The problem of robust H∞ guaranteed cost satisfactory fault-tolerant control with quadratic D stabilizability against actuator failures is investigated for a class of discrete-time systems with value-bounded uncertai...The problem of robust H∞ guaranteed cost satisfactory fault-tolerant control with quadratic D stabilizability against actuator failures is investigated for a class of discrete-time systems with value-bounded uncertainties existing in both the state and control input matrices.Based on a more practical and general model of actuator continuous gain failures,taking the transient property,robust behaviour on H∞ performance and quadratic cost performance requirements into consideration,sufficient conditions for the existence of satisfactory fault-tolerant controller are given and the effective design steps with constraints of multiple performance indices are provided.Meanwhile,the consistency of the regional pole index,H∞ norm-bound constraint and cost performance indices is set up for fault-tolerant control.A simulation example shows the effectiveness of the proposed method.展开更多
针对下垂控制中因线路阻抗不匹配,导致微电网无功环流问题,文章采用了基于线性自抗扰(Linear Active Disturbance Rejection Control,LADRC)改进的一致性控制策略,均分网内无功功率。与传统的自抗扰控制器相比,由于LADRC代替了PID环节,...针对下垂控制中因线路阻抗不匹配,导致微电网无功环流问题,文章采用了基于线性自抗扰(Linear Active Disturbance Rejection Control,LADRC)改进的一致性控制策略,均分网内无功功率。与传统的自抗扰控制器相比,由于LADRC代替了PID环节,不再需要积分控制项,避免了积分饱和现象,并且各分布式发电(Distributed Generation,DG)单元也摆脱了对中央处理器的依赖。仿真结果表明,文章所提出的LADRC改进一致性控制策略,可以有效地测量DG单元的无功功率数值,并实现对各DG单元的无静差控制、均分网内的无功功率。展开更多
基金supported by the National Natural Science Foundation of China (6057408260804027)
文摘The problem of robust H∞ guaranteed cost satisfactory fault-tolerant control with quadratic D stabilizability against actuator failures is investigated for a class of discrete-time systems with value-bounded uncertainties existing in both the state and control input matrices.Based on a more practical and general model of actuator continuous gain failures,taking the transient property,robust behaviour on H∞ performance and quadratic cost performance requirements into consideration,sufficient conditions for the existence of satisfactory fault-tolerant controller are given and the effective design steps with constraints of multiple performance indices are provided.Meanwhile,the consistency of the regional pole index,H∞ norm-bound constraint and cost performance indices is set up for fault-tolerant control.A simulation example shows the effectiveness of the proposed method.
