摘要
针对现有运载火箭时序控制系统采用分立式电路在可靠性冗余设计中的不足,设计了一种基于固态继电器的运载火箭时序控制系统。介绍了时序控制系统原理,采用时序控制装置加电阻盒的系统方案,以固态继电器作为时序控制装置指令隔离驱动的开关执行器件,通过固态继电器开关串并联实现冗余设计,用1553B总线与箭上集中控制单元进行交互通信。时序控制装置由电源、总线通信控制、硬线控制接口和指令隔离驱动模块组成,电阻盒由电磁阀消反电动势电路和火工品限流电路组成。建立了时序控制装置自检、时序指令信号、电爆电路信号和电磁阀波形测试系统。经试验验证:系统具有高可靠性、高控制精度,满足实际工程应用要求。
Aim to the lack of redundant design for reliability in launch vehicle sequential control system existed by using discrete circuit,a sequential control system of launch vehicle based on solid state relay was designed.The principle of sequential control system was introduced.System scheme including sequential control device and resistance device was used and solid state relay was applied as switch of isolating and driving module for sequential control device.The redundant design was realized by series connection and parallel connection of solid state relay and the 1553 B bus was used for communicating with the central control unit.The sequential control device was composed of power supply module,bus communication control module,hard line control interface module and instruction isolation drive module.The resistance device included back-EMF（electromotive force）eliminated circuit and current limiting circuit.The test system of sequential control device self testing,sequential control signal,electric exploding circuit signal and electromagnetic valve was established.Experiment verification showed that the system had the advantages of high reliability and high control precision,which could meet the requirements of practical engineering applications.
出处
《上海航天》
2016年第B05期107-111,共5页
Aerospace Shanghai
关键词
运载火箭
固态继电器
时序控制
1553B总线
电阻盒
冗余设计
测试性
Launch vehicle
Solid state relay
Sequential control
1553Bbus
Sequential control
Resistance device
Redundant design
Testability
