臺灣博碩士論文加值系統

由於感應馬達是具有相當程度非線性(nonlinearity)之受控體(plant)，
因此吾人針對感應馬達的速度與轉矩控制，提出了一個滑模控制(Sliding
mode control , SMC)法則。SMC控制器是基於固定轉子磁通向量之同步旋
轉參考座標軸下的感應馬達數學模式來設計。在SMC設計過程中，吾人是
將參考力矩訊號視為PI速度控制器之可變輸出，同時亦將PI速度控制器的
參數納入考量，這使得所設計的控制器能確保系統的穩定度。同時吾人亦
設計了模糊滑模控制(fuzzy sliding mode control, FSMC)，期能使系統
對外來的負載擾動(external load disturbances)及受控體的參數變動(
parameter variations)在速度控制上有更佳的強健性。在本文中，吾人
分別設計了SMC及FSMC兩種控制器，並且分別加入直流負載(dc load)及交
流負載(ac load)，以比較兩種速度控制之強健性。整個感應馬達的速度
控制系統，是以數位化的方式來實現，利用高速的數位訊號處理器(
digital signal processor, DSP)，並配合個人電腦、輸出功率為一馬力
的感應馬達及感應馬達驅動器來達成速度控制的目的。

An induction motor is an inherently nonlinear controlled plant.
The sliding mode control for the speed and torque control of an
induction motor is presentedin this work. It is based on the
mathematical model of an induction motor in the synchronous
rotating reference frame fixed in the rotor flux vector.
The reference torque is treated as a variable output signal of
the PI speed controller. The parameters of the PI controller are
taken into consideration in the design procedure of the sliding
mode control. The resulting sliding mode controller can thereby
ensure the stability of the whole system. We also presents a
fuzzy sliding mode control scheme to exhibit more robust
performance in the presence of the external load disturbances
and the parameter variations of plant. In the dissertation, the
controllers of sliding mode control and fuzzy sliding mode
control are designed. Performances of the speed control are
compared under various ac and dc load variations. The whole
induction motor speed control system is implemented by using a
high-speed digital signal processor with a personal computer. An
induction motor of 1 h.p. rated horsepower with driver circuits
are used to achieve the speed control task.