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-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
library ieee_proposed; use ieee_proposed.mechanical_systems.all;
entity gear_rv_r is
generic ( ratio : real := 1.0 ); -- gear ratio (revs of shaft2 for 1 rev of shaft1)
-- note: can be negative, if shaft polarity changes
port ( terminal rotv1 : rotational_v; -- rotational velocity terminal
terminal rot2 : rotational ); -- rotational angle terminal
end entity gear_rv_r;
----------------------------------------------------------------
architecture ideal of gear_rv_r is
quantity w1 across torq_vel through rotv1 to rotational_v_ref;
quantity theta across torq_ang through rot2 to rotational_ref;
begin
theta == ratio * w1'integ; -- output is angle (integral of w1)
torq_vel == -1.0 * torq_ang * ratio; -- input torque as function of output angle
end architecture ideal;
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