【作者】 陈清洪；

【导师】 秦大同；

【作者基本信息】 重庆大学 ， 机械设计及理论， 2010， 博士

【摘要】 AMT/DCT自动变速器通用开发关键控制技术研究,是为了构建一个开发AMT/DCT变速器的通用开发平台,缩短自动变速器研发周期、节约研发成本而开展的一项研究工作。论文从开发AMT/DCT自动变速器通用开发平台控制系统的几个关键问题入手,研究AMT/DCT自动变速器的起步离合器滑摩控制、换挡离合器滑摩控制、挡位决策控制、与发动机的综合控制等共性问题,以实现开发平台综合控制系统的通用化或部分通用化。论文主要研究了以下几个方面的内容:(1)起步离合器控制,是AMT/DCT自动变速器开发的关键技术之一。论文研究了AMT起步离合器最优滑摩控制,建立了AMT起步离合器的系统动力学模型,采用最优控制方法研究了离合器从动盘的压力控制;研究了DCT单离合器起步最优滑摩控制,采用离合器从动盘的最优压力控制来实现起步离合器的最优滑摩控制;研究了DCT双离合器主、辅起步离合器最优滑摩控制,建立了双离合器起步控制的动力学模型,采用最优压力控制实现了起步离合器的滑摩控制;在此基础上,提出了这几种起步离合器实现通用控制的思路,建立了起步离合器通用控制系统的动力学模型,分析了不同起步离合器的各自的特殊性,通过判断起步离合器类型,分别计算不同类型起步离合器的半接合点、动力分配、冲击度约束等,采用统一的最优控制方法实现不同类型起步离合器的滑摩控制,通过模块化的方式实现起步离合器控制的通用化。(2)换挡离合器控制,是AMT/DCT自动变速器开发的又一关键问题。论文研究了AMT汽车换挡离合器的控制问题,建立了系统动力学模型,在满足乘坐舒适性的前提下,使换挡离合器滑摩阶段的滑摩功最小,并用最优控制来实现离合器换挡时的滑摩最优压力控制;研究了DCT换挡离合器最优滑摩控制,建立了DCT换挡离合器滑摩控制动力学方程,采用最优压力控制实现了换挡离合器控制;在研究AMT/DCT换挡离合器控制的基础上,分析了两种换挡离合器控制的特点,通过辨识离合器控制的类型,分别处理不同离合器的特殊性,采用统一的最优控制的方法来实现不同换挡离合器的滑摩控制,通过模块化的方式实现换挡离合器控制的通用化。(3)自动变速器挡位决策,是AMT/DCT自动变速器控制的另一关键技术。论文分别研究了自动变速器的模糊挡位决策方法、神经网络挡位决策方法、动态模糊神经网络挡位决策方法,分别研究了这三种挡位决策方法的模型和算法,并给出了仿真结果,对AMT和DCT自动变速器,这些挡位决策方法具有通用性。(4)为了提高汽车动力传动系统的综合性能,必须实现发动机与变速器的综合控制。论文建立了发动机的神经网络模型,以克服发动机建模困难的问题,提高发动机模型的辨识精度,针对控制中发动机动力响应滞后的问题,采用预测控制的方法实现对发动机油门开度的超前调节,以更好地满足动力传动系统的动力需求。更多还原

【Abstract】 In order to construct a universal development platform of AMT/DCT transmission exploitation, reduce the research and empolder period, and saving empolder spending, the key technology of AMT/DCT automatic transmission universal development is researched.The thesis start with several key issues about the development of AMT/DCT automatic transmission control system of universal development platform, researched the common problem of AMT/DCT automatic transmission, had the integrated control system of development platform acieve generalization or part generalization. The thesises have researched following aspects.(1) The start-up clutch control is one of the key problems of AMT/DCT automatic transmissions develop. The optimal control of start-up clutch slip is researched, dynamic model of start-up clutch of AMT vehicle is set up, and realize pressure of clutch optimal; Optimal control of one clutch slip start-up of DCT is researched, it’s dynamic model is similarity to AMT strat-up clutch, used optimal press control of driven plate of clutch, realized optimal slip control of start-up clutch; reaserched the main and auxiliary clutch optimal slip start-up control of DCT, the dynamic model of two clutch start-up is established, optimal slip control realized by use optimal press control; based on these research, universal control of several start-up clutch is researched, the universal dynamic model of start-up clutch control system is established, the particularity of different start-up clutch is analysised, distiniguish these different by software control method, at last, start-up clutch universal control of uniform optimal control is realized. A uniform method of optimal control are used for different types of starting clutch slip control, universal starting clutches control are achieved through the modular method.(2) The clutch of shift control, wich is an other key problems of automatic transmissions develop. The questions of AMT vehicle clutch shift gear control is studied, the dynamic model of clutch system been set up, in the conditions of shock intensities meet driver comfort, have slip work least, Realize optimal press control of clutch starting with optimal control method. the shift clutches of DCT is also researched based on Optimal control, slip control dynamic function of shift clutch of DCT is set up, realized the gear shift clutch control used optimal press control. Based on the front research of two types shift gear clutch control, analysed the characteristic of the two clutch control, identification the type of clutch through software, then specifical problem of different type clutch is process individually, A uniform method of optimal control are used for different types of shifting clutch slip control, universal shifting clutches control are achieved through the modular method.(3) Gear shift strategies of step speed automatic transmission is also one of the key problems, fuzzy control method shift strategy, neural networks control method shift strategy and dynamic fuzzy neural networks control method shift strategy have respectively researched in gear shift, to step speed automatic transmissions, the dynamic fuzzy neural networks control method have generality.(4) In order to improve the overall performance of automotive powertrain, engine and transmission must implement a comperehensive control. Modeling based on neural networks is researched to avoid the difficult of engine model, improve the accuracy of the engine model. Take into account the problem of dynamic response delay, predictive control method is uaed to adjust the throttle in advance, meet the dynamical need of powertrain in real time.更多还原