Integrator

Output the integral of the input signal with optional reset

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

This blocks computes output y as integral of the input u multiplied with the gain k:

    k
y = - u
    s

It might be difficult to initialize the integrator in steady state. This is discussed in the description of package Continuous.

If the reset port is enabled, then the output y is reset to set or to y_start (if the set port is not enabled), whenever the reset port has a rising edge.

Parameters (5)

k	Value: 1 Type: Real Description: Integrator gain
use_reset	Value: false Type: Boolean Description: = true, if reset port enabled
use_set	Value: false Type: Boolean Description: = true, if set port enabled and used as reinitialization value when reset
initType	Value: Init.InitialState Type: Init Description: Type of initialization (1: no init, 2: steady state, 3,4: initial output)
y_start	Value: 0 Type: Real Description: Initial or guess value of output (= state)

Connectors (4)

	u	Type: RealInput Description: Connector of Real input signal
	y	Type: RealOutput Description: Connector of Real output signal
	reset	Type: BooleanInput Description: Optional connector of reset signal
	set	Type: RealInput Description: Optional connector of set signal

Used in Examples (11)

	PID_Controller Modelica.Blocks.Examples Demonstrates the usage of a Continuous.LimPID controller
	SlewRateLimiter Modelica.Blocks.Examples Demonstrate usage of Nonlinear.SlewRateLimiter
	SinCosEncoder Modelica.Blocks.Examples Evaluation of a sinusoidal encoder
	BatteryDischargeCharge Modelica.Electrical.Batteries.Examples Discharge and charge idealized battery
	SuperCapDischargeCharge Modelica.Electrical.Batteries.Examples Discharge and charge idealized supercap
	CCCVcharging Modelica.Electrical.Batteries.Examples Charge a battery with constant current - constant voltage characteristic
	CCCV_Cell Modelica.Electrical.Batteries.Examples Charge a cell with constant current - constant voltage characteristic
	CCCV_CellRC Modelica.Electrical.Batteries.Examples Charge a transient cell with constant current - constant voltage characteristic
	CCCV_Stack Modelica.Electrical.Batteries.Examples Charge a stack with constant current - constant voltage characteristic
	CCCV_StackRC Modelica.Electrical.Batteries.Examples Charge a transient stack with constant current - constant voltage characteristic
	ThreePhaseTwoLevel_PWM Modelica.Electrical.PowerConverters.Examples.DCAC.PolyphaseTwoLevel Test of pulse width modulation methods

Used in Components (6)

	PID Modelica.Blocks.Continuous PID-controller in additive description form
	LimPID Modelica.Blocks.Continuous P, PI, PD, and PID controller with limited output, anti-windup compensation, setpoint weighting and optional feed-forward
	CylinderAirCharge Modelica.Clocked.Examples.Systems.Utilities.ComponentsThrottleControl Integrates the air mass flow into a cylinder. After the charge for one cylinder is complete, resets the mass to 0.
	LimitedPI Modelica.Electrical.Machines.Examples.ControlledDCDrives.Utilities Limited PI-controller with anti-windup and feed-forward
	IdealDcDc Modelica.Electrical.Machines.Examples.ControlledDCDrives.Utilities Ideal DC-DC inverter
	SinCosEvaluation Modelica.Electrical.Machines.Utilities Evaluation of the signals of a sin-cos-resolver