Method of precisely calculating continuouly using time of airplane auxiliary power device through establishing dynamic model

Abstract

Through procedures of setting initial deduction coefficient, establishing attribute value of accumulating service time of auxiliary power unit (APU) and determining annual deduction coefficient etc. by using comparison and discrimination made by computer for the readings of APU timer obtained each time, the method can provide continuous APU accumulated service time, modify APU deduction coefficient, making value calculated accurate gradually. The method reduces calculating error and error of APU deduction coefficient to increase quality of monitoring APU Ensuring corrective judgment for service performance of APU and accessories.

Description

technical field [0001] The invention belongs to the field of aviation technology, in particular to a method for accurately calculating the continuous service time of an aircraft auxiliary power unit APU by establishing a dynamic model. Background technique [0002] In the maintenance process of civil aviation aircraft, it is usually necessary to know the service time of the aircraft itself and the service time of the aircraft auxiliary power unit (APU) (hereinafter referred to as APU). There is a difference between the use time of the aircraft; the use time of the aircraft itself can be calculated by calculating the flight time recorded by the pilot in the aircraft flight record book, or directly using the aircraft recorded by the aircraft data acquisition system (DFDAU) Time, the data acquisition system (DFDAU) can obtain accurate automatic record values; but it is more difficult to obtain the APU usage time. The APU usage time of the aircraft is obtained by means of the r...

AI Technical Summary

Problems solved by technology

For this reason, in the process of monitoring the use of APU and related accessories, the common practice in the civil aviation industry is to multiply the aircraft use time by a conversion factor to obtain the use time of the APU; due to the lack of complete and accurate data basis, the conversion factor is often Lack of certain science and dynamics, so that there is a large deviation between the APU conversion coefficient and the objective reality, resulting in a large error in the calculation of the APU time, affecting the quality of the monitoring of the APU and its accessories, resulting in the APU and its accessories. The misjudgment of the performance trend of the accessories and the miscalculation of the APU usage cost not only bring hidden dangers to safety, but also bring economic losses.

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