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针对定脉动油压调节系统，提出了利用脉动油压随机变化的力平衡残差进行故障检测的方法。建立了以压力信号为输出量的汽轮机调节系统卡涩故障模型，以卡涩故障机理模型为指导，找到了卡涩故障的特征变量———力平衡残差，分析了力平衡残差的方差随卡涩程度的变化规律：正常情况下力平衡残差方差很小；轻度、中等卡涩时力平衡残差的方差正比于卡涩程度；严重卡涩时力平衡残差的方差显著增大。基于力平衡残差的统计特征构造出了简明有效的卡涩故障检测方法。
Aiming at fixed pulsating hydraulic pressure regulating system, a method of fault detection based on stochastic variation of force balance residuals is proposed. The jamming fault model of steam turbine governing system with pressure signal as output is established. According to the jammer failure mechanism model, the characteristic variable of jamming fault is found --- force balance residual and the variance of force balance residual is analyzed With the variation of the degree of jam, the variance of the force balance residual is small under normal circumstances; the variance of the force balance residual is proportional to the degree of jam as the light and medium jam; the variance of the force balance residual is significantly increased Big. Based on the statistic characteristics of force balance residuals, a concise and effective jamming fault detection method is constructed.