Method and device for detecting and indentifying sensor errors

Abstract

Abstract A method for detecting and identifying errors in sensors for state variables which are linked to measurement variables, directly supplied by the sensors, by means of a measurement equation m = Hx + omega , where m is a vector of the measurement variables, x is a vector of the state variables and H is the measuring matrix and the order of m is greater than the order of x, contains the following method steps: a) Determination of validation vectors vi as column vectors of a matrix P = [v1v2...vn] b) determination of a parity vector v as element of a parity space which is the orthogonal complement of the signal space as linear combination of the validation vectors with the associated elements m of the measurement vector m: <IMAGE> c) formation of a detection function DF = <vv> as a scalar product of the parity vector by itself and check whether this detection function is greater than or less than a predetermined limit value, the transgression of this limit value signalling the existence of an error, d) in the presence of an error, calculation of locating functions from the components of the parity vector and determination of the maximum locating function from which the faulty sensor can be derived e) reconfiguration of the sensor signals, taking into consideration the error status thus determined.

Inventors

• 👤 Uwe Krogmann

Bibliographic Details