The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2025
Filed:
Oct. 12, 2024
East China Jiaotong University, Jiangxi, CN;
Chongqing University, Chongqing, CN;
Gang Li, Nanchang, CN;
Diancheng Chen, Nanchang, CN;
Ruqi Ding, Nanchang, CN;
Min Cheng, Chongqing, CN;
Liqiu Liao, Nanchang, CN;
Zhanchao He, Nanchang, CN;
Guoliang Hu, Nanchang, CN;
Qianjie Liu, Nanchang, CN;
Liping Zeng, Nanchang, CN;
EAST CHINA JIAOTONG UNIVERSITY, Nanchang, CN;
CHONGQING UNIVERSITY, Chongqing, CN;
Abstract
A method for fault diagnosis of a pressure sensor of an electro-hydraulic system with an explicit controller and an implicit controller in parallel is provided. The method may include receiving parameter information of the electro-hydraulic system; estimating a first chamber pressure of the hydraulic actuator online by utilizing a second chamber pressure of the hydraulic actuator; obtaining valve opening signals of the explicit controller and the implicit controller in a valve controller; converting the valve opening signals are difference-calculated to obtain two residual signals; and the residuals of an independent metering valveand an independent metering valveare compared with a preset threshold, respectively, to identify whether the independent metering valveand the independent metering valveare faulty or not. The method is simple to operate, has a fast response time and low cost for troubleshooting, and improves the diagnostic accuracy and coverage of the electro-hydraulic system.