Research and simulation of wireless sensor and actuator networked control system

Wireless sensor and actuator networked control system(WSANCS) is composed of a group of distributed sensors and actuators that communicate through wireless link which achieves distributed sensing and executing tasks. The time delay of the controlled plant and wireless transmission may have bad impacts on the system performances. Aiming at solving this problem, this paper firstly introduces the related work and construction of WSANCS based on the latest TrueTime toolbox under Windows 7 and Matlab R2010b, of which the controlled plant is a DC servo and the nodes communicate with each other by IEEE 802.15.4 protocol. Then the simulation model is given. Thirdly, performances of WSANCS are compared under the traditional PID and fuzzy PID algorithms, which show that the fuzzy PID control algorithm can get better control effects and higher robustness in a time-delay system. Finally, the conclusions are outlined.