Wireless control of structural vibration has a broad application prospect

but the time delay in wireless control significantly reduced the performance of it.As a result

time delay in wireless control has become an urgent problem.In this paper

a typical structure of universal application-cantilever beam is taken as the control object

and wireless sensors based on the WiFi technique is designed.Moreover

a WiFi wireless control system based on the piezoelectric cantilever is designed and implemented.In this wireless program

both sensor signals and control signals are transmitted in wireless way.Meanwhile

in order to solve the time delay problem

a time delay compensation method is used.A time delay state is contrasted in this method

and the state equation of the beam is extended by the time delay state.The simulation results show that this method can effectively compensate the time delay in this wireless control system

significantly improve the performance of wireless control

even can make the performance of wired control.