CAJ | 학술논문

为了提高数字DC-DC变换器的瞬态响应性能，设计了一种基于数字预测控制方法的模糊PID控制器。该控制器根据Buck型DC-DC变换器的电路结构，准确预测单个开关周期或多个开关周期后的负载电压和电感电流，以克服环路时延对系统瞬态响应的影响；同时，在基本PID控制基础上引入模糊控制，实时在线调整PID控制参数，以克服变换器的非线性特性对瞬态能力的影响。所设计数字控制器经FPGA验证，结果表明，与基本PID控制相比，所设计数字预测模糊PID控制器能有效提高变换器的瞬态响应能力，变换器的瞬态响应时间缩短1/3，电压超调量小于5％。
위료제고수자DC-DC변환기적순태향응성능，설계료일충기우수자예측공제방법적모호PID공제기。해공제기근거Buck형DC-DC변환기적전로결구，준학예측단개개관주기혹다개개관주기후적부재전압화전감전류，이극복배로시연대계통순태향응적영향；동시，재기본PID공제기출상인입모호공제，실시재선조정PID공제삼수，이극복변환기적비선성특성대순태능력적영향。소설계수자공제기경FPGA험증，결과표명，여기본PID공제상비，소설계수자예측모호PID공제기능유효제고변환기적순태향응능력，변환기적순태향응시간축단1/3，전압초조량소우5％。
To improve the transient response of digital DC-DC converter,a digital fuzzy proportion-al-integral-derivative (PID)controller with a prediction algorithm is proposed.In the digital control-ler,the output voltage and inductance current after one cycle or multiple cycles are predicted accu-rately based on the circuit structure of Buck DC-DC converter,which overcomes the influence of loop time delay on the transient response.Meanwhile,fuzzy control is introduced in the basic PID control to overcome the influence of the nonlinear characteristics of converter on the transient re-sponse through the real-time online regulation of PID control parameters.The proposed digital con-troller is implemented by the field programmable gate array (FPGA ).The results of verification show that the proposed controller can effectively improve the transient response of converter com-pared with basic PID control.The transient response time of converter can decrease by one third and the voltage overshoot is less than 5%.