Development Of Motor Speed Control System By Using Acceleration Characteristic At Forearm For Remote Control Car

Adam Farhan, Mohd Dasril (2013) Development Of Motor Speed Control System By Using Acceleration Characteristic At Forearm For Remote Control Car. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Speed control system is one of the systems that play an important role in the modern technologies with the use of actuators such as DC motors. The used of DC motors can be seen on toys like racing cars like remote control car (RC). Therefore, the speed control system is very important in this field because there are many users of this remote control car suffered damage as a result they are not able to control the speed of the toy car and even had to throw it away. Most of the remote control car is designed with speed that is constant and go forward and reverse only. In addition, the present remote control is also designed with a relatively large size and even has a lot of control buttons, thus hindering the users to control them. Therefore, the project is carried out to develop a motor speed control system by using ADXL345 accelerometer sensor that is placed in the forearm so that the motor can generate based on the desired speed when the acceleration features is detected. The relationship between position and distance were also analyzed so that the accelerometer sensor can provide a good input signal. For the motor speed control, PWM techniques (Pulse-Width-Modulation) are used because it is easy to operate. This control system is controlled by relationship where the higher degrees from its origin position (900), the faster the speed motor. Performance of the system then analyze in the two experiments. The first experiment is to determine the most suitable position among the five positions from the wrist until Antibranchial muscle (near elbow). While the second experiment, carried out to analyze the relationship between duty cycle and the motor speed rotation. The experiment is done by using different speeds while ensuring that the system is able to function in repeated usage. The results showed that the most suitable position sensor is at position 2 (0.18m from elbow) with the 20 angle offset which the minimum for all positions and the system can run with the average accuracy of 56.27% in repeated usage with varying speeds.

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