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某些超精密设备可以简化成一个简单的二自由度振动系统,上质量块起到消振作用,当对下质量块施加简谐激振时,设备主体振动被削弱,若上下质量块重量比选择适当,则设备主体振动可完全消除。
Some ultra-precision devices can be simplified into a simple two-degree-of-freedom vibration system. The upper mass plays the role of vibration damping. When a simple harmonic excitation is applied to the lower mass, the vibration of the main body of the device is weakened. If the upper and lower weight ratios Choose appropriate, the main vibration of the device can be completely eliminated.