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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 moving_mass is
port ( terminal external_attachment : translational );
end entity moving_mass;
----------------------------------------------------------------
architecture behavioral of moving_mass is
constant mass : real := 10.0;
constant stiffness : real := 2.0;
constant damping : real := 5.0;
quantity position across driving_force through external_attachment;
quantity velocity : real;
begin
position == velocity'integ;
mass * velocity'dot == driving_force - stiffness * velocity'integ - damping * velocity
tolerance velocity'tolerance;
end architecture behavioral;
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