Prevention of stroke saturation of inertial actuators used for active vibration control of floor structures
Research on active vibration control(AVC)of human-induced vibrations in floors and foot-bridges has accelerated in recent years and it might be feasible for AVC systems soon to replace traditional passive vibration mitigation systems.Most AVC applications use inertial-mass actuators to provide control forces.However,the control performance is limited by actuator dynamics and nonlinearities.In this work,the stroke saturation of inertial actuators is examined,to prevent the case where excessive movement of the inertial mass can occur and damage the actuator.In this study,two inner loops around the actuator have been incorporated into a direct velocity feedback(DVF)control loop.These inner loops are designed to provide a tight control over the actuator mass displacement.One loop is a proportional and derivative(PD)controller based on the measured displacement of the actuator mass.The other inner loop is utilized as a gain modification loop which adaptively regulates the DVF gain value whenever over-ranges from the actuator stroke are predicted.The performance of this control strategy is demonstrated both in simulations and experimentally on a laboratory scale floor structure.Good control effectiveness is achieved whilst maintaining actuator stroke within allowable limits.
structural control active vibration control inertial actuator stroke saturation human-induced vibrations
Mohammad Wasi Ahmadi Wai Kei Ao Paul Reynolds
University of Exeter,Vibration Engineering Section College of Engineering,Mathematics and Physical Sciences North Park Road,Exeter EX4 4QF,UK.
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
3330-3338
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）