2017年第2期
文章编号：10094687(2017)02000106
车辆与动力技术 Vehicle & Power Technology
总第146期
基于STM32的自由活塞内燃发电机电控系统设计
何谦益，左正兴，冯慧华，李龙，郭宇耀
（北京理工大学机械与车辆学院，北京100081）
摘要：围绕STM32F407设计了符合自由活塞内燃发电机控制需求的电控系统，并匹配设计了对应软件．从样机结构特点、运行特点人手，分析了控制系统具体功能与需求，提出STM32与FPGA联合控制的总体方案，并介绍了处理器单元模块、数据采集模块、驱动模块以及通信模块的硬件设计．提出通过运行速度调整后续控制参数的控制策略并进行仿真，使用软件分层设计思想以及前沿工具STM32CubeMX进行ECU软件开发．最后试验验证了ECU与PC之间审口通信的实现
关键调：自由活塞内燃发电机；电控系统；串口通信
中图分类号：TK441
文献标识码：A
Electronic Control SystemDesign of theFree-PistonEngine
GeneratorbasedonSTM32 ZUOZheng-xing,
HEQian-yi，
FENGHui-hua，
LI Long，
GUOYu-yao
(School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China)
Abstract:Based on the STM32F407, an electronic control unit (ECU) and its corresponding software were designed for its electronic control system of a Free-Piston Engine Generator (FPEG). According to the features of the prototype in its structure and operation modes, the specific functions and requirements of the system were analyzed and a general control scheme was proposed of combining the STM32 with the FPCA. The hardware design of such modules of the system was introduced as a processor, a data acquisition, a driver and a communication. The strategy of adjusting the subsequent control parameters was proposed based on the operation speed, and the simulation was conducted. By means of the layered structure design concept, the ECU software was developed with an advanced tool, STM32CubeMX. The feasibility and robustness of the serial communication is verified between the ECU and the principal computer.
Key words: free-piston engine generator; electronic control system; serial communication
自由活塞内燃发电机（Free-pistonEngine Generator，简称FPEG）是由自由活塞内燃发动机与直线电机耦合而成的一种新型能量转换装置得益于其结构的特殊性，具有传递路径短、结构紧漆等优点，应用前景广阔[1-3]．但也因其唯一运动部件活塞组件不受机械限制，没有固定的上下止点，给整机控制带来了很大困难。机器运动规律完全取
收稿日期：2016-12-16
决于其受力状态，因此，在压缩冲程中施加给活塞组件的能量要恰好使活塞完成压缩冲程，能量过多将活塞位移过度，甚至损坏发动机，能量不足将导致发动机失火．所以控制问题是关乎自由活塞内燃发电机稳定运行的核心问题(4].
现阶段对FPEG控制方面的研究成果大多停留在控制策略层面38），虽然有少数研究人员对控制
作者简介：何谦益（1991-），男，硕士，研究方向为发动机电子控制万方数据