二级摇摆伺服机构供电系统可靠性分析

Reliability analysis of DC power supply system for secondary servo mechanism

某型二级摇摆伺服机构要求在地面热试车全过程中由试验台提供稳定可靠的直流电源,原二级摇摆伺服机构供电系统为单一的整流器供电模式,试验过程完全依赖市电进行转换,没有任何其他保障措施,可靠性受到很大影响。为此,提出2种供电方案,通过比较分析系统的可靠性和可能发生的故障,最终选择了整流器和电池组相配合的供电方式。试验测试性能结果表明:这种供电方式完全满足试车任务的需求并具有较高的可靠性。

A steady DC power supply provided by test-bed is required by the secondary servo mechanism of a certain liquid rocket engine in the ground test, but the old power supply system of the original secondary servo mechanism is only made up of some silicon rectifiers, and the test process re-lies on AC electric supply to convert to DC. Therefore, the reliability of the system is affected. Two power supply plans were put forward according to the reliability analysis. After comparison, the plan combining the silicon rectifiers with battery pack was chosen to supply power to the servo mecha- nism. The testing result shows that the scheme can meet the requirements of the testing mission and is more reliable.