燃料電池複合動力機車懸吊設計與減震分析

Fuel Cell Hybrid Scooter Suspension Design and Vibration Analysis

振芫舜(Yuan-Shun Cheng)

指導教授 ： 鄭榮和

國立臺灣大學/工學院/機械工程學研究所/碩士(2009年)

https://doi.org/10.6342/NTU.2009.01060

摘要

燃料電池系統為能有效提供電動載具續航力以及降低填充能量時間的重要零組件，然而燃料電池電堆在操作下有相當多限制，對於震動的耐受力也低於一般內燃機引擎。雖然燃料電池電堆不像內燃機一樣有活動組件會產生震動，但是當它應用在道路載具時，由路面傳來的震動依舊會對其造成傷害。本研究針對燃料電池複合動力機車進行震動模擬分析，並對懸吊系統進行調整，以降低燃料電池受到的衝擊。
由於燃料電池機車空間較為狹小，無法像其他載具一樣利用安裝減震平台的方式來降低震動，在本研究裡面主要藉由調整懸吊系統來達到減震設計。根據燃料電池所能承受的震動範圍，進行減震系統分析、彈簧阻尼系統敏感度分析及懸吊系統設計。根據分析結果，可成功模擬出燃料電池機車以不同速度在道路上所受到的震動與車身動態，並利用彈簧阻尼系統達成燃料電池減震的功能；而根據實驗結果也可證實減震系統有效降低震動，並將震動產生之加速度降低至3g以下。在一般路面下操作不需特別閃躲路面凹凸不平來保護燃料電池系統，可依照一般騎乘習慣來操作此載具。

關鍵字

燃料電池 ； 載具 ； 懸吊設計 ； 動態模擬 ； 震動

並列摘要

Fuel cell system is an important part to extend mileage and reduce recharging time for electrical vehicle. However, there are some limits under operation; the vibration tolerance is much lower than internal combustion engine. Although fuel cell stack operates with few moving parts and almost no vibration, and the vibration from road could still cause damage to the fuel cell stack. In this study, a combination of fuel cell hybrid scooter vibrating simulation analysis and suspension system adjustments were proposed to reduce the road impact acceleration on fuel cell stack.
According to the fuel cell stack sustainable vibration range, a CAE software ADAMS is added to do sensitivity analysis and suspension system design to reduce the vibrating acceleration. In the analysis result, the vibrating acceleration and dynamic performance for the scooter could be successfully simulated under different riding speed, and successfully be reduced by using spring – damping system.
The experiments verified CAE simulating results and show a high coherence, also successful reducing the vibrating acceleration under 3g. By using the design method proposed in this research, a fuel cell scooter could also keep the dynamic performance and achieve fuel cell stack protection target without changing conventional riding custom.

並列關鍵字

Fuel cell ； Vehicle ； Suspension design ； Dynamics simulation ； Vibration

參考文獻

[18] 朱庭輝，俯仰模型於車輛乘適性能之分析與驗證，國立台灣大學機械工程研究所碩士論文，2007

[33] 李怡萱,2004, 市區道路平坦度檢測標準及其於養護排序模式整合之應用,國立台灣大學土木工程學研究所碩士論文,P134-138

[10] A.R. Miller , K.S. Hess, D.L. Barnes, T.L. Erickson ,2007, System design of a large fuel cell hybrid locomotive, Journal of Power Sources,173,935–942

[12] N. Rajalakshmi*, S. Pandian, K.S. Dhathathreyan,2009, Vibration tests on a PEM fuel cell stack usable in transportation application, international journal of hydrogen energy, 2009, 1 – 5

[13] Tseng, T. and Hrovat, D., "Some characteristics of optimal vehicle suspensions based on quarter-car models", Proceedings of the IEEE Conference on Decision and Control, Honolulu, HI, USA, pp.2232-2237, 1990.