DSP Scholar Team
From ECE Department Wiki
This is the page for the 2007-2008 DSP Scholar Team.
Contents |
Group Description
The primary goal of the Digital Signal Processing (DSP) Scholar Team (ST) is to develop, from the ground up, a useful DSP system, including both hardware and software components. In meeting this goal, DSP ST participants 1) improve their DSP competence, particularly from a hardware perspective, 2) increase their awareness of DSP-related applications and research, 3) develop industry-marketable design and tool skills, and 4) hopefully have fun.
The DSP Scholar Team is comprised of a select group of NDSU undergraduate and graduate students advised under the direction of Dr. Roger Green. In past years, the DSP ST developed a DSP-based system for audio applications, including a digital stereo equalizer. This DSP system formed the foundation for several subsequent senior design projects including, among others, a probabilistic music generator.
Currently, the team's focus is on the construction of a DSP-controlled desk-top inverted pendulum. To achieve this goal, the DSP ST is divided into four subgroups: 1) PCB layout, 2) sensors, 3) coding and algorithms, and 4) support circuitry. Each group meets weekly to develope their respective subsystem. Weekly team meetings facilitate communication between subgroups and ensure overall project management objectives are met. It is anticipated that an initial prototype of the DSP-controlled desk-top inverted pendulum will be completed by the end of Fall 2007.
Current Project
Inverse Pendulum
Currently, the team's focus is on the construction of a DSP-controlled desk-top inverted pendulum. To achieve this goal, the DSP ST is divided into four subgroups: 1) PCB layout, 2) sensors, 3) coding and algorithms, and 4) support circuitry. Each group meets weekly to develope their respective subsystem. Weekly team meetings facilitate communication between subgroups and ensure overall project management objectives are met. It is anticipated that an initial prototype of the DSP-controlled desk-top inverted pendulum will be completed by the end of Fall 2007.
Task Groups
DSP Layout
Members
(Coming Soon)
Coding and Algorithms
Members
Support Circuitry
Members
Budget
Misc. Research
Optical Position Tracker
We are exploring the possibility of using an optical device much like that inside of a ball mouse to track the movement of the pendulum.
It might be to our advantage to use some of the circuitry that is already existing on the mouse's circuit board, including the sensors. Some pinout and data transmission information can be found here:
http://pinouts.ru/Inputs/PS2Mouse_pinout.shtml
http://www.computer-engineering.org/index.php?title=PS/2_Mouse_Interface
http://computer.howstuffworks.com/mouse2.htm - This page offers a simple explanation at the bottom for how it works with 2 sensors to distinguish which direction the wheel is turning:
http://www.4qdtec.com/meece.html - Another explanation of how the 2 sensors allow determination of direction.
Magnetic Position Tracker
Another possibility is using a magnet and several sensors to track the position of the pendulum.
Battery Capacities
Alkaline batteries do not live up to their claimed mAh ratings (ballpark 2800mAh) under high loads. NiMH batteries will do better, but typically have a lower rating (which is more realistic). NiMH should outlast alkaline in high load conditions, which was cited as being something like a digital camera.
The older NiCd battery chemistry can supply a higher current than typical NiMHs, so NiCds are commonly used to power model cars or other relatively high-current-draw devices. New NiMH AAs designed for high current applications are beginning to become available. These use different construction and have lower capacity (1400–1600 mAh) than the highest capacity NiMH batteries.
http://michaelbluejay.com/batteries/ http://en.wikipedia.org/wiki/AA_battery http://www.greenbatteries.com/batterymyths.html
External Links
- Digital Signal Processing, Wikipedia Article
