TY - GEN
T1 - A study on the on-line system identification and PID tuning of a buck converter
AU - Serrano, Victoria
AU - Tsakalis, Konstantinos
PY - 2016/5/25
Y1 - 2016/5/25
N2 - In this paper we study the on-line system identification process and the proportional-integral-derivative (PID) tuning of a buck converter. The system identification process was performed using a recursive least squares algorithm. The estimation error and parameter error were generated to demonstrate that the system was converging to its true parameters. The estimation error shows an absolute value of approximately 1 × 10-5 in less that 10ms. All the parameters were effectively converging in less that 100μs. Once the system was properly identified, an offline PID controller was designed to further implement it on the adaptive loop. Three different techniques were used to satisfy the requirements of the buck converter: phase and gain margin, pole-zero cancellation and frequency loop shaping. Phase and gain margin still prevails as the easiest method to design controllers. Pole-zero cancellation is based on pole-placement and is fairly easy to implement in order to obtain the gains of a PID controller. However, although these controllers can be easily designed, they do not provide the best response compared to the Frequency Loop Shaping (FLS) technique in terms of frequency and time responses.
AB - In this paper we study the on-line system identification process and the proportional-integral-derivative (PID) tuning of a buck converter. The system identification process was performed using a recursive least squares algorithm. The estimation error and parameter error were generated to demonstrate that the system was converging to its true parameters. The estimation error shows an absolute value of approximately 1 × 10-5 in less that 10ms. All the parameters were effectively converging in less that 100μs. Once the system was properly identified, an offline PID controller was designed to further implement it on the adaptive loop. Three different techniques were used to satisfy the requirements of the buck converter: phase and gain margin, pole-zero cancellation and frequency loop shaping. Phase and gain margin still prevails as the easiest method to design controllers. Pole-zero cancellation is based on pole-placement and is fairly easy to implement in order to obtain the gains of a PID controller. However, although these controllers can be easily designed, they do not provide the best response compared to the Frequency Loop Shaping (FLS) technique in terms of frequency and time responses.
KW - PID controller
KW - buck converter
KW - frequency loop shaping
KW - system identification
UR - http://www.scopus.com/inward/record.url?scp=84978132488&partnerID=8YFLogxK
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U2 - 10.1109/ICNSC.2016.7479008
DO - 10.1109/ICNSC.2016.7479008
M3 - Conference contribution
AN - SCOPUS:84978132488
T3 - ICNSC 2016 - 13th IEEE International Conference on Networking, Sensing and Control
BT - ICNSC 2016 - 13th IEEE International Conference on Networking, Sensing and Control
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 13th IEEE International Conference on Networking, Sensing and Control, ICNSC 2016
Y2 - 28 April 2016 through 30 April 2016
ER -