ABNORMALITY DETECTION METHOD, ABNORMALITY DETECTOR USED FOR THE METHOD, AND CONTROL SYTSEM USING THE DETECTOR

摘要

PPROBLEM TO BE SOLVED: To provide an abnormality detection method capable of precisely detecting an abnormality signal of a state value. PSOLUTION: In the detection of a state value abnormal vibration H in which the state value X vibrationally fluctuates with a large amplitude around a normal stable value gs', the average value or integrated value within the latest set time T' of a value showing the magnitude of the deviation Δg between the measurement value g and stable value gs' of the state value X is taken as a determination value K, and the state value abnormal vibration H is determined based on the comparison of the determination value K with a set threshold Ks. Preferably, the average value within the latest set time T of the measurement value g is taken as the stable value gs. PCOPYRIGHT: (C)2004,JPO