# Title Team Members TA Documents Sponsor
Alfredo Sanchez Sanchez
Francis Mui
Ran Wang
Ruhao Xia design_document1.pdf
**Problem**: Home parties often involve playing music. In order for the parties to be more exciting and attractive, a light system that change accordingly to the genre of the music can be added.
Proposed Solution: A system that automatically detects the sounds in a room and filters out the music being played, specify its genre, and controls the light's color, etc., to meet the music.
-**Detection Subsystem**: Sound sensors with an embedded DSP algorithm to detect and recognize if there's music being played in the environment, and send the recorded music to the control part. We are currently thinking about starting with available DSP algorithms for the music detection part. Some researches we are looking into include "Realtime Chord Recognition of Musical Sound: a System Using Common Lisp Music" by Takuya Fujishima, "Efficient Pitch Detection Techniques for Interactive Music" by Patricio de la Cuadra, and "Low-complexity Music Detection Algorithm and System" by Yang Gao.

-**Control Subsystem**: Compare the received data to the music pre-stored in a database, recognize the music's characteristics, and control the light patterns accordingly.

-**Light Subsystem**: Color changing LED light array. Behaves as a normal fluorescent lamp when no music is detected. The music sync LED strip lights that are on the market are designed primarily for specific uses like parties. They need to be powered and manually set up before each use and turn off the room lights, which is inconvenient. Our proposed project is more like an intrinsic setting for the room. It;s supposed to actively detect music in the environment, and when not in use, it will behave like a fluorescent lamp that we use every day. For a personal use example, if the user wants to play some comforting music and have a matching lighting condition, the system will automatically switch to gradually changing warm lights. When hosting parties, the lights can form more complex patterns with "enthusiastic" colors.

-**Power Subsystem**: Power distribution from the wall outlet to all the other subsystems.

**Additional Features**: Time permitting, we would like to add additional features to the control subsystem, including a user interface through which the user can switch between party and personal modes. In party mode, the system will behave more "enthusiastically", using warmer colors and changing color patterns with respect to the music's rhythm, pace and genre. Under personal mode, the system will be single-color, changes more gradually.

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):