Automatic Tuner for PID Controllers with Elements of Artificial Intelligence

Automatic tuning of decentralized PID controllers for TITO processes

This paper presents a new algorithm for automatic tuning of decentralized PID control for two-input two-output (TITO) plants that fully extends the single-loop relay auto-tuner to the multiloop case. The tuning procedure consists of two stages. In the first, the desired critical point, which consists of the critical gains of the two loops and a critical frequency, is identified. Unlike SISO pla...

Automatic design of robust PID controllers based on QFT specifications

This paper proposes an optimization algorithm for the automatic design of robust PID controllers using Quantitative Feedback Theory (QFT) specifications. The proposed algorithm is based on a criterion to minimize the energy of the control effort. To illustrate the methodology, the pitch angle of a laboratory helicopter is used as a model application with structured uncertainty. The results show...

Automatic Tuning of PID Controllers based on Asymmetric Relay Feedback

This thesis presents an improved version of the classic relay autotuner. The proposed autotuner uses an asymmetric relay function to better excite the process in the experiment phase. The improved excitation provides the possibility to obtain better models and hence better tuning, without making the autotuner more complicated or time consuming. Some processes demand more accurate modeling and t...

Automatic tuning of PID controllers based on transfer function estimation

Auto-tuners for PID Controllers

PID control is used everywhere—in cellular phones, vehicles, process control, heating, ventilation, air conditioning, machine tools, and motor drives. Many PID controllers are found in cars, for example, in engine, cruise, and traction control. PID control is also embedded in instruments like atomic force microscopes and adaptive optics. Because of their widespread use, it is difficult to preci...