某電機模糊PI調(diào)速仿真

隨著科技的進(jìn)步，無刷直流電機正被廣泛應(yīng)用到國防、航空航天、機器人、醫(yī)療器械、機密機床等領(lǐng)域中。電機控制的研究和應(yīng)用也日益受到人們的關(guān)注，學(xué)習(xí)和掌握無刷直流電機調(diào)速仿真技術(shù)，對今后的工作和學(xué)習(xí)具有重要意義。

本文建立了無刷直流電機數(shù)學(xué)模型，確定了立了雙閉環(huán)調(diào)速方案。在Matlab中，搭建了無刷直流電機雙閉環(huán)調(diào)速仿真模型，其中外環(huán)為速度環(huán)，分別使用傳統(tǒng)PI控制和模糊PI控制模塊，內(nèi)環(huán)為電流PI控制環(huán)。PI和模糊PI調(diào)速仿真結(jié)果表明，當(dāng)速度由1000r/min調(diào)節(jié)至500r/min時傳統(tǒng)PI調(diào)速經(jīng)過0.023s速度穩(wěn)定在500r/min，且存在較大的超調(diào)現(xiàn)象，調(diào)節(jié)過程中速度最小約為300r/min；而模糊PID調(diào)節(jié)僅需0.004s便可調(diào)節(jié)至500r/min，且不存在超調(diào)現(xiàn)象，模糊PI控制調(diào)速方法高于傳統(tǒng)PI控制。

關(guān)鍵詞：無刷直流電機；PI控制；模糊PI控制

Abstract 

With the advancement of science and technology, brushless DC motors are being widely used in the fields of national defense, aerospace, robotics, medical equipment, confidential machine tools and other fields. The research and application of motor control have also attracted increasing attention. Learning and mastering the simulation technology of brushless DC motor speed regulation is of great significance for future work and learning.

In this paper, a mathematical model of a brushless DC motor is established, and a double closed-loop speed regulation scheme is established. In Matlab, a double-closed loop speed regulation simulation model of a brushless DC motor is set up, in which the outer loop is a speed loop, using traditional PI control and fuzzy PI control modules, and the inner loop is a current PI control loop. The simulation results of PI and fuzzy PI speed regulation show that when the speed is adjusted from 1000r / min to 500r / min, the traditional PI speed is stabilized at 500r / min after 0.023s, and there is a large overshoot phenomenon, and the speed is the smallest during the adjustment. It is about 300r / min; while the fuzzy PID adjustment can be adjusted to 500r / min in only 0.004s, and there is no overshoot phenomenon. The fuzzy PI control speed regulation method is higher than the traditional PI control.

Keywords:brushless DC motor;PI control;fuzzy PI control

目錄

摘要I

第一章 緒論1

1.1. 研究背景及意義1

1.2. 國內(nèi)外研究現(xiàn)狀1

第二章 無刷直流電機模糊PI控制系統(tǒng)3

2.1. PID調(diào)速原理3

2.2. 無刷直流電機數(shù)學(xué)模型4

2.3. 模糊PI控制5

2.3.1. 模糊控制器5

2.3.2. 模糊PID控制器的設(shè)計6

第三章 傳統(tǒng)PI控制調(diào)速仿真7

3.1. 無刷直流電機本體模塊7

3.2. 逆變器模塊8

3.3. PI 調(diào)節(jié)器模塊8

3.4. PWM發(fā)生模塊9

3.5. 邏輯換相模塊10

3.6. Powerguimo模塊11

3.7. PI控制仿真結(jié)果11

第四章 模糊PI控制調(diào)速仿真12

4.1. 模糊推理系統(tǒng)12

4.2. 模糊規(guī)則建立13

4.3. 速度環(huán)模糊PI仿真模型14

4.4. 模糊PI調(diào)速仿真結(jié)果14

參考文獻(xiàn)16

致謝18