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27 June 2002 Power flow analysis for amplifier design and energy harvesting
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The power requirements imposed on a active vibration isolation system are quite important to the overall system design. In order to improve the efficiency of an active isolation system we analyze different feedback control strategies which will provide an electrical energy regeneration. In this case, the power is flowing from the mechanical disturbance through the electromechanical actuator and its switching drive into the electrical storage device (batteries or capacitors). We demonstrate that regeneration occurs when controlling one or both of the flow states (velocity and current). This regenerative control strategy also affects the closed loop dynamics. The regenerative control applied to a voice-coil actuator results in a closed loop system which has a reduced amount of damping compared to the initial system. In fact the regenerative control strategy will increase the level of vibration compared to the closed electrical circuit boundary condition in order to make the system absorb more energy, of which a part is transferred to an electrical storage device.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nikola Vujic, Donald J. Leo, and Douglas K. Lindner "Power flow analysis for amplifier design and energy harvesting", Proc. SPIE 4697, Smart Structures and Materials 2002: Damping and Isolation, (27 June 2002);

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