数字式舰炮交流随动系统安全保护设计

The Safety Protection Design of Digital AC Servosystem of Navy Gun

基于DSP、FPGA和CAN总线的嵌入式数字型舰炮随动系统,因"飞车"故障而导致舰炮机械限位装置等结构组件损毁。通过与模拟控制随动系统对比分析,随动控制模块与交流驱动器CAN总线通信中断是造成故障的主要原因。根据故障机理,在软件、电气、机械三层安全保护设计方案基础上,针对电气限位点,采用在随动控制模块、角度限制器和交流驱动器前端增设电气限位点,检测触点接至电源启动回路的硬件设计,在随动控制模块与交流驱动器CAN总线通信软件中增加"握手"信号的软件设计,实现了系统整体安全保护。试验结果表明,安全保护措施可靠、有效。

The devices of mechanical displacement restrictor, which belong to an embedded, digital servo-system of navy gun that based on DSP, FPGA and CAN bus, are broken-down, because of ＂incontrollable＂ fault. According to comparative analysis with simulated servosystem, the reason is communication interruption of CAN bus between control module and alternating driver. According to failure mechanism, based on safeguard design proposals of software, electricity and machine, the software design of handshaking signal is added to communication software that between control module and alternating driver. The Integral safety protection of system is realized. The subsequent trial results that the safety protection is reliable and effective.