基于圓度和圓柱度測(cè)量虛擬儀器的步進(jìn)電機(jī)控制系統(tǒng)畢業(yè)論文外文翻譯(存儲(chǔ)版)
【正文】 use of virtual instrument graphical programming software LABVIEW to control stepper motor has advantages such as simple hardware structure, simple programming, friendly interface, the portable program. In this paper LABVIEW is used to develop a threeaxis stepper motor control system. So the DM4240A twophase hybrid stepping motor and DMD402A stepper motor driver produced by LEETRO are selected in this project. Stepper motor control system . Hardware ponents Stepper motor control system hardware, shown in ,consists of puters (with LABVIEW applications), ADLINK 8134 motion control card (32 位 PCI bus, can control up to 4 axis), LEETRO DMD402A stepper motor driver (with chopping frequency of 20 KH, drive current range of A ~ 2 A), LEETRO DM4240A stepper motor (with stepping angle of , phase current of A, static torque of 16 , moment of inertia of 57 , weight of 240 g) and selfmade minitable body. Because only three axes on the workbench is needed to be controlled, so only three pins of motion control card is used, shown in . . Schematic of stepper motor control system . Connection Method In the device, the stepper motor is controlled by singleended connection. It should be aware of as following when the motor is linked to the motion control card ADLINK PCI8134 by direction, pulse and ground control Etc. Wiring method Shown in . Wiring Methods Jumpers of PCI8134 motion control card: Motion control card’s j 1j 8 connect to the 23 terminals. Motor driver’s resistance should not be less than K?. Because the current through the motion control card must not be more than 20 mA, so a K? resistor should be in series. . Software Development Tools The system software is developed by LABVIEW . The program prepared by LABVIEW platform known as the VI, each of which includes the front panel and rear panel. The front panel, which is the humanputer interaction interface, provides a large number of graphical display controls and data input controls, mainly to plete the initial data input and results display. Block program of rear panel consists of ports, node, frame and connection. Ports are used to transmit data. The nodes are used to achieve the functions and call the function. The frame is used to implement structured programming control. Connection presents stream of data during the program execution. . Stepper motor speed and position control As ADLINK PCI8134 motion control card can not directly match LABVIEW software, the motion functions provided by manufacturers can be called only after it is imported into the user library. Motion function library contains a wealth of motion functions, in the paper we select the Starttasmove () movement module to control the motor’s speed and position. The front panel shown in . Front panel of motor’s speed and position control The nu
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