Abstract
Conventional controllers used for active vibration control of smart structures often evaluate amplitude of control inputs as part of objective functions and suppress the amplitude of the inputs. The major intents of the control input amplitude suppression are energy consumption suppression and saturation prevention. However, energy regenerative vibration control systems regenerate vibration energy and larger inputs do not mean larger energy consumption. Therefore, the first intent of the control input amplitude suppression is not suitable for energy regenerative vibration control systems. In addition, saturation prevention, the second intent, should be treated as a constraint rather than part of objective functions. In this paper, a novel controller suitable for energy regenerative vibration control systems is proposed. The controller is based on model predictive control and the computational cost is reduced by using harmonic functions as basis functions of input. The approach gives good prediction of averaged regeneration power in future and the prediction can help power management of energy regenerative vibration control systems.
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