Design And Study Of Electro-hydraulic Loading System For Gas Turbine Inlet Guide Vane

The electro-hydraulic loading systems have been widely used in the ground experiment for aviation and shipbuilding industry.Based on the requirements of engineering test for gas turbine inlet guide vane system(IGV system),electro-hydraulic loading system is proposed to provide simulation of aerodynamic load torque acting on inlet guide vanes.Disturbance from the motion of loading mechanism will bring about inertia moment loss and additional compression or expansion of oil,consequently cause remarkable load tracking error,which must be controlled in allowable limit.In this paper,based on theoretical analysis,a new control strategy is proposed,the control effectiveness is then validated in the simulation experiment.The main work includes:1.Nonlinear models of the IGV system and the electro-hydraulic loading system are established based on modular modeling method with Simscape tool;2.System analysis on the electro-hydraulic loading system is carried out and related factors influencing the load effect is found.Control mechanism of PID +inertia torque compensation +fuzzy compensation is proposed to improve load tracking accuracy.Conclusions of the theoretical analysis are verified through digital simulation experiment;3.Simulation model is converted into codes that can be loaded and run in the LabVIEW environment,so that the emulation computer will be able to run real-time simulation,which lays a foundation for the HIL simulation.4.Build the software platform of the HIL system,including the modules for real-time DAQ and control,real-time simulation,data recording and human-computer interaction.5.Carry out HIL experiment and obtain the actual control effect of loading system and IGV system.The results show that the new control strategy significantly improves the performance of electro-hydraulic loading system,the HIL system is able to meet the test requirements,costs and risks of adopting physical product of mechanical parts are avoided,an important means for the validation of controller and product performance of hydraulic parts is provided as well.