A NARROWBAND ACTIVE VIRBATION CONTROL SYSTEM WITH A DIGITAL TACHOMETER

• 作 者: Fengyan An Hongling Sun
• 机 构: KeyLaboratoryofNoiseandVibrationResearch,InstituteofAcoustics,ChineseAcademyofSciences
• 出 处: 中国科学院声学研究所第四届青年学术交流会
• 发表日期: 2012年10期
• 关键词: active vibration control reference synthesization

　　Reference signals are generally necessary for narrowband active vibration control systems with feedforward algorithms,which could be generated by internal model control method,frequency estimation methods,etc.However,with these methods the control performance is generally limited by the existence of modeling errors or frequency estimation errors.This paper presents a narrowband active vibration control system,in which the reference signal is synthesized using a digital tachometer.The tacho sensor is a digital encoder fixed on the shafts of rotating vibration sources,whose outputs are square waves related to the rotating speed of the shafts.Compared with traditional methods,the limitations caused by modeling errors or frequency estimation errors could be avoided.Simulations are carried out with data recorded from a four-mount vibration isolation system,through which the efficiency of the proposed method is verified.