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为提高遥控指令锁定电路的可靠性与安全性,结合卫星产品的研制流程与技术特性,提出一种卫星关键电路的可靠性分析流程。针对某型号遥控指令锁定电路在温度环境试验中的不稳定问题,定量分析了不同参数条件下的电路稳定性,利用电路重要参数的设计裕度范围确定了最佳的电路设计参数,保证了电路在可接受的最差应用条件下至少有67%的安全裕度。实际最坏情况下的试验表明,电路的各项参数与设计的容差范围一致,可靠性和安全性得到充分保证。
In order to improve the reliability and security of the remote control command locking circuit, a reliability analysis flow of satellite critical circuits is proposed based on the development process and technical characteristics of satellite products. Aiming at the instability of a certain type of remote control command lock circuit in temperature environment test, the circuit stability under different parameters is quantitatively analyzed. The optimal circuit design parameters are determined by the design margin range of the important parameters of the circuit to ensure that the circuit At least 67% safety margin under the worst-case acceptable conditions. The actual worst-case test shows that the circuit parameters and design tolerances consistent, reliability and safety are fully guaranteed.