Time delay compensation method based on partial state feedback and active increasing time delays

Time delay is a more general phenomenon in the structural vibration control. Time delay may not only degrade the performance of the control system but also induce instability to the system and control divergence. Conventional time delay compensation methods mostly are to reduce time delay as a hazard, a new compensation method which actively uses time delay based on velocity feedback is proposed in this paper. The objectives of the present study are divided into three parts: Firstly based on theoretical analysis, a new compensation method which actively increases time delay based on velocity feedback is proposed. Secondly, combined with large amount of simulation results, parameter influence rule of active control algorithm is analyzed in detail both qualitatively and quantitatively. Finally, using monolayer shearing model frame structure as controlled objective, compensation experiments which actively increases time delay based on velocity feedback under multi-input stimulation environment were verified. Large amount of simulation analysis and experiment results demonstrate that methods proposed in the paper can guarantee system stability while obtain considerable control effects.