Hydraulic Actuator with Digital Position Controller

Open Model

Warning: This example uses the hydraulic domain, which will be removed in a future release. Find an equivalent example model that uses the isothermal liquid domain here: Hydraulic Actuator with Digital Position Controller. To convert models to the isothermal liquid domain, use the hydraulicToIsothermalLiquid tool.

This example shows a two-way valve acting in a closed-loop circuit together with a double-acting cylinder. The controller is represented as a continuous-time transfer function plus a transport delay. The delay allows for the computational time (one discrete time period) plus the zero-order hold (half a discrete time period) when implemented in discrete time. The model is configured for linearization so that a frequency response can be generated. To configure for faster desktop simulation, comment through the transport delay and increase the solver maximum step size.

Model

Hydraulic Actuator Subsystem

Hydraulic Cylinder Subsystem

Simulation Results from Scopes

Simulation Results from Simscape Logging

Frequency Response

See Also

Topics