Efficient Computer Simulation Program for a General Class of Mechanical Systems

现有的计算机程序模拟的运动， 多体机械系统通常需要过多的 实际系统的执行时间，这使得他们没有 适合或不方便在设计阶段使用。 此外，本发明还 这些程序没有很好的规定， 通常涉及平面连杆或齿轮传动的子系统 机制等 一种动态配方方法， 认识到大量的机械系统可以 被建模为由开环链或主体树组成， 它们是系统的主要环节， 子系统，它们与主链路一起总是形成 局部闭合运动学回路 拟议的研究是 制定这样一种方法，要求确定 局部闭环独立广义坐标 通过图形表示概念和运动学分析， 使用有效的递归形式主义的主链或 树和其他贡献的推导 局部闭合回路 预计将有一个用户友好和 计算效率高的程序可以从这项研究中发展出来 并且可以使其在商业上对公众可用。 的 由此产生的程序可以使机械系统设计人员， 在各个设计阶段进行有效的模拟， 减少设计周转时间和设计成本， 提高设计质量。

The existing computer programs for simulation of the motion of multi-body mechanical systems generally require excessive execution time for realistic systems and this renders them not suitable or inconvenient for use in design phase. Additionally, these programs do not have good provisions for common drive subsystems which often involve planar linkages or geared mechanisms. A dynamic formulation methodology based on the recognition that a large number of mechanical system can be modeled as consisting of an open loop chain or tree of bodies, which are the primary links of the system, and their drive subsystems, which together with the primary links always form local closed kinematic loops. The proposed research is to develop such a methodology that calls for the identification of independent generalized coordinates for the local closed loop through graph representation concept and kinematic analysis, the use of efficient recursive formalism for the primary chain or tree and the derivation of additional contributions from the local closed loops. It is anticipated that a user-friendly and computationally efficient program can evolve from this research and can be made commercially available to the public. The resulted program can enable mechanical system designers to perform effective simulation in the various design phases to reduce the design turn-around time and the design costs, and to improve the quality of design.