converter,the simulation results show that the proposed control method can reach the prescribed voltage for the Buck DC-DC converter in finite time,the waste of communication resource can be reduced at the same time.