Volley Ball project

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Introduction The project goal was to design a durable volleyball practice and training system for use by high school volleyball players. The intended user should be able to position the apparatus and adjust the velocity, spin and trajectory of the volleyball. Constraints: The following constraints were developed for the design of an automated volleyball training apparatus; the device must: 1. Set, serve and spike a volleyball weighing 0.27 kg with a diameter of 0.21 m. 2. Set volleyball with no spin. 3. Simulate a spike of up to 130 kph. 4. Simulate a serve of up to 100 kph. 5. Have an adjustable height of up to 3 m. 6. Have an adjustable tilt range of 30 degrees. 7. Have an adjustable rotation of at least 90 degrees. 8. Not exceed 230 kg. 9. Be powered by 120 volt, 10 amp circuit. 10. Have a price cap of $10,000. Criteria: The following criteria will be used to distinguish among competing designs of an automated volleyball training apparatus: 1. Economical Design. 2. Adjustable velocity with a target range of 50-130 kph. 3. Set the ball with a target range of 3-5 m above the ground. 4. Do not launch ball at an unsafe speed over 130 kph. 5. Small footprint, with the goal of fitting through a doorway of dimensions 1.06m x 2.4m. Design Process The design process utilized various idea generation tools including a functional decomposition, brainstorming, a morphological chart, and a decision matrix. These elements of the design process resulted in an idea generation that was analyzed on practicality and achievement of the constraints and criteria. Functional Decomposition The design of the Volleyball Training Machine was broken down into 6 basic functions: setting, spiking, serving, providing stability, providing adjustability, and feeding the balls. Figure 1: Functional Decomposition of Volleyball

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