Actuator product acceleration factor determining method based on theoretical lifetime calculation

Abstract

The invention discloses an actuator product acceleration factor determining method based on theoretical lifetime calculation. The method comprises the specific steps that (1) conducting main mechanism analysis, wherein actuator product weak links and main mechanisms corresponding to the actuator product weak links are determined; (2) selecting lifetime calculation models, wherein the corresponding lifetime calculation models are selected according to the types of the main mechanisms; (3) comprehensively determining acceleration factors, wherein the acceleration factors, corresponding to the product weak links, of the main mechanisms under different stress levels are calculated according to the determined stress types and ranges, the acceleration stress level is determined according to the acceleration factor standard deviation minimum principle, and the acceleration factors are determined according to the acceleration factor minimum principle. The actuator product acceleration factor determining method can be directly applied to products, the acceleration factors of the products are determined through the acceleration factors of the product weak links obtained through main mechanism analysis calculation, theoretical supports are provided for a product layer acceleration lifetime test method, and the actuator product acceleration factor determining method has the advantages of being clear in thought, high in operability and the like.

Description

Technical field [0001] The invention provides a method for determining the acceleration factor of an actuator product based on life theory calculations, in particular to a method for life calculation involving different loss-type failure mechanisms and a method for determining system-level acceleration factors for long-life products, belonging to the technical field of life analysis. Background technique [0002] The actuators are the supporting equipment of the aircraft flight control system, which are used to drive the deflection of the aircraft rudder surface. Each actuator includes an integrated control valve assembly, a feedback lever assembly and two actuator assemblies. [0003] Actuators are long-life products. Accelerated life tests are often used in engineering to verify their life indicators. However, due to the high price of actuators, it is impossible to reduce the test time by increasing the test sample size. At the same time, the stresses in the working process of the...

AI Technical Summary

Problems solved by technology

[0003] The actuator is a long-life product, and its life index is often verified by accelerated life tests in engineering. However, due to the high price of the actuator, it is impossible to reduce the test time by increasing the test sample size; Its failure is the result of multiple failure mechanisms, which makes it difficult to determine the acceleration factor of the actuator product

Through the novelty search of existing technologies, there is no research on determining the acceleration factor of actuator products based on theoretical calculation of life at home and abroad.

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