Proportional Valve Actuator
Power-controlled valve actuator in any fluid domain
Simscape / Fluids / Valve Actuators
Simscape / Fluids / Isothermal Liquid / Valves & Orifices / Valve Actuators & Forces / Valve Actuators
The Proportional Valve Actuator block models a power-controlled actuator used in conjunction with a valve block in any in any fluid domain. You can use it in combination with any valve block that takes a physical signal as input. The signal to open or close the valve is received at port A. The opening distance for a connected valve is returned as a physical signal at port S.
You can adjust the opening or closing magnitude with the Actuator gain parameter. A first-order lag in time is applied to the actuation distance:
IG is the signal received at port A multiplied by the Actuator gain. Outside of the valve stroke limits, IG is the Valve stroke if fully extended and the negative Valve stroke if fully retracted.
d is the current actuator position.
τ is the Time constant.
A — Valve opening signal
Physical signal that indicates valve opening or closing, specified as a physical signal. The signal is multiplied by the Actuator gain value.
S — Valve opening distance, m
Opening distance for the connected valve, in m, specified as a physical signal.
If you use the Proportional Valve Actuator block with a valve from the Gas Library, the gas block converts the actuator signal units of m to units of 1.
Actuator gain — Input signal multiplier
5e-4 m (default) | positive scalar
Input signal multiplier for the valve opening distance.
Time constant — Opening signal time constant
0.01 s (default) | positive scalar
Constant that captures the time required to reach steady-state conditions during actuation. This parameter impacts the response lag to the valve opening or closing signal.
Valve stroke — Maximum valve opening distance
0.005 m (default) | positive scalar
Maximum opening distance of the connected valve.
C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.
Introduced in R2020a