水下液压步进式执行器建模方法及仿真验证OA

A subsea hydraulic stepping actuator is the core equipment for flow control in deep-sea Christmas trees,and its dynamic performance directly influences the safe and stable operation of subsea production systems.To address the difficulty in accurately characterizing the subsea hydraulic stepping actuator's nonlinear dynamic response in deep-sea high-pressure and low-temperature environment,a high-precision modeling method based on the design and analysis software of subsea-control system is proposed.Using a component-based modeling concept,a simulation model of this actuator is established.It integrates the Stribeck friction model,deep-sea pressure compensation mechanism and hydraulic-mechanical coupling characteristics.Innovatively,the Gevrey function is adopted to smooth the mechanical friction link.It effectively optimizes the numerical stability and response speed of the solver.Through the parameter sensitivity analysis,typical working condition simulation and demonstration project application verification,it is verified that during the opening process of the production choke valve,the deviations of key indicators such as actuator piston displacement and oil supply pressure are all less than 2%,and the nonlinear dynamic response of the actuator can be accurately reproduced.This modeling method provides a reliable technical means for the design optimization and performance prediction of subsea hydraulic stepping actuators,and also lays a modeling technical foundation for achieving independent and controllable development of deep-sea equipment.