Optimization algorithm for sampling frequency assignment in wireless sensor network-based control system
Siping Wang · Kongzhi yu juece · 2007
A sampling frequency assignment problem is discussed in networked control systems which are based on wireless sensor network.The problem is formulated as a nonlinear optimization problem,whose objective function is to minimize the difference indexes between the digital and the anolog control systems,subject to node communication capacity constraints.With a barrier function method,an iterative distributed algorithm based on local buffer information is then proposed.This algorithm has features of low computational complexity and good feasibility.Simulation results show that the frequency sequence generated by the iterative distributed algorithm can effectively converge to an optimal solution,and can adapt to the changes of system load.