-- 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_wa is port ( terminal external_attachment : translational ); end entity moving_mass_wa; ---------------------------------------------------------------- architecture behavioral of moving_mass_wa 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 velocity == position'dot; driving_force == mass*velocity'dot + damping*velocity + stiffness*position; end architecture behavioral;