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A binary-working/ternary-testing (B/T for short) self-testing system is a special ternary logic system. Normally, it operates in binary mode, thus it is compatible with ordinary binary systems. The third logic value (the middle value) can be used as a fault indicating signal, or in off-line testing. B/T self-checking combinational systems have been studied in [1]. This paper extends the study to sequential systems. First, the structures of B/T R-S flip-flops,... A binary-working/ternary-testing (B/T for short) self-testing system is a special ternary logic system. Normally, it operates in binary mode, thus it is compatible with ordinary binary systems. The third logic value (the middle value) can be used as a fault indicating signal, or in off-line testing. B/T self-checking combinational systems have been studied in [1]. This paper extends the study to sequential systems. First, the structures of B/T R-S flip-flops, B/T D flip-flops and B/T J-K flip-flops are given. Then their fault characteristics are analysed. Finally, a general conclusion on B/T self-checking sequential systems is drawn. 二值工作三值检测(简称为B/T)自校验系统是一种特殊的三值逻辑系统。正常时,系统工作于二值状态,因此可与一般的二值系统兼容。其第三个逻辑值(中间逻辑值)用作故障指示信号,或在脱机测试时应用。文[1]研究了B/T自校验组合系统。本文将该研究扩展至时序系统,先逐步给出了B/T R-S、D、J-K等触发器的构成方案,分析了它们的故障特性。在此基础上得出了B/T自校验同步时序系统的一般结论。 The conception of failure detection rate in repairable systems is presented. The Markov models of k out of n : G systems considering failure detection rate are structured. State transition diagrams are also given. A simplified algorithm for transient and steady state analysis is developed. The algorithm is compared with traditional algorithm in computational complexity. Steady state analyses to some k out of n : G systems are performed. The result shows that the conception... The conception of failure detection rate in repairable systems is presented. The Markov models of k out of n : G systems considering failure detection rate are structured. State transition diagrams are also given. A simplified algorithm for transient and steady state analysis is developed. The algorithm is compared with traditional algorithm in computational complexity. Steady state analyses to some k out of n : G systems are performed. The result shows that the conception of failure detection rate is important to analyze and design complex repairable systems (particularly builtin self test systems). Finally, the relation among reliability requirement, failure detection rate and cycle time for self checking is described. 针对可修系统提出故障检测率的概念,研究了考虑故障检测率的可修k/n(G)表决系统。首先考察系统的状态转移图,建立了系统的马尔可夫模型,并进行瞬态和稳态分析,提出系统状态概率及可用度的简化算法,对简化算法与传统算法的计算复杂度作了比较。给出了几个可修k/n(G)表决系统的稳态分析结果,表明了故障检测率的概念对于分析和设计系统(尤其是自测试系统)的重要意义。最后阐明了由可靠性指标确定故障检测率、进而确定系统自检周期的方法。 This article mainly introduces the application of a settintg electronic timer in a Fuze full ballistic safety system as well as its principle and characteristics on the basis of describing several commonly adopted designing methods for it. The system has been employed by a national key product, which is characterized by being simple in circuit design, being capable of antidisturbance and facilitating the secondary integration. It is also time saving owing to the fact that the on board computer... This article mainly introduces the application of a settintg electronic timer in a Fuze full ballistic safety system as well as its principle and characteristics on the basis of describing several commonly adopted designing methods for it. The system has been employed by a national key product, which is characterized by being simple in circuit design, being capable of antidisturbance and facilitating the secondary integration. It is also time saving owing to the fact that the on board computer is to be used to do time setting. And the presence of an automatic fault self testing system makes its reliability high. 在叙述了引信全弹道安全(引信安全系统在目标区解除保险)系统几种常用设计方法的基础上,详细介绍了可装定电子定时器在引信全弹道安全系统中的应用方法及其原理和特点,本系统已在国家某重点型号中应用,其特点是:电路简单,抗干扰能力强,便于二次集成,采用弹上计算机装定定时时间,速度快,设计了故障自检测系统,可靠性高。
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