Development of vibration Isolation system using high-performance damping metal

研究了阻尼金属M2052的力学性能。它的阻尼性能相当好，但有时由于塑性变形或应力而退化，这是在M2052弹簧上造成的，以支持质量的重量。用几种表面处理方法测量了出气量。测量出气率约为典型不锈钢的十倍。但是由于M2052的用量不是很大，所以M2052的废气所造成的影响并不严重。设计、组装并测试了样机隔振系统。由于M2052损耗大，我们没有观察到明显的机械共振峰；与基频共振相比，这提高了高频的隔振比。我们制作了一个主动隔振系统，主要结构材料为M2052。通过优化控制回路，我们将隔振提高了20-40 dB。M2052的阻尼性能可以提高控制系统的稳定性。利用新型光学传感器对M2053的非线性特性进行了时域和频域分析。由于我们的传感器的灵敏度非常好，我们能够测量三十年振幅范围内的振动，在那里我们已经确认了大振幅的非线性异常和小振幅的线性响应。

Mechanical property of the damping metal M2052 was investigated. Its damping performance was quite well but sometimes degraded owing to plastic deformation or stress which was caused on the M2052 springs to support the weight of the mass.The outgas rate was measured with several surface treatment methods. The measured outgas rate was about ten times larger than that of typical stainless steel. However, since the amount of M2052 is not so large, the effect due to the outgas from M2052 is not serious.The prototype vibration isolation system was designed, assembled and tested. Because of the large loss of M2052, we have not observed no significant peaks showing spurious mechanical resonance; this improves the vibration isolation ratio at higher frequency than that of the fundamental resonance.We have made an active vibration isolation system, where main structure was made of M2052. By optimizing the control loop, we have improved the vibration isolation by 20-40 dB. The damping performance of M2052 may increase the stability of the control system.The non-linear characteristics of M2053 was investigated by a newly developed optical sensor in terms of time domain and frequency domain analysis methods. Since, the sensitivity of our sensor was quite good, we were able to measure the vibration in the amplitude range of three decades, where we have confirmed the non-linear anomaly at large amplitude and linear response at small amplitude.