%% Double Spring Mass System
% 
% This system models a double spring-mass-damper system with a periodically 
% varying forcing function.  Associated with the demo is an animation function 
% that will automatically open a figure window and display to it. In this system, 
% the only sensor is attached to the mass on the left, and the actuator is 
% attached to the mass on the left. State estimation and LQR control are used.

open_system('sldemo_dblcart1')