This package provides predefined types, such as Mass,
Angle, Time, based on the international standard
on units, e.g.,
type Angle = Real(final quantity = "Angle",
final unit = "rad",
displayUnit = "deg");
Some of the types are derived SI units that are utilized in
package Modelica (such as ComplexCurrent, which is a complex number
where both the real and imaginary part have the SI unit
Ampere).
Furthermore, conversion functions from non SI-units to SI-units
and vice versa are provided in subpackage Conversions.
For an introduction how units are used in the Modelica Standard
Library with package Units, have a look at: How to use
Units.
Copyright © 1998-2020, Modelica Association and contributors
Contents
Name |
Description |
UsersGuide |
User's Guide of Units Library |
SI |
Library of SI unit definitions |
NonSI |
Type definitions of non SI and other units |
Conversions |
Conversion functions to/from non SI units and type definitions
of non SI units |
Icons |
Icons for Units |
- May 25, 2011 by Stefan Wischhusen:
Added molar units for energy and enthalpy.
- Jan. 27, 2010 by Christian Kral:
Added complex units.
- Dec. 14, 2005 by Martin Otter:
Add User's Guide and removed "min" values for Resistance and
Conductance.
- October 21, 2002 by Martin Otter and
Christian Schweiger:
Added new package Conversions. Corrected typo
Wavelenght.
- June 6, 2000 by Martin Otter:
Introduced the following new types
type Temperature = ThermodynamicTemperature;
types DerDensityByEnthalpy, DerDensityByPressure,
DerDensityByTemperature, DerEnthalpyByPressure, DerEnergyByDensity,
DerEnergyByPressure
Attribute "final" removed from min and max values in order that
these values can still be changed to narrow the allowed range of
values.
Quantity="Stress" removed from type "Stress", in order that a type
"Stress" can be connected to a type "Pressure".
- Oct. 27, 1999 by Martin Otter:
New types due to electrical library: Transconductance,
InversePotential, Damping.
- Sept. 18, 1999 by Martin Otter:
Renamed from SIunit to SIunits. Subpackages expanded, i.e., the
SIunits package, does no longer contain subpackages.
- Aug 12, 1999 by Martin Otter:
Type "Pressure" renamed to "AbsolutePressure" and introduced a new
type "Pressure" which does not contain a minimum of zero in order
to allow convenient handling of relative pressure. Redefined
BulkModulus as an alias to AbsolutePressure instead of Stress,
since needed in hydraulics.
- June 29, 1999 by Martin Otter:
Bug-fix: Double definition of "Compressibility" removed and
appropriate "extends Heat" clause introduced in package
SolidStatePhysics to incorporate ThermodynamicTemperature.
- April 8, 1998 by Martin Otter and
Astrid Jaschinski:
Complete ISO 31 chapters realized.
- Nov. 15, 1997 by Martin Otter and
Hubertus Tummescheit:
Some chapters realized.
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