摘要
针对同时存在前向通道和反馈通道数据包丢失的离散时间系统,分别将数据包丢失作为独立的贝努利过程进行建模。通过对量化器量化水平参数的约束条件,确保状态估计在均方差意义下的稳定,并基于约束条件获得前向通道的最大丢包率的一个上界。与此同时,基于线性二次型最优控制(LQG)性能指标和状态估计,给出了具有数据包丢失的系统最优控制律,运用线性矩阵不等式(LMI)技术和二分法进行优化设计,并给出了反馈通道最大丢包率的一个优化算法。最后通过仿真实例验证了理论结果。
To the discrete-time plants existed packet loss in both forward paths and feedback paths, the process of data packet loss is modeled as independent Bernoulli processes. By regulating the restrict conditions of the level parameters of the quantizers, the mean-square stability in state estimation is guaranteed, and an upper bound of biggest packet loss rate of the forward path based on the above constrained conditions is acquired. Meanwhile, based on the performance criterion of linear quadratic Gauss ion （LQG）, the optimal control law of the system under data packet loss and the optimal design method based on the technique of linear matrix inequality （LMI） and bisection method are presented. Then, an optimum algorithm on the biggest packet loss rate of the feedback path is also given. Finally, some simulation examples are given to verify the theoretical results.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2008年第7期1324-1327,共4页
Systems Engineering and Electronics
关键词
网络控制系统
数据包丢失率
状态估计
最优控制
networked control systems
data packet loss rate
state estimation
optimal control law
