Starter performance detection method and apparatus of airplane auxiliary power unit (APU)

• Main Authors: DING HUIFENG, CHEN LEI, ZHONG LEI, ZHENG FENGLIANG, HUANG LEI, SHI GUOGANG, GU ZHUPING, WU JIAJU
• Format: Patent
• Language: English
• Published: 11.02.2015
• Subjects: AIRCRAFT; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSIONTRANSMISSIONS IN AIRCRAFT; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE; AVIATION; BLASTING; CHECKING-DEVICES; COMBUSTION ENGINES; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; COSMONAUTICS; EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; GENERATING RANDOM NUMBERS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS; INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04; LIGHTING; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; MECHANICAL ENGINEERING; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PARACHUTES; PERFORMING OPERATIONS; PHYSICS; REGISTERING OR INDICATING THE WORKING OF MACHINES; REGULATING; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDEDFOR; STARTING OF COMBUSTION ENGINES; TESTING; TIME OR ATTENDANCE REGISTERS; TRANSPORTING; VOTING OR LOTTERY APPARATUS; WEAPONS

The invention relates to a starter performance detection method and apparatus of an airplane auxiliary power unit (APU). The method comprises the following steps: obtaining packets related with the APU at multiple time points within a time period; according to the packets, obtaining operation parameters of an APU starter, the operation parameter comprising starting time STA; calculating an average value AVG of the starting time STA and a deviation index delta within the time period; and according to the deviation index delta, determining that the performance of the APU starter is in a stable phase, a decline phase or a fault phase.