Active vibration suppression with disturbance force estimation

Abstract

Vibration is a basic phenomenon that has attached control engineering’s attention for many decades. Vibration rejection in control systems is implemented with passive, semi active and active vibration suppression systems. These methods commonly use multiple redundant sensors. Multiple sensor usage and complex control has implemented the cost of operation and complexity. Minimal sensor usage to provide vibration suppression within the commonly used acceleration or deflection observation could be used to reduce the complexity and the cost of the system. This dissertation proposes a novel methods which uses either the acceleration or motor deflection measurement based disturbance force observe for vibration observations and to suppress the vibrations with active vibration suppression. The proposed system is capable of estimating the disturbances and compensate disturbance using the only a acceleration or suppression deflection sensory data. Proposed system still could work as a traditional vibration suppression system in case of a failure to active system. Active for to be injected is calculated based on the disturbance forces acting on the sprung mass. A novel method is proposed for spring and damper parameter measurements with electromagnetic actuators which enhance the overall system performance. A Quarter car model is used to illustrate the adaptability, robustness, and the vibration suppression capabilities of the system. Performance of the active vibration suppressor and disturbance observer is measured using system simulations and practical results. Simulation and practical system responses provide evidence of robust vibration suppression capabilities of the proposed method under different conditions.