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Abstract
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Article Information:
A Software Method for Generating Concurrent Pwm Signal from Pic18f4520 for Biomimetic Robotic Fish Control
M.O. Afolayan, D.S. Yawas, C.O. Folayan and S.Y.Aku
Corresponding Author: M.O. Afolayan
Submitted: March 02, 2012
Accepted: March 12, 2012
Published: June 25, 2013 |
Abstract:
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A method of generating multiple pulse width modulated signal with phase difference is presented in this work. The microcontroller used is PIC18F4520 and its output is used to drive Futaba RC servo motors directly. The concurrency of pulse width modulated signal in this work is relative, due to the fact that there is a finite time (microcontroller period) between each instruction toggling the output pins. This finite time is equal to the minimum period of the microcontroller, which is 125 ns in this work. Also, the phase difference for the servo motors is set to 60o and is achieved by changing the duty cycle of each of the channels while the period remains at 20 ms for all the channels. The robotic fish using this software PWM code was able to attain a linear speed of 0.985 m/s.
Key words: Biomimetic, concurrent PWM, fish robot, PIC microcontroller, Software PWM, ,
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Cite this Reference:
M.O. Afolayan, D.S. Yawas, C.O. Folayan and S.Y.Aku, . A Software Method for Generating Concurrent Pwm Signal from Pic18f4520 for Biomimetic Robotic Fish Control. Research Journal of Applied Sciences, Engineering and Technology, (05): 754-760.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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