Development of vibration Isolation system using high-performance damping metal

开发使用高性能阻尼金属的隔振系统

• 批准号: 11554008
• 负责人: MIO Norikatsu
• 金额: $ 8.96万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11554008/
• 关键词: Damping metal; Vibration isolation system; gravitational wave detector

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.

研究了阻尼金属M2052的机械性能。其阻尼性能相当好，但有时会因支撑质量体重量的 M2052 弹簧上产生的塑性变形或应力而降低。通过多种表面处理方法测量脱气率。测得的脱气率大约是典型不锈钢的十倍。但由于M2052的用量不是很大，M2052脱气的影响并不严重。对原型隔振系统进行了设计、组装和测试。由于 M2052 损耗较大，我们没有观察到显示虚假机械共振的显着峰值；这提高了比基本共振频率更高的隔振比。我们制作了主动隔振系统，其主体结构由M2052制成。通过优化控制回路，我们将隔振性能提高了 20-40 dB。 M2052的阻尼性能可以提高控制系统的稳定性。利用新开发的光学传感器从时域和频域分析方法研究了M2053的非线性特性。由于我们的传感器的灵敏度非常好，我们能够测量三十个十进制的振幅范围内的振动，我们已经证实了大振幅下的非线性异常和小振幅下的线性响应。