Research On Fault Diagnosis Test Of Hydraulic Actuator Of Gas Turbine Control System

Gas turbines are hailed as "the jewel in the industrial crown".They are one of the few industrial products in terms of technical complexity.They are also the most difficult direction for China to develop a strong manufacturing country.With the rapid development of China’s economy and the increasing economic strength,my country has a strong demand for gas turbine localization.In the face of the difficult situation of long-term foreign monopoly in the gas turbine-related technology field,the realization of independent research and development and manufacturing of gas turbine control systems is imminent.Under the dual wave of energy transition and oil and gas market reforms,the demand for gas turbines in the gas turbine market continues to grow.Therefore,further research on the fault diagnosis of the hydraulic actuators of the gas turbine control system and improvement of control performance are more profound for my country to start a new round of gas turbine localization.The theoretical guiding significance and significant engineering value.This paper takes the gas turbine hydraulic actuator as the research object,and studies the fault sequencing,fault modeling and fault simulation in the gas turbine hydraulic actuator.The main work content and results are as follows:First,according to the actual working status of the gas turbine control system,a semi-physical test platform for fault diagnosis of the hydraulic actuator of the control system was designed and built.According to the structure and parameters of the test platform,the hydraulic actuator was designed and selected.Next,according to the working principle,the hydraulic actuator type is selected,and the mechanism modeling of each component of the hydraulic actuator is carried out through the dynamic equation theory,which lays the foundation for the simulation of the hydraulic actuator failure of the control system.Finally,the fault mechanism analysis and fault simulation are carried out for the three types of typical faults of the hydraulic actuator with higher fault sequence.The fault model is simulated through MATLAB/Simulink,and the results are compared and analyzed with the experimental results of the semi-physical platform.The accuracy of the built hydraulic actuator fault model is verified to be high,and the rapid identification of high frequency faults of the hydraulic actuator is realized.