By Yu, Cheng-Ching
Read Online or Download Autotuning of PID Controllers [electronic resource]: A Relay Feedback Approach PDF
Best electronics books
An intuitive, applications-driven consultant to electronics for engineers, hobbyists, and students--one that doesn't overload readers with technical aspect. Chock-full of illustrations--over 750 hand-drawn pictures supply transparent, targeted directions on tips to flip theoretical rules into real-life contraptions.
Supplying step by step, in-depth insurance, the recent 3rd version of energy Electronics: Converters, functions, and layout presents a cohesive presentation of strength electronics basics for functions and layout within the strength variety of 500 kW or much less. The textual content describes a number of useful and rising energy digital converters made possible through the hot new release of energy semiconductor units.
- Teardowns: Learn How Electronics Work by Taking Them Apart
- Nanotechnology for Electronics, Photonics, and Renewable Energy
- The Resource Handbook of Electronics
- Innovative High Temperature Fuel Cell Systems
- Electronic Amplifier Circuits Theory and Design
- Analogue Electronics for Higher Studies
Extra resources for Autotuning of PID Controllers [electronic resource]: A Relay Feedback Approach
0 , then the results can be completely misleading. 12, which is less than 10% of the true value. We have to be very cautious when using these models. 2 Improved Algorithm In theory, if the model structure is correct and the ultimate gain and ultimate frequency are correctly identified, then we could have a very good approximation of the transfer function. For example, if the K u and u in the previous example are close to the true values, then we will not have errors in the steady state gains and time constant for model 1.
Eng. Chem. Res. 1997;36:375. 13. Majhi S, Atherton DP. Auto-tuning and controller design for processes with small time delays. IEE Proc. Control Theory Appl. 1999;146(3):415. 14. Kaya I, Atherton DP. Parameter estimation from relay auto-tuning with asymmetric limit cycle data. Process Control 2001;11:429. 15. Panda RC, Yu CC. Analytical expressions for relay feedback responses. J. Process Control 2003;13:48. 4 Shape of Relay Luyben  pointed out that the shapes of the response curves of a relay feedback test contain useful information.
Once you have obtained the information on the ultimate frequency, the controller settings can be decided using the original or modified Ziegler–Nichols methods. You can also go a step further to find an appropriate transfer function for the process. This can be useful for implementing MPC or dead time compensator (Smith predictor). Better approximation can be achieved using the improved algorithm. Finding transfer functions using the biased relay plus hysteresis was discussed by Wang et al. .