A New Method for PID Tuning Including Plants Without Ultimate Frequency

作者：Bazanella Alexandre Sanfelice^*; Alves Pereira Luis Fernando; Parraga Adriane

来源：IEEE Transactions on Control Systems Technology, 2017, 25(2): 637-644.

DOI：10.1109/TCST.2016.2557723

• Fractional-order systems
• frequency domain controller design
• process control
• proportional-integral-derivative (PID) autotuning
• PID controllers
• Ziegler-Nichols (ZN) methods

The classical relay feedback method for tuning proportional-integral-derivative (PID) controllers cannot be applied to plants whose Nyquist diagrams do not cross the negative real axis; these are customarily tuned based on the reaction curve experiment. In this brief, we propose a tuning method based on a modified relay feedback experiment. In this experiment, a transfer function of constant phase in an arbitrarily large range of frequencies is inserted in the loop. The proposed methodology thus unifies the Ziegler-Nichols-like tuning methods, by allowing PID tuning based on relay feedback for a class of plants without ultimate frequency.

• 出版日期2017-3