The
graphing window displays graphs of solutions, with rest initial conditions,
of the equation
mx"
+ bx' + kx = f(t) ,
for
several standard input signals f(t) : the delta function, the unit step
function, and the unit ramp function
(f(t)
= t for t > 0 , f(t) = 0 for t < 0).
Graphs
of the input function itself is also displayed in a paler color. Sliders
control the system parameters m, b, and k. Toggles specify display of
the delta response (cyan), the step response (green), and the ramp response
(yellow). A slider at bottom right controls the vertical scale.
The
roots of the characteristic polynomial are displayed at lower left.
A
cursor roll-over brings up cross-hairs and a readout of the t and x
coordinates.
©
2008 H. Miller and J.-M. Claus