Project

# Title Team Members TA Documents Sponsor
4 Jump Trading Simulation Interface
Design Award
David McKiernan
Jacob Clifton
Ryan Schmid
Rajarshi Roy appendix0.pdf
design_document0.docx
final_paper0.pdf
presentation0.presentation
proposal0.pdf
Currently, clinical simulators (full-body, robotic electromechanical devices) rely on computer-based input through a laptop computer. The computer interface is a complex series of screen-based inputs that are typically handled through keystrokes and the use of a mouse.

Our goal is to design a new user interface that is easier to use than the current model. The interface would allow the technician to manipulate key data quicker and more efficiently, thus allowing for a more realistic simulation experience. In addition, the technician would be better able to monitor student performance rather than staring at a screen.

We plan on using a micro-controller which will use a USB interface to talk to the computer that sets certain parameters for the "body" (Blood pressure, heart rate, respiratory rate, etc). The micro-controller will take data from various knobs, buttons, and a numeric key pad. The keypad will be used to enter a specific value and will be shown on a display prior to being uploaded to the computer. The knob(s) will be used to sweep certain parameters. The interface will allow the technician to sweep several parameters at the same time. The buttons will allow the operator to upload preset values to the computer (resting state, tachycardia, etc).

Control System and User Interface for Hydraulic Bike

Iain Brearton

Featured Project

Parker-Hannifin, a fluid power systems company, hosts an annual competition for the design of a chainless bicycle. A MechSE senior design team of mechanical engineers have created a hydraulic circuit with electromechanical valves, but need a control system, user interface, and electrical power for their system. The user would be able to choose between several operating modes (fluid paths), listed at the end.

My solution to this problem is a custom-designed control system and user interface. Based on sensor feedback and user inputs, the system would change operating modes (fluid paths). Additionally, the system could be improved to suggest the best operating mode by implementing a PI or PID controller. The system would not change modes without user interaction due to safety - previous years' bicycles have gone faster than 20mph.

Previous approaches to this problem have usually not included an electrical engineer. As a result, several teams have historically used commercially-available systems such as Parker's IQAN system (link below) or discrete logic due to a lack of technical knowledge (link below). Apart from these two examples, very little public documentation exists on the electrical control systems used by previous competitors, but I believe that designing a control system and user interface from scratch will be a unique and new approach to controlling the hydraulic system.

I am aiming for a 1-person team as there are 6 MechSE counterparts. I emailed Professor Carney on 10/3/14 and he thought the general concept was acceptable.

Operating modes, simplified:

Direct drive (rider's pedaling power goes directly to hydraulic motor)

Coasting (no power input, motor input and output "shorted")

Charge accumulators (store energy in expanding rubber balloons)

Discharge accumulators (use stored energy to supply power to motor)

Regenerative braking (use motor energy to charge accumulators)

Download Competition Specs: https://uofi.box.com/shared/static/gst4s78tcdmfnwpjmf9hkvuzlu8jf771.pdf

Team using IQAN system (top right corner): https://engineering.purdue.edu/ABE/InfoFor/CurrentStudents/SeniorProjects/2012/GeskeLamneckSparenbergEtAl

Team using discrete logic (page 19): http://deepblue.lib.umich.edu/bitstream/handle/2027.42/86206/ME450?sequence=1