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EE 330 Projects Fall 2011

EE 330 Projects Fall 2011 - EE 330 Fall 2011 Project List...

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EE 330 Fall 2011 Project List The project is to be worked upon in groups of no more than two people. Select a project from the following options. The projects are available on a first come first serve basis. Five groups total are allowed per project. Partially completed projects will not be accepted. You may work with a partner outside your lab section, however you must arrange with your TA to attend the same lab section. Deliverables A project report with appropriate organization is required. You will need to show any analytical work to design the circuit system. Include the schematic and also provide the layout for the circuit. The layout must pass DRC and LVS is applicable. Simulation should also be performed to verify the functionality of the circuit. In addition, you will be presenting the final outcome of the project to the instructor/TA. Use any visual aids as deemed effective.
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Project 1: Smart Braking Control An automaker would like to implement a safety feature in their vehicles that applies the brakes when information from a sonar sensor detects an impending collision. In order to prevent sonar misreads from activating the system, an IR sensor reading will be compared with the sonar sensor output to determine the proper course of action. The system will include an antilock braking algorithm to provide increased stopping power and control. Initially, the sonar and IR sensor will detect an object at a distance of about 5 meters and provide speed information at a rate of 39 kHz. The sonar sensor circuitry provides an 8-bit binary number corresponding to a speed where 00000000 is 0 kph and 11111111 represents 255 kph. The IR sensor provides a 5-bit output and follows the same linear relationship except it has a max speed detection of 180kph. At any speed above the maximum, the IR sensor will provide an output of 11111. The designed system will be able to compare the outputs from the two sensors and apply braking if the IR sensor speed reading is within 30% of the sonar sensor. For speeds above 180kph the IR sensor comparison will only check for the maximum output. Brakes will be applied based on the following set of equations: y = velocity/140 kph for 20 kph < velocity < 140kph y = 1 for velocity >= 140kph y = 0 for 0 kph < velocity <20 kph Where y is the braking percentage. Each wheel’s braking unit will accept a 4 -bit code corresponding to the braking percentage. Once again 0000 will provi de a brake application of 0% and 1111 will apply 100% of the brakes. Due to the vehicle’s weight shift under braking there will be a front/rear bias of 70/30. This is to say a braking percentage of 100% (y=1) will result in an application of 70% (1011) to each front wheel and 30% (0101) to each rear wheel. Finally, a magnetic sensor on each wheel will provide an rpm reading from 0 2200 rpm in the form of an 8-bit binary number at 39 kHz. If a wheel begins to slide its rpm will drop relative to other wheels.
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