運用適應性訊號處理與比例控制於主動隔振系統

Active Vibration Isolation by Adaptive Signal Processing and Proportional Control

吳偉豪(Wei-Hao Wu) ； 葉孟松(Meng-Sung Yeh) ； 劉雲輝(Yun-Hui Liu)

《中華民國振動與噪音工程學會論文集》 2012 (2012/06) Pp. 233-238

https://doi.org/10.30028/CSSVANNUAL.201206.0233

摘要

本研究運用適應性比例控制器，進行隔振系統自然頻率振動抑制之主動控制研究，輸入訊號採用絕對振動速度，其由加速規量得訊號經積分器積分後獲得，經由控制器運算輸出控制訊號，驅動音圈致動器抑制自然頻率振動。由於加速度訊號經過積分器積分後之速度訊號會產生相位差的問題，因此本研究採用適應性訊號處理技術，進行相位差的修正，經由實驗證明可行。量測被動式隔振系統平台上之振動量，被動式隔振系統只能達到VC-B之振動規範。運用適應性比例控制器控制隔振平台，進行主動控制實驗，從實驗結果控制後自然頻率之傳遞率從24dB降為-1.4dB，振動能量可以減少99%，達到VC-E之振動規範。

關鍵字

主動振動控制 ； 適應性訊號處理 ； 比例控制 ； 天勾式阻尼器

並列摘要

An active vibration control system that applies proportional controller incorporated with an adaptive filter to reduce the resonance of the passive isolator at natural frequency is proposed in this work. The absolute vibration velocity signal acquired from an accelerator and being processed through an integrator is input to the controller as a feedback signal, and the controller output signal drives the voice coil actuator to produce a sky-hook damper force. In practice, the phase response of integrator at low frequency such as 2~5 Hz deviate from the 90 degree which is the exact phase difference between the vibration velocity and acceleration. Therefore, an adaptive filter is used to compensate the phase error in this paper. An analysis of this active vibration isolation system is presented, and model predictions are compared to experimental results. The results show that the proposed method significantly reduces transmissibility at resonance from 24dB to -1.4dB without the penalty of increased transmissibility at higher frequencies.

並列關鍵字

active vibration control ； adaptive signal processing ； proportional control ； sky-hook damper