Mecanica
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Publicado: 21 de octubre de 2010
LabVIEW for Motor Speed Control
NASA PAIR
Satyaveda Bharath Kalisha Robinson South Carolina State University
Project Title: Remote Data Acquisition and Motor Control via Internet for SpaceApplication Project Goal: To control position of a robot arm remotely via Internet Group Goal: We are responsible for the construction of the robot arm Preparation: Become familiar with LabVIEW Becomefamiliar with Pulse Width Modulation
I. II. III.
INTRODUCTION PROJECT DESCRIPTION CONCLUSION
INTRODUCTION
•
Open-Loop DC motor speed control system Pulse Width Modulation (PWM) isemployed to control the speed of the motor A virtual instrument (vi) is developed with LabVIEW The vi generates a triangular wave that produces the desired PWM signal. PWM is an analog that switchesbetween two predefined limits.
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•
•
•
INTRODUCTION
•
User inputs the amplitude and frequency of the triangular wave, sampling rate of the reference signal, and the desired amplitude ofthe PWM. As the reference voltage increases, the width of the PWM(duty cycle) increases which in turn increases the speed of the motor. The varying nature of the motor speed is demonstrated in thelaboratory by changing the reference signal. The principle developed in this project will be utilized in future endeavor toward controlling the robot motion remotely via Internet
•
•
• Project Description
The major components of the complete system include and input circuit, and output circuit, and a microcomputer with DAQ board and LabVIEW software.
Input Circuit
Computer & DAQBoard
Output Circuit
figure 1
Project Description
The input circuit shown in Fig. 2 is a simple voltage divider that employs a potentiometer and two power supplies. It provides a variablereference signal within a range of –15V and +15V.
Figure 2
Project Description
* In the output circuit , a dc motor is connected between the collector of the power transistor TIP 41 and the...
NASA PAIR
Satyaveda Bharath Kalisha Robinson South Carolina State University
Project Title: Remote Data Acquisition and Motor Control via Internet for SpaceApplication Project Goal: To control position of a robot arm remotely via Internet Group Goal: We are responsible for the construction of the robot arm Preparation: Become familiar with LabVIEW Becomefamiliar with Pulse Width Modulation
I. II. III.
INTRODUCTION PROJECT DESCRIPTION CONCLUSION
INTRODUCTION
•
Open-Loop DC motor speed control system Pulse Width Modulation (PWM) isemployed to control the speed of the motor A virtual instrument (vi) is developed with LabVIEW The vi generates a triangular wave that produces the desired PWM signal. PWM is an analog that switchesbetween two predefined limits.
•
•
•
•
INTRODUCTION
•
User inputs the amplitude and frequency of the triangular wave, sampling rate of the reference signal, and the desired amplitude ofthe PWM. As the reference voltage increases, the width of the PWM(duty cycle) increases which in turn increases the speed of the motor. The varying nature of the motor speed is demonstrated in thelaboratory by changing the reference signal. The principle developed in this project will be utilized in future endeavor toward controlling the robot motion remotely via Internet
•
•
• Project Description
The major components of the complete system include and input circuit, and output circuit, and a microcomputer with DAQ board and LabVIEW software.
Input Circuit
Computer & DAQBoard
Output Circuit
figure 1
Project Description
The input circuit shown in Fig. 2 is a simple voltage divider that employs a potentiometer and two power supplies. It provides a variablereference signal within a range of –15V and +15V.
Figure 2
Project Description
* In the output circuit , a dc motor is connected between the collector of the power transistor TIP 41 and the...
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