Get Advances in PID Control PDF

By Tan Kok Kiong PhD, Wang Qing-Guo PhD, Hang Chang Chieh PhD, Tore J. Hägglund PhD (auth.)

ISBN-10: 1447108612

ISBN-13: 9781447108610

ISBN-10: 1447112199

ISBN-13: 9781447112198

Recently, loads of attempt has been devoted to capitalising on advances in mathematical regulate conception along side tried-and-tested classical regulate buildings really with reference to the improved robustness and tighter keep watch over of contemporary PID controllers. a lot of the study during this box and that of the operational autonomy of PID controllers has already been translated into priceless new services for business controllers. This e-book covers the real wisdom in terms of the heritage, software, and layout of, and advances in PID controllers in a unified and finished therapy together with:
Evolution and elements of PID controllers
Classical and smooth PID controller design
Automatic Tuning
Multi-loop regulate
Practical concerns serious about PID regulate
The ebook is meant to be beneficial to a large spectrum of readers attracted to PID keep an eye on starting from practicing technicians and engineers to graduate and undergraduate students.

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3. 2 Design Objectives - Speed Versus Stability The design objectives or the way the controller is expected to control naturally depends on the application in point. The general dilemma faced in T. K. , Advances in PID Control © Springer-Verlag London 1999 20 Advances in PID Control controller tuning is the compromise between the desire for speed versus the desire for stability. Fast control is usually accompanied by poor stability and oscillations. A step change in the set point may well result in a severe overshoot.

Pure derivative control cannot be implemented. The range of ¢A is therefore -7r/2 ::; ¢A ::; CPo where CPo is about 7r/3 or 60°. With the Ziegler-Nichols frequency response method, it follows that: Gc(jw",) = 0. 28j). 2. 28j. This corresponds to a phase advance of 57l' /36 at w7r . 3 The modified generalized frequency response method This method is a general version of the Ziegler-Nichols frequency response method. Other points of the Nyquist curve can be selected to be moved to specified positions.

Ti is set at maximum and Td at the mini- mum. 2. Set Ke at a low value, say 20%. 3. Put the controller in the automatic mode. 4. Make a small set point or load change and observe the response of the controlled variable. The gain is low, so the response will be sluggish. 5. Increase Ke by a factor of two and make another small change in set point or load. 6. til the loop becomes very underdamped and oscillatory. The gain at which this occurs is called the ultimate gain. 7. Reduce Ke to half this ultimate value.

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Advances in PID Control by Tan Kok Kiong PhD, Wang Qing-Guo PhD, Hang Chang Chieh PhD, Tore J. Hägglund PhD (auth.)

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