lan gender fer honors presentation

7/28/2019 Lan Gender Fer Honors Presentation

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Golf Ball Speed Analysis

Apparatus

By: Dan and David LangenderferFaculty Mentor: Dr. H. El-Mounayri

ENGR 196 Honors Project, Dec. 2001


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Outline of Presentation

Original Intent 1st conceptual design

Flaws in 1st design

2nd conceptual design

Flaws in 2nd design

Motion of apparatus

Final design

Changes to finaldesign

Components

Animation at 30

Animation at 25

Graphs of

acceleration, velocity,forces, and position

Limitations

Possible

Improvements


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Original Intent of Project

Find speed of baseball after being hit by a

bat.

Slow the measuring apparatus down.

Design apparatus to have relatively no

vibration.


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1st Design


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Flaws in 1st Design

The parts would have to be big to with

stand speed.

The arms used to slow the mechanism

down may fly apart.

The joints would not be pin joints,instead they would have to pivot.


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2nd Design


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Flaws In Second Design

The spring would have a large recoil

velocity.

The recoil velocity could injure the

player or break his equipment.

The parts would have to be rigid andstrong for their size.


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Motion of Apparatus

Forces applied by the putter to the ball.

Ball arm pivots on center shaft, while arrow

indicates speed of initial impact.

Spring attached to ball arm counteracts the

initial impact of the putter.

Ball returns to initial position.


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Final Design


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Changes In Final Design(Throughout Process)

Removed the spring from the shaft.

Connected arrow to the ball-arm.

Added half-sphere to the stop.


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Components of Final Design

Base Feature

Ball-Arm

Top Retainer

Indicator Arrow

Putter Spring (Removed from final assembly do to

complications in Pro Mechanica).


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Base Feature


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Ball-Arm


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Top Retainer


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Indicator Arrow


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Putter


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Spring


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Assembly

Aligned center axis of base feature with

center axis of the ball-arm.

Mated the ball-arm, indicator arrow, and topretainer.


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Initial Conditions

Putter Angle1 = 0.5236

radians

Velocity = 0.17244radians per second

Angle2 = 0.4363radians

Velocity = 0.17244radians per second

Ball arm

Angle1 = 0 radians

Velocity = 0 radians

per second

Angle2 = 0 radians

Velocity = 0 radians

per second


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Animation at 30

(click on image)


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Animation at 25

(click on image)


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Results Angular Acceleration

Angular Velocity

Joint Force

Joint Torque

Shoulder Force

Shoulder Torque

Point Acceleration

Point Position

Point Velocity


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Angular Acceleration

-350

-300

-250

-200

-150

-100

-50

0

50

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

-4

-3

-2

-1

0

1

2

3

4

5

Pivot Joint Shoulder

-350

-300

-250

-200

-150

-100

-50

0

50

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

-4

-3

-2

-1

0

1

2

3

4

5

Angle

25

Angle

30

A

ngularAcceleration

(radians/second2)

Time (seconds)

AngularAcceleration

(radians/secon

d2)

Time (seconds)


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Angular Velocity

-40

-30

-20

-10

0

10

20

30

40

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

-1

-0.5

0

0.5

1

1.5

2

Pivot Joint Shoulder

-40

-30

-20

-10

0

10

20

30

40

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

-1

-0.5

0

0.5

1

1.5

2

Angle

25

Angle

30

AngularVelocity

(radians/second)

Time (seconds)

AngularVelocity

(radians/second)

Time (seconds)


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Joint Force

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

Pivot Joint

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

Angle

25

Angle

30

Force(pounds)

Time (seconds)

Force(pounds)

Time (seconds)


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Joint Torque

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

Pivot Joint

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

Angle

25

Angle

30

Time (seconds)

Time (seconds)


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Shoulder Force

Angle

25

Angle

30

Force(pounds)

Time (seconds)

Force(pounds)

Time (seconds)

2.4

2.6

2.8

3.0

3.2

3.4

3.6

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

Shoulder

2.4

2.6

2.8

3.0

3.2

3.4

3.6

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4


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Shoulder Torque

Angle

25

Angle

30

Time (seconds)

Time (seconds)

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

Shoulder

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4


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Point Acceleration

Angle

25

Angle

30

AngularAcceleration

(radians/second2)

Time (seconds)

AngularAcceler

ation

(radians/secon

d2)

Time (seconds)

-1000

0

1000

2000

3000

4000

5000

6000

7000

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

Ball Arrow Tip

-1000

0

1000

2000

3000

4000

5000

6000

7000

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4


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Point Position

Angle

25

Angle

30

Distance(radians)

Time (seconds)

Distance(radia

ns)

Time (seconds)

0

2

4

6

8

10

12

14

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

Ball Arrow Tip

0

2

4

6

8

10

12

14

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4


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Point Velocity

Angle

25

Angle

30

AngularVelocity

(radians/second)

Time (seconds)

AngularVelocity

(radians/second)

Time (seconds)

-20

0

20

40

60

80

100

120

140

160

180

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

Ball Arrow Tip

-20

0

20

40

60

80

100

120

140

160

180

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4


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Limitations

Scale is not calibrated.

Indicator arrow does not help golfer findvelocity, distance, or force.

Linear spring may affect results.

Ball-arm hits support for scale. Motion never stops.


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Possible Improvements

Different source of resistance.

Move support for scale.

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