In order to identify the fault of hydraulic rotary drilling rig buffer balance valve with accuracy and efficiency,a fault diagnosis method of hydraulic rotary drilling rig buffer balance valve based on T-S fuzzy fault tree analysis is proposed.The structure of the buffer balance valve of the hydraulic rotary drilling rig is analyzed,the kinematics equation is established,and the motion characteristics of the rotary drilling rig are analyzed.T-S fuzzy gate is designed.According to the on-site fault data of buffer balance valve of hydraulic rotary drilling rig and expert experience,T-S fuzzy fault tree analysis is established based on the dynamic characteristics of rotary drilling of balance valve,and the abnormal status of buffer valve is regarded as the top event of the fault tree analysis.The T-S model is applied to obtain the fault severity of the fault event and achieve fault diagnosis of the buffer balance valve of the hydraulic rotary drilling rig.The experimental results show that the proposed method has high diagnostic efficiency and accuracy.
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