| 摘要 |
<p>The invention relates to a method for supervising the correct function of a periodically modulated sensor (110) controlling the position of a rotating system, said method comprising the steps of a) determining a response g i †’ = g c �¢ i �¢ g s �¢ i of the periodically modulated sensor (110), b) determining the inverse K=W -1 of a 2x2 matrix W describing gains and rotations induced by a digital signal processing routine applied to the raw sensor data to extract the position data, c) determining the complex number m=m cos +im sin obtained by processing a raw sensor data value a i corresponding to a first position of the rotating system with the digital signal processing routine, d) calculating an estimate a' i for the next raw sensor data value a i+1 based on the formula a' i = g i K m , where m †’ = m cos m sin , and e) comparing the estimate and the next raw sensor data and creating an alert if the result of this comparison exceeds a predetermined value and Controller device (100) for performing the method according to one of claims 1 to 5, said controller device (100) comprising a periodically modulated sensor (110), a signal generator (120) for providing periodic excitation functions for the periodically modulated sensor (110) and a data processing device (130) for performing a discrete Fourier transform on data provided by the sensor and for filtering of data provided by the periodically modulated sensor (110) which further comprises an estimator device (140) for calculating an estimate a' i for the next raw sensor data value a i+1 using the method of this invention.</p> |
