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| | Anti-wheel-lock control system - Patent 4497026 |
 | | The changes in the speed signals are physically impossible, and the disturbances are eliminated by a circuit (15, 16, 27, 28, 29) which recognizes physically impossible changes in the wheel speed by comparing the actual speed signals with a simulation threshold at which changes in speed are physically impossible. |
 | | If such physically impossible outputs are recognized, the signal from the transducer is not applied to the wheel slip control system but, rather, inhibited, and an auxiliary signal, based on a previously measured and normal signal is, instead, connected. |
 | | The wheel speed signal, processed in block 12, is delivered continuously, but somewhat delayed, to memory element 18 which may be termed a "prior speed memory", and this value is stored unitl the appearance of the next subsequent speed value signal, so long as the error memory 17 has not been set. |
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