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摘要:
A system and method of discriminating faults in an error signal, such as that from a control input sensor (34), comprises a system for and method of determining allowable limits of an error signal (102, 122, 152, 261) versus time, passing the error signal through a low-pass filter (104, 124, 154, 156, 157, 174), comparing output of the low-pass filter (104, 124, 154, 156, 157, 174) with a threshold and outputting a fault condition when the output of the low-pass filter exceeds the threshold. The time constant or constants of the low-pass filter and the threshold are selected so that a fault condition is detected when the error signal approaches the allowable limits before exceeding them.
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