关于车型迭代系统的研究与应用

随着国内乘用车市场的快速发展,用户对产品要求不断提高,而且技术和法规不断升级,新款车型的推出速度越来越快。对于用户来说,市场推出新车型能够不断地刺激消费欲望,为市场带来更新的技术,更优秀的造型,更好的性能。然而,新老车型在迭代的过程中,主机厂在如何整合上游供应链及下游销售链,合理控制老款车型产量、零部件库存、零部件断点、新车型零部件备库、新车型生产及爬坡等一系列工作上仍然面临挑战。本文探讨在车型迭代过程中,如何结合整车销量预测、生产产能规划、零部件库存等情况,制定合理的车型迭代策略,平衡产销需求和零部件备库,抑制市场变化和波动对供应链造成的牛鞭效应,从而降低供应链零部件的呆滞损失。

快速迭代车型开发的研究与实践

本研究主要对快速迭代车型开发的特点、更改范围,以及产品开发过程中的关键过程进行研究,对其边界条件进行分析、探讨及定义。文中重点阐述快速迭代车型开发在造型设计、总体设计、结构设计、样车制造、设计验证及OTS认可、整车标定等方面与全新车型开发在实施要求上的差异。探索和完善项目实战经验,优化项目管理模式,为短周期车型开发提供借鉴方法,提升研发效率和研发质量。

Bi-level model for shared parking decision-making based on parking lot assignment simulation

In order to carry out comprehensive decision-making of multi-class shared parking measures within a region, a bilevel model assisting decision-making is proposed. The upper level selects parkers＇ average satisfaction and the violation rate during peak hours as indices in object function, and sets probability distribution models describing dynamic parking demand of each site, the feasibility of shared parking scenarios and occupancy requirements during peak hours of each parking lot as restrictions. The simulation model in the lower level sets up rules to assign each parker in the random parking demand series to the proper parking lot. An iterative method is proposed to confirm the state of each parking lot at the start of formal simulations. Besides, two patterns linking initialization and formal simulation are presented to acquire multiple solutions. The results of the numerical examples indicate the effectiveness of the model and solution methods.