# Title Team Members TA Documents Sponsor
50 Home Energy Administration Tool
Edward Choi
Jae Min Song
Jee Haeng Yoo
Nicholas Ratajczyk design_review
How much do you pay for the electricity at home? Have you ever thought of saving energy? But do you even know how much energy is consumed by each appliance?

In order to spend electricity efficiently, I came up with the idea of developing an administrative tool that not only controls the power, but also keeps track of each device's energy consumption. I am trying to implement this on simplified house model for this project. The tool will enable user to (1) remote control power at home on web application using smartphone and (2) monitor detailed information- time, amount, and usage pattern- on energy consumption of electronics or lighting at home through charts- also on the web application. I expect this tool to allow people to be aware of their spending and to cut down electricity bill.

I am planning to construct a house model with snap-in receptacles so that I can plug in actual electronic devices that use 120V AC. I would also need components to measure power dissipation of each receptacle.

There will be a designed PCB that runs all components in the house model. PCB will also include esp32- this allows hosting a web server- and a micro-controller to display information on web server so that it allows user to remote control power and monitor energy consumption.

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):