# Title Team Members TA Documents Sponsor
20 Self-Standing Monopod
Diyu Yang
Jianan Gao
Xin Chen
Luke Wendt design_document0.pdf
Group member: Diyu Yang, Xin Chen, Jianan Gao

Problem Description: When doing photography we usually needs tripods to stablize our camera. However, the problem with a tripod is that it's heavy to carry, difficult to setup, and it does not have too many shooting angles for the camera. Plus it requires a perfectly flat ground to use tripod, which is somewhat inconvenient for photographers.

Our proposal to this problem is to design an auto-standing monopod. The monopod would take advantage of PID control. There would be pendulms attached to the end of the pod, and by changing the angular velocity of the pendulums we would be able to make the pod balance by itself under any circumstances.

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:

Team using IQAN system (top right corner):

Team using discrete logic (page 19):