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How much should be the values and/or percentages of these
given below factors for a good controller ?
Steady state error
Delay
Rise Time
Overshoot
Peak Time
Settling Time
Damping
Oscillations & vibrations
thanks
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Answer Posted / rajkumar
A proportional controller (Kp) will have the effect of
reducing the rise time and will reduce ,but never eliminate,
the steady-state error. An integral control (Ki) will have
the effect of eliminating the steady-state error, but it may
make the transient response worse. A derivative control (Kd)
will have the effect of increasing the stability of the
system, reducing the overshoot, and improving the transient
response.
for full details visit
http://www.engin.umich.edu/group/ctm/PID/PID.html
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