摘要
为了研究惯性冲击马达运动中的振动问题并进行控制,推导了固有频率表达公式,分析了振动产生的原因,根据固有频率设计了1阶有源低通滤波器作为隔振环节,最后以一台对称式惯性冲击马达为对象进行了实验。实验结果表明,锯齿信号中与固有频率相近的高次谐波是造成惯性冲击马达运动不稳定的重要因素,应用滤波电路后,该马达的平均速度随着驱动频率的增大保持了线性增长,有效消除了振动因素,但锯齿信号的冲击作用减弱导致运动速度有所下降。
To investigate and control the vibration in impact drive mechanism（IDM）,the expression formula for its natural frequency was derivate.The reason resulting into vibration was analyzed.According to natural frequency,a first-order active low-pass filter was designed as vibration isolator.Experiments were made based on a symmetric impact drive mechanism.The research results revealed that the high harmonic which was equal to the natural frequency in sawtooth wave was an important factor causing instability of this piezo motor.The low-pass filter was an effective tool to eliminate the harmful harmonic.Then,the velocity was increasing linearly with the driving frequency.But the velocity was lowered a little due to the decrease of the signal＇s impact.
出处
《压电与声光》
CSCD
北大核心
2010年第6期970-972,977,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(50607018)
关键词
惯性冲击马达
振动控制
固有频率
高次谐波
低通滤波器
impact drive mechanism
vibration control
natural frequency
high harmonic
low-pass filter
