基于嵌入式系统的自动变速器控制技术研究

【作者】 黄东风；

【导师】 常思勤；

【作者基本信息】 南京理工大学 ， 车辆工程， 2008， 硕士

【摘要】 自动变速系统的应用是车辆发展的趋势,也是提高车辆使用性能,改善车辆动力性和经济性的有效措施。自动变速器电子控制单元(TCU)是自动变速系统的主要器件,是研究开发自动变速系统的关键。本课题主要从硬件设计、软件设计以及开发手段三个方面对自动变速器电子控制单元展开了研究,基于“系统功能集成化”和“功能电路模块化”的设计思路,开发了融合AMT、CVT并兼顾AT和DCT的控制要求的适应性与扩展性较强的控制单元,控制单元具体应用可根据不同被控对象要求通过硬件模块的不同组合来实现。本文所作的研究工作主要包括:1、TCU硬件电路的模块化设计,主要包括主控单元,接口和驱动电路的设计;2、电路可靠性设计,研究如何提高系统的抗干扰能力,增强系统的稳定性;3、操作系统的选取移植,选取合适的实时操作系统,并针对所选取的处理器进行操作系统的移植;4、控制软件设计,基于所选取的实时操作系统和系统的功能要求,完成控制软件的编写;5、系统开发流程的优化,研究在TCU实测之前,在试验室条件下采用硬件在环仿真技术完成对硬件电路和控制软件调试工作,以验证硬件可靠性和软件功能性;6、针对一种无级变速器的无级变速单元完成TCU的台架试验。更多还原

【Abstract】 The application of Automatic transmission system is now one of development trends in the automobile technique, which is also an effective way to improve the vehicle’s economical and dynamic performances. TCU is the main and key device of the automation transmission system. In this paper the research work about TCU is mainly made up of three aspects including the hardware and software design and its development method. Based on the design idea of integrational system function and modular functional circuit the TCU designed in this researched can be used to control AMT, CVT, AT and DCT which is good at adaptability and expansibility. TCU can be used to control different objects by the different combination of modularized circuit.The detail of this paper includes:1. The modularization design for the hardware of TCU is carried out. It includes the design of main control unit, interface and driver circuit.2. The reliability design for circuit is researched to enhance the ability of anti-jamming and the stability of system.3. Based on the selected Micro-processor, the selection and migration of embedded real time operating system(RTOS) is accomplished.4. The control software is developed based on the selected RTOS and the functional demands of system.5. In order to optimize the development flow of TCU, in the lab the reliability of hardware circuit and the function control software is verified by making use of Hardware In the Loop Simulation(HILS) technique before the TCU is tested in the real condition.6. The bench test for TCU is finished aimed at the unit of Continuously Variable Transmission.更多还原