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针对红外地球敏感器受其寿命影响未能进行寿命验证,通过进行可靠性分析,确定了薄弱环节,设计了寿命试验,开展了地面试验验证.寿命试验采取实时寿命试验和进程加速寿命试验相结合的方法,模拟在轨工作环境,考核产品的实际工作寿命,对极端工况下(寿命末期产品密封功能失效)试验件的运转性能及失效模式进行摸底.分析了寿命试验关键参数和极端工况下试验件轴系运转测试数据,数据表明试验件工作正常,已运行在稳定工作期.由可靠性分析和寿命试验数据可以得出:目标飞行器红外地球敏感器实际寿命相对3年寿命要求有较大的裕量,寿命试验的开展可以进一步验证产品实际寿命.
According to the fact that the life of the infrared earth sensor is not validated by its life, the reliability is analyzed to determine the weak link, the life test is designed and the ground test is carried out.The life test adopts the combination of real-time life test and accelerated life test , Simulating on-orbit working environment, examining the actual working life of the product, and thoroughly examining the running performance and failure modes of the test piece under the extreme conditions (the end-of-life product sealing failure) .The key parameters of the life test and the extreme working conditions Under the test shaft running test data, the data show that the test piece is working properly, has been running in a stable working period by the reliability analysis and life test data can be drawn: the target aircraft infrared earth sensor life expectancy relative to 3 years life expectancy Large margin, life test carried out to further verify the actual life of the product.