Page 650 - Mechanical Engineers' Handbook (Volume 2)
P. 650
3 Frequency Compensation to Improve Overall Performance 641
Figure 19 Effects of second-order lead compensation on a poorly damped system (inherent integration):
(a) root locus; (b) closed-loop frequency response.
is required, the use of inner feedback loops is generally more effective, as explained in
Section 4.
3.3 Higher Order Effects
In the foregoing sections, the discussion has centered around systems whose forward-loop
dynamics can be approximated by relatively simple lag elements. While this approach is
often entirely adequate for controller design and performance estimation, the designer should
