推进剂利用系统综合控制器嵌入式软件的容错设计

Fault-Tolerant Design of Embedded Software for Integrated Controller of Propellant Utilization System

推进剂利用系统综合控制器是某型号运载火箭推利系统的关键单机,通过采集燃料贮箱、氧化剂贮箱内液位传感器输出的液位信号和活门位移传感器输出的活门位移信号,对两种推进剂剩余量进行计算,控制调节活门开度大小,调节推进剂的混合比,最大限度地提高推进剂使用效率,以提升火箭的运载能力。作为新一代产品核心关键技术的嵌入式软件,其设计目标显然不能仅停留在满足功能需求上,而应在产品设计之初,针对各种故障模式,进行有效的容错设计,从而提升产品的可靠性。

The integrated controller for propellant utilization system is the key machine of the propellant utilization system of a certain type of rocket. In order to increase the efficiency of propellants and the launch capability of the rocket as much as possible,the remaining amounts of the two propellants are calculated by collecting the signals of the liquid level sensors in the fuel tank and the oxidant tank and the valve displacement sensor,controlling the valve opening size,and adjusting the mixing ratio of the two propellants. As the key technology of the new-generation controller,the design goal of embedded software should be more than to meet the functional requirements. At the beginning of the design,all failure modes should be considered and the efficient fault-tolerant design should be carried out so as to improve the reliability of the product.