《基于simulink的雙閉環(huán)直流調(diào)速系統(tǒng)的設(shè)計(jì)與仿真》畢業(yè)設(shè)計(jì)的英文翻譯

1、Simulation and Optimization of Parameters on DC Motor Double Closed-Loop Control System Based on Simulink Xiao-kan Wang 1 Zhong-liang Sun 1 Lei Wang1Shou-ping Huang 2Department of Mechanical and Electrical R at the s

2、ame time in the current control loop to set up a regulator, specifically for regulating the amount of current. Two regulators are set up for the adjustment of current and speed. Such a system known as current and spe

3、ed control system of DC motor.?The system which we called as double-loop speed control system of DC motor?[1,2]. II. System Modeling In order to exert speed and current negative feedback receptivity in the system, the

4、y will not mutually restrain and affect the property of the system, and set up two regulators in the system, and adjust speed and current respectively, implement cascade connections between the two. That is to say, w

5、e regard the output of speed regulator as the input of current regulator and then the output of current regulator control the initiating device of silicon controlled rectifier. From the outer structure of the closed-

6、loop feedback, the current adjustment loop in the inside loop, known as the inner loop; speed adjustment loop on the outside, known as the outer loop. This formed a double-closed-loop speed system of DC motor. In orde

7、r to obtain good static and dynamic performance, the two regulators of double closed-loop speed systems of DC motor adopt generally PI regulator [3]. Taking factors into account such as filtering, the dynamic structu

8、re chart of the actual double-loop speed system of DC motor is shown in Figure 1. In order to ensure the starting armature current value no more than the value allowed, voltage amplitude need to be limited on the back

9、 of speed regulator. In this way, when speed regulator turns into the saturation state, the output voltage is a saturated amplitude limit, corresponding to the maximum starting current allowed, and current loop is un

10、saturated, DC come true constant current to accelerate at the maximum current value allowed. In order to ensure security in debug, the limiter is also added on the back of current regulator. Ton = 0.01,Toi = 0.02,Ts=

11、0.0017,Tl=0.03,Tm=1/5.456,R=0.5,Kp=40,Ce=1/7.5 76??=0.007,?=0.05. (1) The indicators of steady-state: non-static error. (2) The indicators of dynamic: Current’s overshoot does not exceed 3%; Speed’s overshoot does no

12、t exceed 5%. The general principles of multi-loop control system in engineering design are that start from the inner loop and design outwardly one by one loop. To the double-loop speed control system of DC motor, we

13、should from the inner loop (the current circuit) firstly, in accordance with the requirements of Current control, determine what kind of typical system. The current loop correction should select the regulator and its

14、 parameters according to the object. Then, put the current loop equivalent to a small aspect of inertia as a part of the speed control loop. Complete the design of the outer loop (speed loop) with the same method. In

15、the concrete design process requires the control system which is static, the current overshoot no more than 3% and the speed overshoot no more than 5%.Then, the current equivalent of a loop small segments of inertia,

16、rotational speed as an integral part of the loop, and then complete the loop the same way (speed loop) design. In accordance with the above-mentioned principles of design, designers have asked a certain degree of exp

17、erience in design, basically control the classic “test“ and “up“ design. Here are using simulation optimization approaches to the design of the two parameters of the PI regulator. 2009 International Conference on Inte

18、lligent Human-Machine Systems and Cybernetics978-0-7695-3752-8/09 $25.00 © 2009 IEEE DOI 10.1109/IHMSC.2009.46 153given voltage amplitude is 10V, and take the initial values which I and P parameters of the speed lo

19、op are: P = 1, I = 1. Then we set objective function is IAE and simulation of the time is 0.5s. We may obtain the parameters optimization results are: P*=11.8417, I*=1.317. Figure 5 Step response curve of current loop

20、 (based on objective function 1) Figure 6 Step response curve of current loop (based on objective function2) Both the optimized parameters of the current loop and the speed loop will substitution in PI regulator of th

21、e figure 2. We may obtain step response curve of current and speed as shown in Figure7 by simulating. Speed overshoot is 0.61% and current overshoot is 0.54%. Obviously both of them can meet design requirements well.

22、 When the optimized regulator operating stability, the speed is 1428.6r/min which consistent with the expected speed 10/0.007=1428.6 r/min .so we achieve a regulator without error in the steady state. From the above

23、analysis we know that simulation curve characteristics of the designed regulator in line with the actual situation of DC motor double-loop speed control system. Figure 7 Speed curve and current curve (optimized) ?. Con

24、clusion DC motor double-loop speed control system is a typical multi-loop control system. For this kind of control system, the design method which uses is: from the inner to the outer loop, to design the controller on

25、e loop by loop. Here we use the parameter optimization techniques; we can quickly obtain the controller parameter which satisfies the design requirements through the simulation optimization, without any experience. I

26、n the outer loop controller's parameter carries on the process which gradually the simulation optimizes, similarly is also suitable for other kind of multi-loop control system. REFERENCES [1] Bo-shi Chen. Electric

27、 Drive Control System (the second edition).Beijing: Mechanical industry Press, 2002. [2] Min Jiang. Computer simulation of control System. Beijing: Publishing House of Electronics Industry, 2002. [3] Xiao-li Luo,

28、Gui-lin Fan. Design of DC Motor Speed-Adjustment System. Marine Electric & Electronic Engineering, 2006 (16)6:16-18. [4] Su-ping Wu, Fei Liu. Simulation of the Speed Control System for DC Motor Based on Fuzzy Logi

29、c. Journal of Changsha University of Electric Power (Natural Science), 2006 (21)4:34-37. [5] Wen-huo Zeng, Wan-li Zhou, Peng-cheng Zhu. The parameters optimum method of pseudo -derivative feedback algorithm for DC mot

30、or position control. Electric Machines and Control, 2006 (10) 6: 562-566. Address: on the 2nd ? Agricultural Road in Zhengzhou City of Henan Province, Henan Mechanical and Electrical Vocational Education Gropup Xiao-k