【正文】
。圖 7是傳統(tǒng) PID 與模糊 PID 控制器在 Simulink 中的正弦仿真波形比較。 我們把輸入信號變?yōu)檎倚盘栐僖淮芜M行傳統(tǒng) PID 與模糊 PID 控制器的對比。圖 6是傳統(tǒng) PID 與模糊 PID 控制器在 Simulink 中的階躍仿真波形比較。 IK =3。 為了方便與傳統(tǒng) PID控制器進行比較,在 Simulink仿真環(huán)境中作出傳統(tǒng) PID控制以便于對模糊 PID 進行比較。 DK =2。針對本次控制器設計,我們設置被控對象為))()()(( 4321 10 ???? ssss,根據(jù)被控對象,設置相應的 PID 參數(shù)為: PK =6。 圖 2 輸入變量隸屬度函 圖 3 輸出變量隸屬度函 ( 3) 編輯模糊規(guī)則庫 根據(jù)以上各輸出參數(shù)的模糊規(guī)則表,可以歸納出 49 條控制邏輯規(guī)則,具體的控制規(guī)則如下所示: 1. If (e is NB) and (ec is NB) then (kp is NB)(ki is PB)(kd is NS)(1) 2. If (e is NB) and (ec is NM) then (kp is NB)(ki is PB)(kd is PS)(1) 3. If (e is NB) and (ec is NS) then (kp is NM)(ki is PM)(kd is PB)(1) 4. If (e is NB) and (ec is ZO) then (kp is NM)(ki is PM)(kd is PB)(1) 5. If (e is NB) and (ec is PS) then (kp is NS)(ki is PS)(kd is PB)(1) 6. If (e is NB) and (ec is PM) then (kp is ZO)(ki is ZO)(kd is PM)(1) 7. If (e is NB) and (ec is PB) then (kp is ZO)(ki is ZO)(kd is NS)(1) 8. If (e is NM) and (ec is NB) then (kp is NB)(ki is PB)(kd is NS)(1) 9. If (e is NM) and (ec is NM) then (kp is NB)(ki is PB)(kd is PS)(1) 10. If (e is NM) and (ec is NS) then (kp