modelSmoothStepSignal

Smooth step Set Point generator, driven by signals

Extends from Interfaces.RealNinOperation (Real comparison interface).

Information

Description

Model of a smooth step signal.

The output ( y ) remains at its initial value yin until the enabling input ENup remains false.
Then the signal changes smoothly. After the smoth start the signal grows up linearly with a slope m. When the output signal is close to the final value yfin, it is reached smoothly.
The parameter alfa (that has to be coprises between 0 and 1), indicates the portion of the rising time occupied by the smooth junction.
In this case alfa = 0.1, this indicates that each junction occupy the 10 % of the total rising time.
The additional parameter Delay = 1.5, indicates that the output has to be delayed by 1.5 seconds.

Fixed Point not available in this model

Parameters

Type	Name	Default	Description
Modelica.Units.SI.Time	Ts (from RealNinOperation)	0.1	sampling time
Integer	nInput (from RealNinOperation)	1	number of inputs
Boolean	useInputs (from RealNinOperation)	true	=true, if inputs are enabled
Fixed Point
Boolean	FixedPoint (from RealNinOperation)	false	Use fixed point real numbers
Integer	Nbit (from RealNinOperation)	16	Number of bits for representing the real numbers
Real	scaleFactor (from RealNinOperation)	1	Scale factor for Fixed Point numbers
Integer	MAX (from RealNinOperation)	integer(2^(Nbit - 1))	maximum number that can be represented with Fixed Point notation
Integer	MIN (from RealNinOperation)	-integer(2^(Nbit - 1)) + 1	minimum number that can be represented with Fixed Point notation
Smooth step
Real	alfa	0.1	Portion of time for parabolic junctions
Real	yin	0	Output initial value
Real	yfin	1	Output final value
Real	m	0.1	Slope of the ramp
Real	tin	10	Initial time
Real	delay	0	Delay

Connectors

Type	Name	Description
Modelica.Blocks.Interfaces.RealInput[nInput]	u (from RealNinOperation)	input vector
Modelica.Blocks.Interfaces.RealOutput	y (from RealNinOperation)	output
Modelica.Blocks.Interfaces.BooleanInput	ENup

Components

Type	Name	Default	Description
Integer[nInput]	Ufp (from RealNinOperation)		floating point converted input
Integer	Yfp (from RealNinOperation)		floating point converted output

Revisions

Industrial Control Systems (v 1.0.0) : April-May 2012