Failure fault: refers to the sudden failure of the sensor measurement, the measured value is always a certain constant; the deviation fault mainly refers to a type of fault where the measured value of the sensor differs from the true value by a constant constant. As can be seen from the figure, the faulty measurement Parallel to the measurement without fault;
Drift fault: refers to a type of fault that occurs when the difference between the measured value of the sensor and the true value is increased at any time;
Decreased accuracy: It means that the measurement capability of the sensor is deteriorated and the accuracy is low. When the accuracy level is lowered, the average value of the measurement does not change, but the variance of the measurement changes.
Fixed deviation faults and drift faults are faults that are not easy to find. In the process of fault occurrence, a series of unpredictable problems will occur, which will make the control system not function properly for a long time.
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