Abstract
It is difficult to maintain the precision of ultra-precision equipment under the interference of vibration and noise, and the performance of the widely used passive control method is limited. This paper proposes a dual-loop active hybrid vibration control (AHVC) based on RBF-RLS adaptive algorithm, which includes a feedback control loop and a feedforward control loop. The integral force feedback (IFF) control loop based on the sky-hook control law is built to effectively reduce the resonance peak of the system, but its time-delay phenomenon restricts the control effect. RLS adaptive feedforward algorithm is used in feedforward control, and RBF neural network is used to identify feedforward model, so as to improve the accuracy of feedforward response. The simulation results show that the amplitude of the resonance peak is reduced by 30.1 dB and the attenuation rate is 96.9% for the vibration isolation system using the dual-loop active hybrid control technology.
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