27 December 2001 Self-validating sensors with application to a flexible link control system
Author Affiliations +
Proceedings Volume 4563, Sensors and Controls for Intelligent Manufacturing II; (2001); doi: 10.1117/12.452651
Event: Intelligent Systems and Advanced Manufacturing, 2001, Boston, MA, United States
Abstract
For the satisfying performance of a control system, design of a controller for the system which meets the required specifications, and the role of its supporting hardware that keeps functioning are equally important. Therefore it is inevitable to keep track of accurate and reliable sensor readings for good controller performance. Among the hardware of a control system sensors are most vulnerable to malfunction. Thus it is necessary to provide physical and analytical redundancy for the sensor measurement outputs to increase reliability against sensor failures. In general the task of detection, identification, and accommodation of sensor failures is widely pursued for this need. In case of sensor faults, they are detected by examining the sensor output values and the correlated or relevant values of the system. And then the types of the faults are identified by the analysis of symptoms of faults. If necessary self-validating sensor values are synthesized according to the types of faults, and then they are used for the controller instead of the raw data. In this paper, a self-validating sensor is applied to the control of a flexible link system with the sensor fault problems in the light sensor module for exact positioning to show the applicability. It is shown that the digital controller can provide a satisfactory loop performance even when the sensor faults occur.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Seung You Na, Heyoung Lee, Chang-Doo Kee, "Self-validating sensors with application to a flexible link control system", Proc. SPIE 4563, Sensors and Controls for Intelligent Manufacturing II, (27 December 2001); doi: 10.1117/12.452651; http://dx.doi.org/10.1117/12.452651
PROCEEDINGS
8 PAGES


SHARE
KEYWORDS
Sensors

Control systems

Control systems design

Cameras

Lamps

Light sources

Optical sensors

RELATED CONTENT

Stereo vision based 3D game interface
Proceedings of SPIE (October 30 2009)
Silicon and nitride FETs for THz sensing
Proceedings of SPIE (May 13 2011)
Large, thin, flexible, and low-cost light emitting surfaces
Proceedings of SPIE (September 14 2007)

Back to Top