引信起爆控制电路冗余设计技术研究

引信起爆控制电路通过对目标探测信号的处理和决策,给出发火控制信号,其可靠性直接决定了其发火可靠度,工程上大多采用直接双套并联方式进行冗余设计。针对引信起爆控制电路如何进行冗余设计问题,设计了并联冗余和非冗余两种电路,采用数理统计的方法计算了其全寿命周期可靠度,结果表明非冗余电路可靠度略高于并联冗余电路。采用故障物理方法,分别通过加速寿命试验和故障物理仿真,得出了起爆控制电路在引信服役期内的温度应力、力学环境应力、电应力下的失效寿命远大于寿命期的结论。综合数理统计和故障物理研究结果,给出了引信起爆控制电路可采用非冗余设计的建议。

Research on Redundancy Design of Fuze Fire Control Circuit

The target signal was processed by the fuze fire control unit,redundant circuit is often used to achieve high reliability.To get a more reliable fuze fire control circuit,parallel redundancy and non-redundant design schemes are studied.Life cycle reliabilities of two schemes are calculated by statistics approach,which mean that the reliability of non-redundant circuit is better than the redundant one.With the measures of physics of accelerated life test and failure simulation,time-to-failure of fuze fire control circuit is calculated under synthetical stresses of thermal,mechanics and and electronic.The calculation results show that the time-to-failure of the circuit is much more than the given index,and the scheme of non-redundant is feasible and effective.