Fault detection and isolation system and method

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle diagnosis or maintenance indication

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C701S033000

Reexamination Certificate

active

06687585

ABSTRACT:

This application claims the benefit of U.S. Provisional Patent Application No. 60/247, 849, entitled FAULT DETECTION AND ISOLATION SYSTEM AND METHOD and filed Nov. 9, 2000.
TECHNICAL FIELD
The present invention is in the field of vehicle control system design. More particularly, the present invention is a model-based fault detection and fault diagnosis system and method for monitoring overall vehicle system performance.
BACKGROUND AND SUMMARY OF THE INVENTION
In recent years, increasing interest and requirement for improved vehicle performance, reliability, and safety has focused attention on the use of Fault Detection & Isolation (FDI) when designing vehicle control systems. Fault detection and isolation is becoming one of the most important aspects in vehicle system control design. In order to meet the increasing demand for better performance and reliability, model-based FDI schemes are being developed to address complete vehicle systems, to detect faults in sensors and actuators, and to apply appropriate corrective action without adding new hardware to the vehicle. However, the high complexity of most vehicle systems makes the standard FDI model-based technique difficult to apply without unacceptable computational effort.
The present invention is a novel system and method based on a hierarchical structure of the FDI scheme that reduces the computational effort of prior art systems. The FDI scheme uses the available sensors in a vehicle system and divides them into subsystems of smaller dimensions containing one or more modules that are related or interconnected. The same module may appear in a different subsystem, but the set of all subsystems does not have to contain all of the modules. For this structure, an FDI scheme comprising several detector units is created. Each detector unit receives information from the sensors and outputs a residual that is sent to a high-level detector unit which processes the data and performs the residual evaluation for the selected subsystem. Finally, each subsystem outputs a decision that is sent to a supervisor hazard detector performing the final diagnosis.


REFERENCES:
patent: 5481906 (1996-01-01), Nagayoshi et al.
patent: 5726541 (1998-03-01), Glenn et al.
patent: 5796990 (1998-08-01), Erle et al.
patent: 6014598 (2000-01-01), Duyar et al.
patent: 6117180 (2000-09-01), Dave et al.
patent: 6119111 (2000-09-01), Gross et al.
patent: 6144904 (2000-11-01), Tseng
patent: 6223104 (2001-04-01), Kamen et al.
patent: 6256594 (2001-07-01), Yamamoto et al.
patent: 6434512 (2002-08-01), Discenzo
patent: 6470300 (2002-10-01), Benzinger et al.
Singer et al., A fault-tolerant sensory diagnostic system for intelligent vehicle application; Intelligent Vehicle '95 Symposium; IEEE: Sep. 1995; pp. 176-182.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Fault detection and isolation system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fault detection and isolation system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fault detection and isolation system and method will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3342817

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.