blockRRate

Restricted rate element
Diagram of RRate

Information

This is the System Dynamics restricted Rate element, whereby the rate itself is determined by a single variable in its laundry list. The indicated direction of mass flow denotes the direction of true mass flow. If the control signal of the rate assumes a negative value, no mass will flow. If the control signal of the rate assumes a too large positive value, the mass flow will be limited to its allowed maximum value.

The restricted rate element should e.g. be used to model a kitchen faucet. The valve can be opened or closed, but there is a limit to how much water per time unit you can get out of the faucet, and no manipulation of the faucet will ever make water flow from the sink back into the faucet.

Parameters

TypeNameDefaultDescription
RealinfModelica.Constants.inf
RealminFlow0Smallest allowed flow
RealmaxFlowinfLargest allowed flow

Connectors

TypeNameDefaultDescription
Modelica.Blocks.Interfaces.RealInputuSignal inflow variable
SystemDynamics.Interfaces.MassOutPortyMass inflow variable
SystemDynamics.Interfaces.MassOutPorty1Mass outflow variable

Components

TypeNameDefaultDescription
Realrate
Modelica.Blocks.Nonlinear.LimiterLimiter1