AMT控制器的系统安全性设计

System safety design of an AMT control unit

为增强机械式自动变速器(AMT)的诊断和自保护能力,提高系统的可靠性,提出了控制器的系统安全性概念。采用系统分析方法,将传统的AMT控制器软硬件开发转化为对系统的输入处理、内部逻辑和控制输出处理3部分的设计。应用电路自适应、故障快速诊断、安全冗余、子系统替换、开环容错控制多种方法,对电源管理模块、传感器信号处理、系统内部控制和执行机构驱动进行了安全性设计,从而开发出了具有系统稳定可控、输入环境自适应、跛行和失效保护特性的AMT控制器。测试结果表明,所提出的设计方法能改善AMT的控制性能,增强系统的稳定性和可靠性。

To enhance the diagnostic and self-protected ability of automated mechanical transmission（AMT）,and to improve the system reliability,this paper proposes a concept of the controller system safety.By way of system analysis method,the traditional development of hardware and software is changed to the design of system input,internal logic and output.The methods of circuit adaptive,fault rapid diagnosis,safety redundancy,sub-system replacement and open-loop fault-tolerant control were used to design the power management module,sensor signal processing,system internal control unit and actuators＇ driver,with an AMT controller developed,which is stable and controllable,adaptive to input environment and has limp-home and fail-safe characteristic.Laboratory experiments and road tests proved that the proposed design methods can improve the control performance of AMT and enhance the whole system stability and reliability.