System for monitoring microcomputer which calculates power steering motor angle, comprises means of detecting any difference between angular domains indicated by control and supervision signals

摘要

The angle of a power steering motor (7) is detected by a rotation sensor (11) and a microcomputer has an angle calculator (12) which uses rotation sensor data. Control signals (13) indicate which 45 degree domain the angle occupies and are fed to a comparator (16) which receives corresponding information from a supervision signal generator (15). A fault detector (17) uses the comparator output to check correct microcomputer operation An Independent claim is also included for a method of monitoring the power steering microcomputer by comparing angular domains