公开(公告)号：WO2022003601A1

公开(公告)日：2022-01-06

申请号：PCT/IB2021/055878

申请日：2021-06-30

Applicant: KHALIFA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： BOIKO, Igor ,  SHEHADA, Ahmed ,  BEIG, Balanthi Mogru Abdul Rahiman ,  YAN, Yan

IPC: G05B11/42 ,  H02M7/48

Abstract: A system (200) including a proportional -integral-derivative (PID) controller (201), a modified relay feedback test (MRFT) block (202), a memory block (211), a biasing block (213), a dq0-to-abc transformation block (210), a switch (207) configured to selectively couple output signal of the biasing block or the PID controller output signal to the input of the dq0-to-abc transformation block (210), a three phase digital pulse width modulator (208), electronic switches (203), a voltage sensor (206) configured to measure the output of each voltage of the three phases on the load and produce voltage data signals (Voa, Vob, Voc), and an abc-to-dq0 transformation block (209) having an input being a representative of the phase voltages on the load, and producing an output being a representative of these voltages in the dq0 format.

公开(公告)号：WO2022003571A1

公开(公告)日：2022-01-06

申请号：PCT/IB2021/055825

申请日：2021-06-29

Applicant: KHALIFA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： BOIKO, Igor ,  SHEHADA, Ahmed ,  BEIG, Balanthi Mogru Abdul Rahiman ,  YAN, Yan

IPC: G05B11/42

Abstract: A method of automatically tuning a proportional-integral-derivative (PID) controller (102) controlling a DC-DC converter (100) includes substituting the PID controller (102) with a modified relay feedback test (MRFT) (104) controller having a threshold parameter (β) and a magnitude parameter (h), iteratively determining a current error signal (e[k]) by measuring an output voltage (Vo[k]) of the DC-DC converter (100) and comparing it to a desired reference output voltage (Vo-ref), input the error signal (e[k]) to the MRFT (104), determining an output value (u[k]) of the MRFT, update the duty cycle (D) based on the output value (u[k]), operating the DC-DC converter (100) using the updated duty cycle (D), exciting oscillations in the loop containing the MRFT (104) and the DC-DC converter (100), measuring a frequency (Ω0) and amplitude (α0) of the output voltage (Vo[k]), updating PID controller parameters based on the frequency (Ω0) and amplitude (α0), and substituting the MRFT (104) with the PID controller (102).