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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。
In order to enhance the diagnosis and self-protection capability of mechanical automatic transmission (AMT) and improve the reliability of the system, the concept of system safety of the controller is proposed. Using the method of system analysis, the traditional hardware and software development of AMT controller is transformed into the design of the input processing, internal logic and control output processing of the system. Application of circuit adaptation, rapid fault diagnosis, safety redundancy, subsystem replacement, open-loop fault-tolerant control of a variety of methods, the power management module, the sensor signal processing, internal control system and actuator-driven security design to develop AMT controller with stable and controllable system, adaptive input environment, lameness and fail-safe features. The test results show that the proposed design method can improve the control performance of AMT and enhance the stability and reliability of the system.