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An explicit integration method for realtime simulation of multibody vehicle models

机译:多体车辆模型实时仿真的显式集成方法

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High performance computers have been used for realtime simulation of multibody vehicle dynamics models consisting of many bodies and joints, a powertrain model, antiroll bars, and tires. This research proposes an efficient implementation algorithm for explicit numerical integration methods so that relatively low cost computers can be used for the realtime simulation of the multibody vehicle dynamics models. Newton chord method is employed to solve the equations of motion and constraints. The equations of motion and constraints are formulated such that the Jacobian matrix for Newton chord method is needed to be computed only once for a dynamic analysis. Nuinerical experiments showed that the Jacobian matrix generated at the initial time could have been utilized for the Newton chord iterations throughout simulations under various driving conditions. Convergence analysis of Newton chord method with the proposed Jacobian updating method is carried out. The proposed algorithm yielded almost exact soIutions for a prototype vehicle multibody model in realtime on a 400 MHz PC compatible.
机译:高性能计算机已用于多主体车辆动力学模型的实时仿真,该模型由许多车身和关节,动力总成模型,防倾杆和轮胎组成。这项研究提出了一种有效的实现算法,用于显式数值积分方法,以便可以将成本相对较低的计算机用于多体车辆动力学模型的实时仿真。采用牛顿弦法求解运动方程和约束方程。制定了运动方程和约束方程,以使牛顿弦法的雅可比矩阵只需进行一次动力学分析即可。数值实验表明,在各种驾驶条件下的整个模拟过程中,初始时间生成的雅可比矩阵可用于牛顿弦的迭代。用提出的雅可比更新法对牛顿弦法进行了收敛性分析。所提出的算法可在兼容400 MHz PC的情况下实时生成原型车辆多体模型的几乎精确的解决方案。

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