Linear Control Design for Regeneratively-Actuated Structures with Energy Storage Subsystems

摘要

A Regenerative Force Actuation(RFA)Network is a system of electromechanical forcing devices used for the purpose of structural vibratory response control.The various actuators are connected through power-electronic switching circuitry to a common electrical power bus.Also connected to the power bus is an energy-storing subsystem,such as a supercapacitor,flywheel,or battery.The actuators may be operated as generators or motors,and the energy removed from the vibrating structure by one actuator may be driven back into the structure by another,or may be temporarily stored for later use.Because the entire system is controlled through the alternation of transistor switches,the system is capable of managing orders of magnitude more electrical power than is required for the control.However,the absence of an external power supply also constrains the forcing capability,and consequently constrains the feasible set of feedback laws the actuation system can impose.This paper models this dynamic force constraint for RFA networks with energy storage subsystems,and characterizes a feasible set of linear structural control laws in terms of hardware parameters.Several examples are given in which dynamic controllers are optimized,subject to this regenerative constraint,and performance is compared to the optimal performance acheivable with linear viscous damping.