Parker Aries AR-04CE - Position Response Types; Table 27 Position Response Types

Parker Hannifin
Chapter 5 Tuning - 53 -
Position Response Types
Table 27 identifies the six basic types of position responses. The primary
difference among these responses is due to damping—the suppression (or
cancellation) of oscillation.
Response Description Profile (position/time)
Unstable
Instability causes the
position to oscillate in
an exponentially
diverging fashion.
Over-
damped
A highly damped, or
over-damped, system
gives a smooth but
slower response.
Under-
damped
A slightly damped, or
under-damped,
system gives a slightly
oscillatory response.
Critically
damped
A critically-damped
response is the most
desirable because it
optimizes the trade-off
between damping and
speed of response.
Oscillatory
An oscillatory
response is
characterized by a
sustained position
oscillation of equal
amplitude.
Chattering
Chattering is a high-
frequency, low-
amplitude oscillation
that is usually audible.
Table 27 Position Response Types