In this paper, on the basis of the structure features of the transmission system. The failure mechanism of the transmission system is researched. The theory of fuzzy mathematics is applied in diagnosing fault system of self-propelled multiple rocket launcher and mathematics models are adopted to solve fuzzy fault diagnosing problems, to work out fuzzy theory and fuzzy relation matrix and fault diagnosing system with computer assistance. By the application of the system, once fault are found in the rocket launcher during training or battle, the communication between the person and computer can be done and computer judgment can be made. In this way, faults can be removed quickly step by step through fault removal demonstration by computer. If this system is adopted by our army, not only can technical support capability be improved greatly, but also promote the fighting force of artillery troops.
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