In this paper , the author finds the inner relation between the torsion bar spring and the independent suspension system and understands how the torsion bar spring affects the functions of the independent suspension system . all that will redound to the performances amending of the independent suspension and the vehicle 通过研究，作者明确了独立悬架与扭力杆的内在联系，认识了扭力杆在悬架中的功能特性及其影响规律，从而有助于对悬架系统性能的改善，整车综合性能的提高。
Firstly , the design methods of main components of double - links independent suspension , including shock absorber " choosing , antiroll bar ' s calculation , torque bar spring ' s design , are presented and movement of double - links independent suspension is analysed . so a software which is used to design and analyse independent suspension is programmed . meanwhile , the experiment to verify the result is made with the equipment of the front wheel alignment 首先对双横臂独立悬架的各主要组成部件如减振器的选型设计、横向稳定杆的设计校核、扭杆弹簧设计以及对双横臂式和麦弗逊式独立悬架的运动进行了分析，提出了相应的计算方法，编制了一套具有一定实用价值的前独立悬架设计分析软件。
The suspension system on a automobile will effect the operating stability , the comfort , the turning ability , the life of its tire etc . the double - wishbone suspension is one of the independent suspensions applied broadly . the double - wishbone suspension is complex space mechanism with many loops and complicated movement 汽车悬架系统将直接影响汽车使用性能特别是操作稳定性、舒适性、转向轻便性和轮胎的使用寿命等方面的性能，双横臂独立悬架是目前汽车中使用最广泛的独立悬架之一。
Its invalidation of turning rupture leads to driving safety problems on the basis of research on the torsion bar spring in the suspension system , the paper finds the way to enhance the performance of the suspension system . the paper establishes the mathematical model of the double wishbone independent suspension , analyses the specific structure in theory , uses the softwares of adams and matlab to simulate the functions which are nearly similar with the actual working conditions . at the same time , the paper adopts the way of parameterized design , programs to adjust the system parameters conveniently and inducts the optimize design with the concrete targets to improve the suspension system performance 本文的研究方法是通过建立扭力杆与独立悬架的数学模型，以理论分析为基础，结合具体的悬架结构，运用adams和matlab软件，对研究的对象进行仿真分析，使设计人员在近似真实的模拟条件下能够更好的对目标进行研究；同时，还引入了参数化的设计方法，通过编程，增加了人机交互式界面，可灵活的对悬架导向机构主要构件的空间几何尺寸进行动态调整；在优化设计过程中，针对汽车悬架运动学、动力学的特定要求，对具体的目标进行优化设计，从而获得良好的行驶平顺性和操纵稳定性。
