Sensor Fault-Tolerant Control Method Applied to a Winding Machine

Abstract

This paper describes a sensor fault-tolerant control method. Automated systems are often subject to sensor faults and/or failures. In closed-loop systems, bad information issued from a faulty sensor may lead to a loss in the products quality, or even to machines breakdown. The principle of this method consists of compensating the sensor fault by preventing the control law from reacting when this fault occurs. It is based on the fault magnitude estimation, and on the annihilation of the fault effect on the system control inputs. An application to a winding machine illustrates the method abilities in case of a sensor bias, a drift, and a total loss of a sensor.