为优化平衡现代装备的可靠性与测试性,提出一种考虑机内测试(BIT,Built In Test)特性的装备可靠性与测试性协同优化方法。建立了BIT特性模型、装备的可靠性模型和测试性模型;建立了以BIT数量为决策变量、装备可靠性指标最低要求为约束...为优化平衡现代装备的可靠性与测试性,提出一种考虑机内测试(BIT,Built In Test)特性的装备可靠性与测试性协同优化方法。建立了BIT特性模型、装备的可靠性模型和测试性模型;建立了以BIT数量为决策变量、装备可靠性指标最低要求为约束条件、测试性指标为优化目标的装备测试性优化模型和以BIT数量为决策变量、装备可靠性指标最低要求与测试性指标最低要求为约束条件、可靠性指标与测试性指标加权求和结果为优化目标的装备可靠性与测试性协同优化模型;通过求解模型,计算得出最佳的BIT数量、装备的可靠性指标和测试性指标。以雷达为例,给出了装备可靠性与测试性协同优化的仿真实验结果:设置BIT数量为48个时,装备可靠度为0.821,故障诊断率为88.2%,为不同装备确定合理BIT数量以达到可靠性与测试性优化平衡的目的提供了参考。展开更多
In order to research the effects of built-in test(BIT) on the system and select BITand test strategy,the complex repairable systems with BITequipment are modeled and simulated by using Simulink.Based on the model,the ...In order to research the effects of built-in test(BIT) on the system and select BITand test strategy,the complex repairable systems with BITequipment are modeled and simulated by using Simulink.Based on the model,the influences of different built-in test equipments,maintenance time and error probabilities on the system usability are evaluated.The simulation results showthat they effect on the system differently.The simulation method of complex system based on Simulink provides a technique approach to research the effects of BITon the system and select BITand test strategy.展开更多
Diagnosing intermittent fault is an important approach to reduce built-in test（BIT） false alarms. Aiming at solving the shortcoming of the present diagnostic method of intermittent fault, and according to the merit ...Diagnosing intermittent fault is an important approach to reduce built-in test（BIT） false alarms. Aiming at solving the shortcoming of the present diagnostic method of intermittent fault, and according to the merit of support vector machines （ SVM） which can be trained with a small-sample, an SVM-based diagnostic model of 3 states that include OK state, intermittent state and faulty state is presented. With the features based on the reflection coefficients of an alarm rate （ AR ） model extracted from small vibration samples, these models are trained to diagnose intermittent faults. The experimental results show that this method can diagnose multiple intermittent faults accurately with small training samples and BIT false alarms are reduced.展开更多
装备测试性工程技术起源于20世纪80年代,是先进测试技术与系统工程紧密结合的产物。该技术经过40余年的发展逐渐成熟,在测试性需求分析与分配、测试性建模与方案优化设计、机内测试(Built⁃In Test,BIT)与自动测试系统(Automatic Test Sy...装备测试性工程技术起源于20世纪80年代,是先进测试技术与系统工程紧密结合的产物。该技术经过40余年的发展逐渐成熟,在测试性需求分析与分配、测试性建模与方案优化设计、机内测试(Built⁃In Test,BIT)与自动测试系统(Automatic Test System,ATS)设计、测试性试验与评估等方面形成了较完善的理论体系,并在各型装备中得到了普遍应用,取得了较大的军事和社会效益。今后测试性基础研究和应用探索究竟该如何开展,未来发展方向是怎样的,是亟需深入探讨的问题。在对测试性工程技术的产生背景与需求、概念与内涵、发展历程、关键技术现状与新进展进行剖析的基础上,指出了目前测试性工程技术研究存在的问题和今后研究突破的方向。展开更多
文摘为优化平衡现代装备的可靠性与测试性,提出一种考虑机内测试(BIT,Built In Test)特性的装备可靠性与测试性协同优化方法。建立了BIT特性模型、装备的可靠性模型和测试性模型;建立了以BIT数量为决策变量、装备可靠性指标最低要求为约束条件、测试性指标为优化目标的装备测试性优化模型和以BIT数量为决策变量、装备可靠性指标最低要求与测试性指标最低要求为约束条件、可靠性指标与测试性指标加权求和结果为优化目标的装备可靠性与测试性协同优化模型;通过求解模型,计算得出最佳的BIT数量、装备的可靠性指标和测试性指标。以雷达为例,给出了装备可靠性与测试性协同优化的仿真实验结果:设置BIT数量为48个时,装备可靠度为0.821,故障诊断率为88.2%,为不同装备确定合理BIT数量以达到可靠性与测试性优化平衡的目的提供了参考。
文摘In order to research the effects of built-in test(BIT) on the system and select BITand test strategy,the complex repairable systems with BITequipment are modeled and simulated by using Simulink.Based on the model,the influences of different built-in test equipments,maintenance time and error probabilities on the system usability are evaluated.The simulation results showthat they effect on the system differently.The simulation method of complex system based on Simulink provides a technique approach to research the effects of BITon the system and select BITand test strategy.
文摘Diagnosing intermittent fault is an important approach to reduce built-in test（BIT） false alarms. Aiming at solving the shortcoming of the present diagnostic method of intermittent fault, and according to the merit of support vector machines （ SVM） which can be trained with a small-sample, an SVM-based diagnostic model of 3 states that include OK state, intermittent state and faulty state is presented. With the features based on the reflection coefficients of an alarm rate （ AR ） model extracted from small vibration samples, these models are trained to diagnose intermittent faults. The experimental results show that this method can diagnose multiple intermittent faults accurately with small training samples and BIT false alarms are reduced.
文摘装备测试性工程技术起源于20世纪80年代,是先进测试技术与系统工程紧密结合的产物。该技术经过40余年的发展逐渐成熟,在测试性需求分析与分配、测试性建模与方案优化设计、机内测试(Built⁃In Test,BIT)与自动测试系统(Automatic Test System,ATS)设计、测试性试验与评估等方面形成了较完善的理论体系,并在各型装备中得到了普遍应用,取得了较大的军事和社会效益。今后测试性基础研究和应用探索究竟该如何开展,未来发展方向是怎样的,是亟需深入探讨的问题。在对测试性工程技术的产生背景与需求、概念与内涵、发展历程、关键技术现状与新进展进行剖析的基础上,指出了目前测试性工程技术研究存在的问题和今后研究突破的方向。
