星载图像传感器电路系统可靠性优化设计

在设计空间图像传感器电路系统时,为满足严格的可靠性指标要求,从可靠性的角度,在电路组成方案的层次上对电路系统的结构进行优化设计。设计了不同的系统搭建方案。运用概率论和布尔真值方法推导出几种方案的可靠性模型,并总结出其变化规律。根据采用的元器件信息,分别计算各方案具体可靠度值。为更加科学、合理地反映系统在实际工作时的失效情况,提出了综合失效率的概念,并给出具体数学定义。通过对系统失效率、器件数量、工程复杂性以及占用空间的大小进行比较,衡量各方案的优劣,为空间传感器电路系统方案设计提供数值依据和优化方法,提高了系统的可靠性,对航天产品电子系统设计具有一定的参考价值。

Reliability optimal design of aerospace image sensor circuit system

When designing a space image sensor circuit system, in order to meet stringent reliability requirements, optimization design of the circuit system has been done. Different system schemes are designed. Reliability models of these designs are built using probability theory and Boolean truth method and then discussed. Specific reliability value calculation is performed respectively. To reflecting the failure situation of system more scientifically and rationally, the concept of comprehensive failure rate is proposed and its mathematical definition is given. By comparing the failure rate, number of devices in the system, project complexity and space, the pros and cons of the various schemes are evaluated. It provides the basis for space sensor systems design and effective methods of optimization, improves the reliability of the system. This approach is a good reference for the aerospace electronic systems design.