Non Linear Dead Band, second order system

Cuthbert Nyack
Deadband can occur in positional systems with friction. The applet below show the effect of deadband on the response of a second order system. Deadband is a band of displacements about the desired set point where the restoring force is zero. In this applet, the band is set by Ul and Ll.
The eg parameters (K, 1.0, 0.2, -0.2, 1.0, 1.0) show that as K is varied from 2 to 30 the system can settle to a final value which is ~ ±0.2 of the desired settling point.

Gif image below shows how applet should appear.

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COPYRIGHT 2006 Cuthbert Nyack.