1. Protective Crane Design
ET 494- Senior Design Spring 2017
Professor: Dr. Chris Koutsougeras
Advisor: Dr. Ho-Hoon Lee
Katelyn Cockrell
Curtis Blank
Jared Bush
Zane Jacob

2. Design Goal
Design a protective crane to be used for protection against falls.
Design and fabricate a sensor and trolley system that will detect the movement of the worker in order to keep the worker directly under the anchor point on the boom of the crane.
The crane needs to be fairly mobile for different terrains and to allow the user to move freely.
Alex

3. Our Goals
Use the skills learned through this project and our curriculum to become a valuable asset to future employers.
Gain a full understanding of project design, planning, and cost estimation.
Develop a safe and cost sensitive crane design.
Alex

4. Tasks Completed Last Semester
We calculated and configured the overall design of the trailer and crane.
We used programs such as COMSOL and AutoCAD Inventor. These programs helped us test our design to ensure everything was working properly.

5. Spring 2017 Goals
Complete full structural analysis of crane structure in COMSOL and Autodesk Inventor.
Design redundant locking mechanism for fall arrest.
Design a sensor to monitor position of the worker.
Successfully design trolley system with active position monitoring capabilities.
Fabricate a prototype of the trolley and controls for proof of concept.

6. Trolley
We will design and fabricate a motorized trolley that will move along our I-beam boom
The trolley will be controlled by a sensor that identifies the worker’s position.
We plan to use a PID loop to control a bidirectional DC motor controller.
There will be no brake needed in the trolley, we will use the motor torque to keep the motor static when necessary.
Curtis

7. Locking Mechanism
We will study a previous senior design project and incorporate it in our design if it is suitable.
It includes a accelerometer to measure the slip, trips and falls. Also includes seatbelt tether which is locked by a solenoid. The program that is used for this is Arduino.
We will also design a secondary locking mechanism in case the primary mechanism fails.

8. Deliverables Stress analysis of combined full scale model
Primary member: Curtis Blank
Secondary member(s): Jared Bush
Design and construction of motor control (Sensing)
Design and construction of motor control (Control)
Primary member: Zane Jacob
Secondary member(s): Katelyn Cockrell
Katelyn

9. Deliverables cont. Design and construction of impact reducing spring
Primary member: Jared Bush
Secondary member(s): Curtis Blank
Design and construction of locking mechanism
Primary member: Katelyn Cockrell
Secondary member(s): Zane Jacob
Design and construction of back up locking mechanism
Primary member: Zane Jacob
Secondary member(s): Katelyn Cockrell
Katelyn

10. Deliverables cont. Construction of entire trolley system prototype
Primary member: Jared Bush
Secondary member(s): Curtis Blank, Zane Jacob, Katelyn Cockrell
Construction of boom prototype
Primary member: Katelyn Cockrell
Secondary member(s): Curtis Blank, Zane Jacob, Jared Bush

11. Timeline
January: Create proposal. Meet with Dr. Lee to acquire approval for proposed semester’s work.
February: Work on COMSOL load analysis. Complete calculations for spring force fall arrest mechanism. Design angle sensor and locking mechanisms. Work on design of trolley.
March: Finish prototype for trolley by the end of the month. Begin functionality testing.
April: Testing and debugging controls.
May: Write final proposal and presentation.
Jared

12. Questions?
Alex