Error Transfer Function (ERTF(s)) |
Use to evaluate steady-state system
response to step or ramp input.
|
System Type |
# free integrators. Determines whether
steady-state error will be zero, finite or infinite.
|
Transient Response specs |
Rise time (to given % of final value), settling time (within given % of f.v.), peak time, peak value, etc
|
Dominant Poles |
The transient response is essentially limited/defined/dominated by the 'slowest' pole(s), typically.
|
S-plane Performance Specs |
Location in the s-plane determines whether or not you meet (transient) specs.
|
Rate feedback vs. PD Control |
Both use derivative action ('s') [w/ a gain];
effect is similar to damping. (Note PD also adds zero.)
|