SAE Mini Baja 為美國及國際間大學之間的工程設計競賽，主要係由研究生及大學生共同參與設計製作之單人越野車，本文以行駛崎嶇路面之運動越野競賽-SAE Mini Baja 車懸吊系統為研究對象，由於運動越野車SAE Mini Baja 之性能指標為全車前後懸吊系統的設計，本文進行懸吊系統設計時，前懸吊設計之主要目標為行駛於崎嶇路面時能有效穩定車輛行進方向，並能保持高效率之操控能力，故採取構造簡單、高阻力、低重量之雙A 臂懸吊系統設計，而後懸吊系統之主要目標為承載全車大部份負荷如引擎、傳動系統等等，為減少後懸吊系統所佔用之空間，故後懸吊系統採用麥花臣支柱式設計。利用多體模擬軟體ADAMS(Automated Dynamic Analysis of Mechanical Systems，ADAMS)建構懸吊系統之質量-阻尼-彈簧(MCK)二自由度Kenedi 模型以模擬實車測試，並藉以驗證此簡易二自由度模型模擬與實車測試之正確性，此外，亦探討不同彈簧係數對避震器性能之影響。其次，進行3D 懸吊系統之設計與分析，首先使用Solidword 繪圖軟體設計懸吊系統3D 實體模型，再應用ADAMS 模擬後懸吊實車墜落測試及全車行駛穿越障礙測試，並與二自由度MCK 之Buargue 模型和實車測試數值進行比較，驗證3D 懸吊系統模型之正確性，並藉以了解本文設計之懸吊系統是否滿足SAE Mini Baja 車在各種複雜和惡劣的崎嶇路面下行駛的需求及乘適性；本文之研究成果，應可為後續SAE Mini Baja 越野車設計參考。

Mini-Baja is the denomination of an off-road vehicle for one person designed and built by graduate and undergraduate engineering students with the orientation of a professor board. The objective of this paper was to design and analysis of suspension system on a SAE Mini Baja racing vehicle. In order to resist impact loadings that usually occur in an off-road circuit an integrated approach of mechanical design is developed to obtain an optimized vehicle suspension. The double arm “A” suspension was selected for front suspension which was a simple construction, high mechanical resistance and low weight. Efforts were made to model a front suspension type double A of an off-road vehicle Mini-Baja. The focus was stressed in the transmissibility of mechanical forces through front suspension. The rear suspension selection was accomplished through the study of its geometric characteristics to design its dimension and position of installation in the vehicle according to the expected behavior. A simple two-degree of freedom model originally developed by Kenedi et al. was adopted to study the behavior of the rear suspension and the influence of the main parameters in the transmissibility of accelerations and loads to the structure. An estimate for an optimal suspension adjustment was obtained with this simple model. A two-degree of freedom dynamic model was developed by Buarque et al. was also adopted to study the behavior of a Mini-Baja. The model considers the coupling between the front and rear suspension systems. ADAMS （Automated Dynamic Analysis of Mechanical system, ADAMS）numerical simulations were developed to study the 3D suspension submitted to a disturbance, quite similar to what happens when a vehicle in movement comes across a road obstacle like an elevation. The ADAMS solutions were compared to experimental results obtained from accelerometers and load-cells in Buargue simple test. The developed study indicates that this methodology can be used as an effective tool for the design and improvement of various vehicle suspensions.