-- --------------------------------------------------------------------------
--
-- Title      : Draft Standard VHDL 1076.1 Multi Energy Domain Packages.
--
-- Library    : This package shall be compiled into a library symbolically
--            : named IEEE.
--
-- Developers : IEEE 1076.1 Working Group,
--              (to be changed with the actual WG PAR number).
--
-- Purpose    : This package contains declarations for modeling in the
--            : mechanical energy domain.
--
-- Note       :
--
-- --------------------------------------------------------------------------
--   Modification History :
--
--   Version   Date           Description
--     1.0     6 July 2001    Original version.
-- --------------------------------------------------------------------------

library IEEE;
    use IEEE.ENERGY_SYSTEMS.all;

package MECHANICAL_SYSTEMS is
   -- type declarations

   -- subtype declarations
   subtype DISPLACEMENT     is REAL tolerance "DEFAULT_DISPLACEMENT";
   subtype FORCE            is REAL tolerance "DEFAULT_FORCE";
   subtype VELOCITY         is REAL tolerance "DEFAULT_VELOCITY";
   subtype ACCELERATION     is REAL tolerance "DEFAULT_ACCELERATION";
   subtype MASS             is REAL tolerance "DEFAULT_MASS";
   subtype STIFFNESS        is REAL tolerance "DEFAULT_STIFFNESS";
   subtype DAMPING          is REAL tolerance "DEFAULT_DAMPING";

   subtype ANGLE            is REAL tolerance "DEFAULT_ANGLE";
   subtype TORQUE           is REAL tolerance "DEFAULT_TORQUE";
   subtype ANGULAR_VELOCITY is REAL tolerance "DEFAULT_ANGULAR_VELOCITY";
   subtype ANGULAR_ACCEL    is REAL tolerance "DEFAULT_ANGULAR_ACCEL";
   subtype MMOMENT_I        is REAL tolerance "DEFAULT_ MMOMENT_I";

   -- nature declarations
   nature TRANSLATIONAL is
      DISPLACEMENT      across
      FORCE             through
      TRANSLATIONAL_REF reference;
   nature TRANSLATIONAL_VECTOR is
      array (NATURAL range <>) of TRANSLATIONAL;

   nature TRANSLATIONAL_V is
      VELOCITY            across
      FORCE               through
      TRANSLATIONAL_V_REF reference;
   nature TRANSLATIONALV_VECTOR is
      array (NATURAL range <>) of TRANSLATIONAL_V;

   nature ROTATIONAL is
      ANGLE          across
      TORQUE         through
      ROTATIONAL_REF reference;
   nature ROTATIONAL_VECTOR is
      array (NATURAL range <>) of ROTATIONAL;

   nature ROTATIONAL_V is
      ANGULAR_VELOCITY across
      TORQUE           through
      ROTATIONAL_V_REF reference;
   nature ROTATIONALV_VECTOR is
      array (NATURAL range <>) of ROTATIONAL_V;

   -- subnature declarations

   -- object declarations

   -- attribute declarations
   attribute SYMBOL of DISPLACEMENT     : subtype is "Meter";
   attribute SYMBOL of FORCE            : subtype is "Newton";
   attribute SYMBOL of VELOCITY         : subtype is "Meters/Second";
   attribute SYMBOL of ACCELERATION     : subtype is "Meters/Second^2";
   attribute SYMBOL of MASS             : subtype is "Kilogram";
   attribute SYMBOL of STIFFNESS        : subtype is "Newton/Meter";
   attribute SYMBOL of DAMPING          : subtype is "Newton Seconds/Meter";

   attribute SYMBOL of ANGLE            : subtype is "Radian";
   attribute SYMBOL of TORQUE           : subtype is "Newton Meters";
   attribute SYMBOL of ANGULAR_VELOCITY : subtype is "Radians/Second";
   attribute SYMBOL of ANGULAR_ACCEL    : subtype is "Radiens/Second^2";
   attribute SYMBOL of MMOMENT_I        : subtype is "Kilogram Meters^2";

   -- operation declarations (e.g., subprograms)

   -- alias declarations
   alias ANCHOR is TRANSLATIONAL_REF;
end package MECHANICAL_SYSTEMS;