Observer-based switched control design for switched linear systems with time delay in detection of switching signal
We investigate the observer-based switched control design problem for switched linear systems with time delay in detection of switching signal. First, an improved and generalised estimate on the matrix norm is established (Lemma 2 in Section 2). Then, based on two important lemmas, under the assumption that each subsystem is controllable and observable, online and offline observer-based switched control design methods to guarantee the asymptotical and exponential stabilisabilities are given, respectively. Finally, an example is given to illustrate the results. Our results complement the results of Xie et al. about state feedback stabilisation of switched linear systems.
Wireless sensor networks have been deployed for many applications such as surveillance an area or a set of targets and lifetime maximization is one the most important challenges in wireless sensor networks. When a set of sensor nodes dropped into a field by aircraft or manually to monitor a set of targets, scheduling sensor nodes to monitor deployed targets is necessary to prolong network lifetime. Scheduling sensor nodes into cover set is one of the most important approaches to solve this problem. Hence, it is desirable to activate a minimum number of sensor nodes that are able to monitor all targets and turn off redundant nodes to save energy. In this paper, we used Imperialist Competitive Algorithm (ICA) to schedule sensor nodes into cover sets that can monitor deployed targets and increase lifetime and ICA is used as a method to create cover set in network. To study performance of our approach computer simulations conducted and results of