Method for predicting remaining life of aviation storage battery in discontinuous working mode

Abstract

The invention discloses a method for predicting the remaining life of an aviation storage battery in a discontinuous working mode, and the method comprises the specific steps: 1, collecting a state signal of the storage battery, and calculating the ratio (SOH) of the actual capacity to the nominal capacity of the storage battery; 2, respectively establishing storage battery performance degradationmodels in the operation mode and the non-operation mode, and predicting SOH based on volume particle filtering; 3, if the storage battery is always in the running mode, predicting SOH of the storagebattery according to the step 2; if the battery is in a non-operational mode in the future, and when the storage battery is predicted not to fail when the storage battery is switched into the non-operation mode, acquiring an SOH value during next operation according to the duration of the non-operation mode and the performance degradation model, if the SOH value exceeds a failure threshold, indicating that the storage battery fails within the non-operation time, and otherwise, switching to the step 2. According to the method, a self-adaptive variable structure residual life prediction model isestablished for the discontinuous working characteristic of the storage battery, so that the problem of predicting the residual life of the storage battery working in a continuous-discrete state canbe effectively solved.

Description

technical field [0001] The invention relates to a method for predicting the remaining life of an aviation accumulator in a discontinuous working mode, belonging to the field of reliability evaluation and fault prediction. Background technique [0002] As the emergency and auxiliary power supply of the aircraft, the aviation battery is an important part of the aviation power system. It is used to start the aircraft engine or the auxiliary power unit (Auxiliary Power Unit, APU), and to the important flight instrument and navigation and other equipment to ensure safe flight and landing of the aircraft. Therefore, the aviation battery is not only a functional component of the aircraft, but also an important support component. Its reliability, testability and maintainability are directly related to the startup of the aircraft, emergency power supply and even the success or failure of the flight mission. However, the long-term operation of aviation batteries in complex and harsh ...

AI Technical Summary

Problems solved by technology

However, the aviation battery is often in a discontinuous working state in actual work, that is, when the aircraft is performing flight missions, the aviation battery works normally, and when the aircraft is grounded, the aviation battery is in a non-operating mode, and the performance of the battery is still slowly degrading. However, it is quite different from the performance degradation during operation, and the battery is subjected to harsh environmental stress and working stress in the working mode, and its performance degradation law is time-varying and nonlinear. The existing remaining life based on a single structure Forecasting methods are not available for the above working states

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