Fault diagnosis method for electric actuator of gas turbine

Abstract

The invention discloses a fault diagnosis method for an electric actuator of a gas turbine, and belongs to the technical field of fault diagnosis of gas turbines. Comprising the following steps: step 1, carrying out standardized preprocessing on an acquired flow signal sample; 2, working condition identification and preliminary clustering are carried out on the data set in the step 1, and then a Gaussian probability density function model is trained; 3, constructing a self-learning network model, training the self-learning network model, extracting data features of the traffic signal samples, and storing network weights of the self-learning network model; 4, constructing a state classification and recognition network model of the electric actuator, and loading network weight parameters; and 5, carrying out fine adjustment on the network weight of the GMM-1DCNN of the electric actuator. The method has strong advantages in the aspects of diagnosis precision and diagnosis efficiency, and avoids the defects of large data processing workload, difficulty in effective feature extraction and the like caused by direct data processing.

Description

technical field [0001] The invention relates to the technical field of gas turbine fault diagnosis, in particular to a fault diagnosis method for an electric actuator of a gas turbine. Background technique [0002] A gas turbine is an efficient and complex power mechanical device. As an internal combustion engine, it mainly generates heat energy through air-fuel mixed combustion, and the turbine converts heat energy into mechanical energy to generate power. Gas turbines have a wide range of uses, and are used in many fields such as ship power, aerospace, energy generation, and vehicle manufacturing, and have become the core of industrial technology in the 21st century. [0003] Gas turbine is a highly nonlinear integrated complex system engineering, and the actuator in its control system is the key functional system to ensure its stable performance and reliable operation. [0004] At present, the common faults of electric actuators include gradual faults, minor faults, sudd...

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Problems solved by technology

[0004] At present, the common faults of electric actuators include gradual faults, minor faults, sudden faults, etc. Most of the faults of mechanical equipment are gradual faults, and this type of fault is a great threat to the system due to its concealment. If it is not found in time , it will lead to a vicious circle and endanger the life of the system equipment

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