基于问答驱动迭代的工程车辆仿真设计方法研究

Research on Simulation Method in Construction Vehicle Design Based on an Iterative Question-answer Driven Process

为了实现基于问答驱动迭代的复杂产品的仿真设计,提出了一种在过程设计中,将制定问题、行为模型、仿真模型和决策依据作为独立对象来建立过程模型的方法。该方法能确保需求规范的属性与预估产品的属性之间的信息粒度级别,并使其达到对象到对象层面的可追溯性。将该方法应用于大型液压挖掘机工作装置铰接点的优化设计,以工作装置的工作范围最大和在挖掘、举升、平推等典型工况下的工作性能最佳为原则,对按照蒙特卡罗方法生成的5120组不同的工作装置铰接点设计方案进行了选优。结果表明,该方法设计的工作装置性能优良,满足设计需求,是进行复杂产品过程建模的一种切实可行的方法。

In order to support a question-answer driven simulation process,a design process model was introduced, that was capable to describe problem statements, model specifications, simulation models and problem answers as separate objects. This enabled a granularity level of information that allowed traceability on an object-to-object level between the attributes in the requirement specifica- tions and the estimated product properties. A methodology for an iterative question driven simulation process using this design process model was illustrated in a modeling and simulation scenario of an at- tachment in a large hydraulic excavators. The simulation model produced a number of 5120 different hinge point design programs according to Monte Carlo methods. Based on the principle of the large working range, the best working performance under lifting, digging and horizontal pushing operating conditions,the best hinge point design was chosen. The results demonstrate that it is a practical valid method for process modeling of complex products, and it can meet the design requirements and has excellent performance design program for the hydraulic excavator attachment.