應用非線性元件模組之創新微振避振平台研發

The Creative Workbench Design for Mirco-vibration Isolation by Employing Non-linear Elements

蔡忠瑾(Jung-Jin Tasi)

指導教授 ： 黎文龍

國立臺北科技大學/機電學院/機電整合研究所/碩士(2006年)

https://doi.org/10.6841/NTUT.2006.00126

摘要

被動式減或避振平台由於架構簡單、成本低廉，因此，在工業界仍然被廣泛的應用，但被動式平台最大的缺點是無可變性，適用之頻寬固定，幾乎無使用彈性可言，為了改善此缺點，本研究應用了一非線性之碟型彈簧來設計被動式避振平台。研究過程中，先將設計之平台模型化，利用碟型彈簧數之學模式，再以MATLAB_Simulink模擬驗證，模擬之結果顯示出，碟型彈簧之幾何尺寸及預壓程度可以改變系統本身之自然頻率。研究應用設計時，為了得到碟型彈簧之適當的幾何尺寸，應用COSMOS/Design STAR軟體之非線性分析部份來得到非線性元件最佳的尺寸，經由模擬分析來驗證所設計避振平台具有其功效後，再依創新構想完成設計之圖及製作。在實驗驗證方面，除了以拉伸壓力測試機對碟型彈簧進行特性分析外，另於平台方面則是以衝擊槌敲打產生一寬頻帶刺激所設計之避振平台，可得到此平台的自然頻率，且經過多次的調諧預壓彈簧之預壓程度，結果顯示此平台確實能藉由調整預壓彈簧來改變自然頻率，且與模擬之結果相近，也更驗證了平台其功效。最後架設一模擬干擾環境，對此平台做動態實驗，由實驗結果可知，此平台在振動上也能達到減振的效果。

關鍵字

避振平台 ； 碟型彈簧 ； 非線性元件

並列摘要

The passive isolator is still widely used in the industries, but the main shortcoming of it stems from that their inflexibility to the environments. Noting the deficiencies, the present study improves the passive isolator design by adding the nonlinear components to it. After many simulations are carried out, the nonlinear element has been selected as Belleville spring. In addition, the Belleville spring constant is measured by a push-pull tester under several different loadings. The results show that it works as the author expects. Before the workbench is designed, it has been modeled and simulated by using the commercial software. The simulation result shows that the nonlinear element can be used to tune the natural frequency by adding pre-loads. Based on this result, the present isolator workbench is made after carefully analyzing and optimizing the design parameters. In order to verify the natural frequency of the workbench, the system is struck with an instrumented impacting hammer. It has been found that the present passive isolator can be successfully used to minimize the micro-vibrations. The remarkable vibration reduction in some frequency bands has been also observed.

並列關鍵字

Isolator workbench ； Belleville spring ； Non-linear components

參考文獻

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