Close-Loop FOG Self-Diagnosing and Application in RSDIMU
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摘要: 首先阐述了闭环干涉型光纤陀螺(I-FOG)中回路的特点,揭示了它的自诊断能力.由此给出了一种具有自诊断能力的闭环干涉型光纤陀螺并将它应用于一种容错捷联惯性测量单元(RSDIMU)中,针对该单元,设计了一种容错算法.该算法除了利用陀螺的输出外,还引入了它的自诊断信息,从而实现了仪表级的信息冗余,使这种RSDIMU的容错能力由原来的故障运行(FO)-故障运行(FO)-故障安全(FS)上升到FO-FO-FO-FO-FS.用Markov可靠性估计模型对该系统的估计表明,其可靠性也有了很大的提高.Abstract: The loop characteristic of close-loop interferometer fiber optic gyroscope(I-FOG) was studied first and its self-diagnosing capability has been reveal. A new type FOG with self-diagnosability has been gotten and used in a redundant strapdown inertial measure unit (RSDIMU), and a new fail tolerance algorithm has been designed for this unit too. In this algorithm, both the output and the state information of this FOG were induced, so that the information redundancy at the instrument grade has been realized and the fail tolerance capability was improved from fail operate(FO)-fail operate(FO)-fail safe(FS) to FO-FO-FO-FO-FS. Using Markov reliability evaluation mode, the reliability was calculated, compared with the old system, the reliability was improved greatly.
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Key words:
- fault diagnosis /
- fiber-optic gyroscopes /
- redundancy /
- nertial measure unit /
- fault-tolerance technique
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1. Matthews A. Utilization of fiber optic gyros in inertial measurement unit. Journal of the Institute of Navigation, 1990, 37(1):17~38 2. Udd E. Introduction to fiber optic gyros:10th anniversary conference. In:Udd E. Fiber optic gyros:10th anniversary conference. Denver,Colorado:SPIE-The International Society for Optical Engineering, 1986, 719:2~5 3. Wei S Y,Huddle J R. Sensor management for fault tolerant integrated inertal flight control reference and navigation system.PLAN'86-Position Location and Navigation Symposium. New York:Institute of Electrical and Electronics Engineers,1986.445~455 4. Motyka P. Reliability analysis and fault-tolerant system:development for a redundant strapdown inertial measurement unit. NASA-83-16887, 1983 -
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