The robust stabilization problem for a class of uncertain discrete-time switched systems is presented. A predictive sliding mode control strategy is proposed, and a discrete-time reaching law is improved. By applying ...The robust stabilization problem for a class of uncertain discrete-time switched systems is presented. A predictive sliding mode control strategy is proposed, and a discrete-time reaching law is improved. By applying a predictive sliding surface and a reference trajectory, combining with the state feedback correction and rolling optimization method in the predictive control strategy, a predictive sliding mode controller is synthesized, which guarantees the asymptotic stability for the closed-loop systems. The designed control strategy has stronger robustness and chattering reduction property to conquer with the system uncertainties. In addition, a unique nonswitched sliding surface is designed. The reason is to avoid the repetitive jump of the trajectories of the state components of the closed-loop system between sliding surfaces because it might cause the possible instability. Finally, a numerical example is given to illustrate the effectiveness of the proposed theory.展开更多
要:针对含电动汽车的综合能源系统(integrated energy system,IES)需要考虑可再生能源和需求侧的随机性和不确定性的问题,设计了一种基于经济模型预测控制(economic model predictive control,EMPC)的分层实时优化调度策略(hierarchical...要:针对含电动汽车的综合能源系统(integrated energy system,IES)需要考虑可再生能源和需求侧的随机性和不确定性的问题,设计了一种基于经济模型预测控制(economic model predictive control,EMPC)的分层实时优化调度策略(hierarchical real-time optimization strategy,HRTO),将整个系统的运行优化问题分为日前滚动优化,实时滚动优化和跟踪控制三个子问题。建立基于经济模型预测控制的日前优化策略,在保证经济性的同时确保启动的运行单元能够满足用户的需求,通过实时优化层优化整个IES的最优稳态操作点,设计跟踪模型预测控制器,跟踪上层传递的最优参考值。同时该策略通过引入电动汽车参与综合能源系统优化调度,充分发挥电动汽车的储能特性和灵活性,实现了电动汽车和各能源系统的协同优化。仿真分析表明,所提出的HRTO可以实现对电力负荷和建筑物温度设定点的跟踪。展开更多
基金supported by the Youth Science and Innovation Foundation of Harbin(2007RFQXG052).
文摘The robust stabilization problem for a class of uncertain discrete-time switched systems is presented. A predictive sliding mode control strategy is proposed, and a discrete-time reaching law is improved. By applying a predictive sliding surface and a reference trajectory, combining with the state feedback correction and rolling optimization method in the predictive control strategy, a predictive sliding mode controller is synthesized, which guarantees the asymptotic stability for the closed-loop systems. The designed control strategy has stronger robustness and chattering reduction property to conquer with the system uncertainties. In addition, a unique nonswitched sliding surface is designed. The reason is to avoid the repetitive jump of the trajectories of the state components of the closed-loop system between sliding surfaces because it might cause the possible instability. Finally, a numerical example is given to illustrate the effectiveness of the proposed theory.
文摘要:针对含电动汽车的综合能源系统(integrated energy system,IES)需要考虑可再生能源和需求侧的随机性和不确定性的问题,设计了一种基于经济模型预测控制(economic model predictive control,EMPC)的分层实时优化调度策略(hierarchical real-time optimization strategy,HRTO),将整个系统的运行优化问题分为日前滚动优化,实时滚动优化和跟踪控制三个子问题。建立基于经济模型预测控制的日前优化策略,在保证经济性的同时确保启动的运行单元能够满足用户的需求,通过实时优化层优化整个IES的最优稳态操作点,设计跟踪模型预测控制器,跟踪上层传递的最优参考值。同时该策略通过引入电动汽车参与综合能源系统优化调度,充分发挥电动汽车的储能特性和灵活性,实现了电动汽车和各能源系统的协同优化。仿真分析表明,所提出的HRTO可以实现对电力负荷和建筑物温度设定点的跟踪。
