摘要:操縱穩定性是汽車的重要使用性能之一，它不僅影響到汽車駕駛的操縱方便程 度，而且也是決定高速汽車行駛安全的一個重要性能，被稱為“高速車輛的生命線”。 為盡快推出高性能的新車，全球各大汽車廠家紛紛引入了計算機虛擬樣車技術，使 得設計者在汽車設計階段便能很好地了解該車的性能，并能根據需要，修改相關的 零部件或性能參數，得到最優的整車性能。在多體系統動力學分析軟件中，ADAMS 是車輛動力學中應用最廣，最為著名的一個軟件。本文正是利用動力學仿真軟件 ADAMS 研究探討懸架系統對操縱穩定性的影響。

本文應用多體系統動力學的理論和研 究方法，以多體系統動力學軟件 MSC.ADAMS，首先建立麥弗遜式懸架系統模型，為了使懸架模型更加真實，使懸 架局部零件柔性化，并針對懸架系統的運動特性進行仿真研究，研究跳動工況下的 懸架系統的運動特性，做出了懸架系統運動特性幾何分析相關參數的變化曲線圖。

　　　使用 ADAMS/CAR 通過修改模板參數及關鍵點位置，建立前懸架系統、轉向系統、 后懸架系統、制動系統、動力傳動系統、車身、輪胎等子系統，組建整車模型。針 對整車模型進行了開環跟隨特性的仿真，包括轉向盤角階躍輸入、轉向盤角脈沖輸 入、蛇形試驗。對各項試驗進行評分，表明該車操縱穩定性良好。然后對幾個影響 操縱穩定性的主要因素進行討論分析，包括質心高度、質心前后位置、前懸架剛度、 整車載荷度等參數。研究這些結構參數對整車瞬態響應的影響。

關鍵詞：麥弗遜式懸架，操縱穩定性，多體系統動力學，整車模型

Abstract:The handling stability is one of the most important performances of vehicle. It can Influence not only the vehicle’s handling convenience，but also the safety of a vehicle at a high speed，so it is called“the lifeline of the vehicle at high speed”. In ordering to

improve the capability of automobile, more and more vehicle factories around the world make  use  of  virtual  prototype  technology.  The  applications  of  virtual  prototype technology help the designers to better understand the characteristic of ride comfort, controllability,   stability   and   brake   performance,   so  that   they   can   judge   if   the performances of the vehicle meet the requirements. And we can prove the performances of the vehicle through amending the capability parameters. The software ADAMS, which developed with multi-body system dynamics, is the most fashionable and authoritative software in the field of mechanical dynamics simulation. This paper is mainly about there search of vehicle handling stability based on ADAMS.

　　　In this paper, by introducing the multi-body system dynamics theory and research Methods,   and   use   multi-body   dynamics   software   MSC.ADAMS   to   establish   a McPherson suspension systems model first. In order to make the model more vivid, suspend the flexibility of some local parts, the author does a simulation study on the movement characteristics of the suspension system. The study on movement characteristics of suspension system under the suspension of beating, based on which the author made a suspension of related geometric analysis parameter changes curve.

　　　By using ADAMS/CAR through the revision of template parameters and the highlight point, the author establish a front suspension systems, steering systems, rear suspension systems, brake systems, power train, body, tires, and other subsystems to set up vehicle model. They do open-loop simulation for the vehicle model including steering wheel angle step input, steering wheel angle pulse input and pylon course slalom test. Judging from the test scores given, the car is proved to be high performance in the handling and stability. Also several main factors which may affect on handling stability are discussed in order to study the rule of vehicle parameters affecting on transient response, including mass gravity center height, the location of center of mass and the load.

Keywords:  McPherson  suspension,  Handling  and  stability,  Multi-body  system Dynamics, Full vehicle assembly