Inertial measurement unit fault prediction method based on confidence rule base

• Main Authors: HE WEI, CHEN MANLIN, HU GUANYU, TANG SHUAIWEN, CHEN LEIYU, ZHOU ZHIJIE, DONG XINHAO, CAO YOU, HU CHANGHUA
• Format: Patent
• Language: Chinese; English
• Published: 09.06.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; GYROSCOPIC INSTRUMENTS; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; SURVEYING; TESTING

An inertial measurement unit fault prediction method based on a confidence rule base belongs to the field of fault prediction of inertial navigation devices, and is characterized by comprising the following steps: establishing a confidence rule base model taking accumulated pulse quantity in unit time as input and navigation errors as output through static test of a laser inertial measurement unit; and then reflecting the fault state of the laser inertial measurement unit by using the navigation error in unit time, setting a fault threshold of navigation precision, reflecting the fault state of the laser inertial measurement unit, and realizing fault prediction of the laser inertial measurement unit. According to the inertial measurement unit fault prediction method based on the confidencerule base, navigation error prediction is achieved through pulse data of a laser inertial measurement unit; the expert system based on the confidence rule base can effectively process various information with uncertainty, an