Accelerated Life Model of Weak Components of Electronic Fuze under Multiple Stresses
The work aims to present the life distribution law of an electronic time fuze under the sea island environment and study the location of the weak components of the fuze and the factors affecting the life of the fuze.The weak components of the fuze were initially screened out through the working principle of the fuze,and the environmental factors affecting the reliability of the fuze storage in the sea island environment were analyzed.An accelerated test was designed according to the sensitive en-vironmental stress of the fuze to verify the location of the weak components.A multi-stress accelerated model combining corro-sion kinetics model and Peck model was proposed,and the unknown parameters of the model were estimated by the accelerated test results,thereby obtaining the life distribution law of the fuze.Finally,the life of the fuze in the sea island storage environ-ment was predicted by the accelerated model.The constant temperature,humidity and salt spray accelerated test results were used to accelerate the results,and the weak components of the fuze were identified as the electronic switching devices in the cir-circuit and the time setting ring.The life distribution law of the fuze obeyed the Weibull distribution function.The accelerated model combining the corrosion kinetics and humidity accelerated model could predict the storage life of the fuse in the sea is-land environment to be 10.13 a with a prediction accuracy of 1.3%.The multi-stress acceleration test is more consistent with the actual storage environment of the fuze,and the acceleration model based on wet thermal stress and salt spray stress can accurately predict the storage life of the fuze under the impact of multiple stresses in island environment.
fuzeaccelerated life modelweak componentslife predictionmultiple stressesisland environment
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