Design And Development Of A Multimode Cricket Bowling Machine

This research was about the development of a multimode cricket bowling machine. The purpose of the machine was to emulate the ball deliveries of real cricket bowlers during training. Furthermore, the machine could execute continuous ball deliveries for the batsmen when the bowlers are not available....

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Main Author:	Davaraj, Fernandez Dhanaraj
Format:	Thesis
Language:	English
Published:	2017
Subjects:	T Technology
Online Access:	http://eprints.usm.my/47414/1/Design%20And%20Development%20Of%20A%20Multimode%20Cricket%20Bowling%20Machine.pdf
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id	my-usm-ep.47414
record_format	uketd_dc
spelling	my-usm-ep.474142021-11-17T03:42:14Z Design And Development Of A Multimode Cricket Bowling Machine 2017-08-01 Davaraj, Fernandez Dhanaraj T Technology TK1-9971 Electrical engineering. Electronics. Nuclear engineering This research was about the development of a multimode cricket bowling machine. The purpose of the machine was to emulate the ball deliveries of real cricket bowlers during training. Furthermore, the machine could execute continuous ball deliveries for the batsmen when the bowlers are not available. Besides that, past studies had not disclosed some of criteria related to the development of the bowling machine such as effects of wet ball on velocity and speed relationship between the ball and the wheels. In response, a multimode cricket bowling machine was fabricated and its performance analysed. Based on the kinematics of the bowling deliveries, the design requirements of the machine were made prior to fabrication. As for the control system, a rule-based microcontroller system was constructed to change the wheel’s angular speed. The three major experiments for analysing the performance were ball velocity, distance, and spin. Experimental results showed that ball velocities were 17.53 m/s and 19.78 m/s under slow and medium speed mode with best wheel pressure of 6.25 psi on both wheels. The data consistency was compared using coefficient of variation (COV). From the velocity results, the speed ratio between the ball’s translational velocity and wheel’s linear velocity was obtained. Due to the steep speed ratio gradient, the ball velocity declined after the wheels achieved an angular speed of 2000 rpm at 6.25 psi. Moreover, the trajectory results of the mathematical model simulated was comparable to the measured ball length with error of 0.67 %, 9.31 %, and 12.49 % for slow-horizontal, medium-horizontal, and medium-rolled tests respectively. For the ball spin experiments, the speed ratio equation was used to estimate the ball spin rate with 12.32 % error. Based on the estimation, the ball spin rate decreased as the wheel’s angular speed increased. Furthermore, simulations for the ball trajectory with spin applied were conducted and analysed. The simulations had shown that the ball spin produced ball trajectory effects in line with the implemented rule-based system but the magnitude of the effects was low due to the speed ratio relationship and also the initial ball release angle from the horizontal plane. 2017-08 Thesis http://eprints.usm.my/47414/ http://eprints.usm.my/47414/1/Design%20And%20Development%20Of%20A%20Multimode%20Cricket%20Bowling%20Machine.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Elektrik & Elektronik
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	T Technology T Technology
spellingShingle	T Technology T Technology Davaraj, Fernandez Dhanaraj Design And Development Of A Multimode Cricket Bowling Machine
description	This research was about the development of a multimode cricket bowling machine. The purpose of the machine was to emulate the ball deliveries of real cricket bowlers during training. Furthermore, the machine could execute continuous ball deliveries for the batsmen when the bowlers are not available. Besides that, past studies had not disclosed some of criteria related to the development of the bowling machine such as effects of wet ball on velocity and speed relationship between the ball and the wheels. In response, a multimode cricket bowling machine was fabricated and its performance analysed. Based on the kinematics of the bowling deliveries, the design requirements of the machine were made prior to fabrication. As for the control system, a rule-based microcontroller system was constructed to change the wheel’s angular speed. The three major experiments for analysing the performance were ball velocity, distance, and spin. Experimental results showed that ball velocities were 17.53 m/s and 19.78 m/s under slow and medium speed mode with best wheel pressure of 6.25 psi on both wheels. The data consistency was compared using coefficient of variation (COV). From the velocity results, the speed ratio between the ball’s translational velocity and wheel’s linear velocity was obtained. Due to the steep speed ratio gradient, the ball velocity declined after the wheels achieved an angular speed of 2000 rpm at 6.25 psi. Moreover, the trajectory results of the mathematical model simulated was comparable to the measured ball length with error of 0.67 %, 9.31 %, and 12.49 % for slow-horizontal, medium-horizontal, and medium-rolled tests respectively. For the ball spin experiments, the speed ratio equation was used to estimate the ball spin rate with 12.32 % error. Based on the estimation, the ball spin rate decreased as the wheel’s angular speed increased. Furthermore, simulations for the ball trajectory with spin applied were conducted and analysed. The simulations had shown that the ball spin produced ball trajectory effects in line with the implemented rule-based system but the magnitude of the effects was low due to the speed ratio relationship and also the initial ball release angle from the horizontal plane.
format	Thesis
qualification_level	Master's degree
author	Davaraj, Fernandez Dhanaraj
author_facet	Davaraj, Fernandez Dhanaraj
author_sort	Davaraj, Fernandez Dhanaraj
title	Design And Development Of A Multimode Cricket Bowling Machine
title_short	Design And Development Of A Multimode Cricket Bowling Machine
title_full	Design And Development Of A Multimode Cricket Bowling Machine
title_fullStr	Design And Development Of A Multimode Cricket Bowling Machine
title_full_unstemmed	Design And Development Of A Multimode Cricket Bowling Machine
title_sort	design and development of a multimode cricket bowling machine
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Elektrik & Elektronik
publishDate	2017
url	http://eprints.usm.my/47414/1/Design%20And%20Development%20Of%20A%20Multimode%20Cricket%20Bowling%20Machine.pdf
_version_	1747821772841943040

Design And Development Of A Multimode Cricket Bowling Machine

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