WOLFRAM SYSTEM MODELER

Sources

Library of signal source blocks generating Real, Integer and Boolean signals

Package Contents

	RealExpression Set output signal to a time varying Real expression
	IntegerExpression Set output signal to a time varying Integer expression
	BooleanExpression Set output signal to a time varying Boolean expression
	ContinuousClock Generate current time signal
	Constant Generate constant signal of type Real
	Step Generate step signal of type Real
	Ramp Generate ramp signal
	Sine Generate sine signal
	Cosine Generate cosine signal
	SineVariableFrequencyAndAmplitude Generate sine signal with variable frequency and amplitude
	CosineVariableFrequencyAndAmplitude Generate cosine signal with variable frequency and amplitude
	Sinc Generate sinc signal
	ExpSine Generate exponentially damped sine signal
	Exponentials Generate a rising and falling exponential signal
	Pulse Generate pulse signal of type Real
	SawTooth Generate saw tooth signal
	Trapezoid Generate trapezoidal signal of type Real
	LogFrequencySweep Logarithmic frequency sweep
	KinematicPTP Move as fast as possible along a distance within given kinematic constraints
	KinematicPTP2 Move as fast as possible from start to end position within given kinematic constraints with output signals q, qd=der(q), qdd=der(qd)
	TimeTable Generate a (possibly discontinuous) signal by linear interpolation in a table
	CombiTimeTable Table look-up with respect to time and linear/periodic extrapolation methods (data from matrix/file)
	BooleanConstant Generate constant signal of type Boolean
	BooleanStep Generate step signal of type Boolean
	BooleanPulse Generate pulse signal of type Boolean
	SampleTrigger Generate sample trigger signal
	BooleanTable Generate a Boolean output signal based on a vector of time instants
	RadioButtonSource Boolean signal source that mimics a radio button
	IntegerConstant Generate constant signal of type Integer
	IntegerStep Generate step signal of type Integer
	IntegerTable Generate an Integer output signal based on a table matrix with [time, yi] values

Information

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

This package contains source components, i.e., blocks which have only output signals. These blocks are used as signal generators for Real, Integer and Boolean signals.

All Real source signals (with the exception of the Constant source) have at least the following two parameters:

offset	Value which is added to the signal
startTime	Start time of signal. For time < startTime, the output y is set to offset.

The offset parameter is especially useful in order to shift the corresponding source, such that at initial time the system is stationary. To determine the corresponding value of offset, usually requires a trimming calculation.

Wolfram Language

In[1]:=

SystemModel["Modelica.Blocks.Sources"]

Out[1]:=

Revisions

October 21, 2002 by Martin Otter and Christian Schweiger:
Integer sources added. Step, TimeTable and BooleanStep slightly changed.
Nov. 8, 1999 by Christoph Clauß, Andre.Schneider@eas.iis.fraunhofer.de, Martin Otter:
New sources: Exponentials, TimeTable. Trapezoid slightly enhanced (nperiod=-1 is an infinite number of periods).
Oct. 31, 1999 by Martin Otter:
Christoph Clauß, Andre.Schneider@eas.iis.fraunhofer.de, All sources vectorized. New sources: ExpSine, Trapezoid, BooleanConstant, BooleanStep, BooleanPulse, SampleTrigger. Improved documentation, especially detailed description of signals in diagram layer.
June 29, 1999 by Martin Otter:
Realized a first version, based on an existing Dymola library of Dieter Moormann and Hilding Elmqvist.