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1、第 1 頁 共 16 頁中文 中文 3517 字, 字,2150 英文單詞, 英文單詞,1.1 萬英文字符 萬英文字符文獻出處: 文獻出處:Ohri S S K J. LabVIEW Based DC Motor and Temperature Control Using PID Controller[J]. International Journal, 2013, 3(5),56-63.LabVIEW Based DC Motor
2、and Temperature Control Using PID Controller Salim Sunil Kumar Jyoti OhriElectrical DepartmentElectrical Department Electrical Department(NIT Kurukshetra) (NIT Kur
3、ukshetra)(NIT Kurukshetra)India India IndiaAbstract— LabVIEW is a graphical programming language. LabVIEW provides the flexibility of integration of data acquisition software/h
4、ardware with the process control application software for automated test and measurement applications. In this paper, an effort is made to control the speed of the DC motor and figure out the design process of a PID temp
5、erature controlling system of the electromagnetic oven using LabVIEW software. By LabVIEW-aided PID controller, the parameters are adjusted to control the motor speed and to control the temperature of Electromagnetic ove
6、n. Design of controller by applying several methods in analyzing controlled parameters to tune parameter in order to obtain the best process response.Keywords— LabVIEW, DC Motor, Electromagnetic oven Temperature Control,
7、 PID controller, PID tuning method.I. INTRODUCTIONVirtual instrument is a computer instrument system. The system is based on the computer including a lot of hardware equipment and the consumer design the virtual panel an
8、d procedure to achieve the testing and controlling aim. In recent years, virtual instrument technology has been applied extensively in various fields, such as industrial control, communication, automation electric power
9、and electronic and industrial production. DC motors have been popular in the industry control area for a long time, because they have many good characteristics, for example: high start torque characteristic, high respons
10、e performance, easier to be linear control etc. There are different control approaches which depend on the different performance of motors. The basic property of DC motor is that speed can be adjusted by varying the term
11、inal voltage. Tuning of PID parameters should be done to get the optimal response. This paper is to design PID controller to supervise and control the speed response of the DC motor with the virtual instrument graphic mo
12、nitor software LabVIEW and also describes a simulation that involves designing, building, and demonstrating a regulatory control system. There are many algorithms/methods proposed in literature for tuning of PID controll
13、er such as Process reaction curve, Ziegler Nichols method, Tyreus and Luyben. Lab-VIEW is the graphical development environment for creating flexible and scalable test, measurement, and control applications rapidly and a
14、t minimal cost. The structure of this paper is mainly divided into the? Mathematic model of DC motor and electromagnetic oven? PID control theory and Tuning Algorithm? Lab view software simulation resultsII. MATHEMATICAL
15、 MODEL OF DC MOTOR AND ELECTROMAGNETIC OVEN第 3 頁 共 16 頁There are many methods proposed for tuning of PID controller. We have used the following four methods for tuning [18].? ·Process reaction curve (Open-loop)?
16、183;Ziegler Nichols method (Closed-loop)? ·Tyreus and LuybenProcess reaction curve (Open-loop): This is a manual procedure which is based on measuring the step response of the system .The input variable r(t) is chan
17、ged from to ;the output c(t) is monitored carefully and the step response recorded on a chart recorder. Here r(t) should be as small as possible. On the recorded output, draw a tangent to enable the following measuremen
18、ts:TM R ?Empirical relationships in terms of KP , KJ , KD for P, PI, and PID are by process reaction curve is given in Table.1Table.1 shows process reaction curve parametersType of controllerP- - - -PI- 3.33L -PID0.5L 2
19、L 0.5LZiegler Nichols method (Closed-loop): Ziegler- Nichols is a type of continuous cycling method for controller tuning. The term continuous cycling refers to a continuous oscillation with constant amplitude and is bas
20、ed on the trial-and-error procedure of changing the proportional gain (KP ). KP is reduced from larger value till the point at which the system goes to unstable state i.e. the point at which the continuous oscillations o
21、ccurs. Thus the gain at which system starts oscillating is noted as ultimate gain (KU) and period of oscillations is ultimate time period (KU ). It allows us to use the ultimate gain value, Ku, and the ultimate period of
22、 oscillation (Pu ) to calculate Kc . These two parameters, Ku and Pu are used to find the loop-tuning constants of the controller (P, PI, or PID) using the formula tabulated in Table 2.Table 2. Shows Ziegler Nichols para
23、metersControllerP 0.5 ? 0PI 0.45 0PID 0.6The advantage of this method is that it is a proven online method and includes dynamics of whole process, which gives a more accurate picture of how the system is behaving. The di
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