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Chapter 12 |
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In this chapter we utilize five methods for robust design, including root locus, frequency response, and ITAE methods for a robust PID system. Many recent control design methodologies focus on robustness—stability robustness and performance robustness—in the presence of uncertainty. The recent design methodologies address the fact that our physical systems and the external environment in which they operate cannot be modeled precisely, may change in an unpredictable manner, and may be subject to significant disturbances.
However, we should also realize that classical design techniques may also
produce robust control systems. Control engineers who are aware of these issues can
design robust PID controllers, robust lead-lag controllers, and so forth. In this chapter
we also discuss the use of internal model and pseudo-quantitative feedback methods
to achieve robust control. The chapter concludes with a PID controller design
for the Sequential Design Example: Disk Drive Read System.
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