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Main Menu |
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NJAV Goals |
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1) Improve the design and implementation of the 2008 vehicle.
2) Have a working vehicle by the End of December 2009.
3) Have an optimal vehicle by the beginning of May 2010.
4) Take 1st in the 2010 IGVC Competition. |
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Project Progress |
Steve Liccketto
Project Journal Entries:
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September 18
The first meeting with our Advisor, Dr. Hernandez, after we have
gotten all the confusion with the project settled. From me
he wanted a Hardware Architecture of the proposed electrical
system.
September 27
The unsatisfactory hardware architecture needed to be re-done
and approved before progress could be acheived.
October 5
The rebuilt hardware architecture is redone and redrawn below.
It awaits approval but I am progressing towards initial designs
of a complete power board for the vehicle.
October 12
Analysis of last years voltage drop circuitry was successful.
I re-organized the circuitry of the designed voltage regulator
circuits and minimized used components. The implementation
of the board from last year will remain the same; however, the
board will be added to the circuitry of the main power
board/box.
October 20
A main power board is going to be designed and implemented in
the 2009-2010 vehicle design. The power interface will
contain voltage drops from 24 Volts DC to 12 Volts and 5 Volts.
The circuit will be completely contained by an originally
designed enclosure composed of Garolite. This material was
recommended by another SR. project group. The Garolite was
ordered from McMaster-Carr.
October 22
Tests for the motors and batteries was a must to determine the
usability of these components. Both DC motors that drive
the vehicles proved to function properly.
The battery tests were not as satisfactory as I had hoped.
The vehicle used two different configurations of six batteries
total. Each of these batteries are 12 Volts DC. When
measuring the voltage of 12 Volt batteries, a fully charged
battery will display 12.8 Volts and a depleted battery will
display 11.4 Volts. Any number outside of this range can
damage the battery from overcharge or discharge voltage damage.
Battery 1: 11.6 Volts
Battery 2: 8.2 Volts
Battery 3: 12.7 Volts
Battery 4: 11.2 Volts
Battery 5: 11.4 Volts
Battery 6: 11.1 Volts
Battery 3 is the only good battery. Battery 2 has been
dangerously discharged and is possibly damaged. The team
needs to locate or purchase a charger to charge the dead
batteries and test if they can hold a charge as they should.
Motor Controller Device: Roboteq AX3500
This is a fully programmable board designed to control two
separate DC motors individually. The wiring diagram is
extremely basic, there are specified attachments from specified
terminals on the board.
October 26
Power Board Circuitry Color Code:
Red --- 24 VDC
Orange --- 12VDC
Yellow --- 5 VDC
Black --- Ground
October 30
The power board is completely wired and implementable. The
wireless E-stop has been wired directly into the circuitry of
the power board. When the "ON" Button on the remote is
pressed the board will have power; in conjunction, when the
"OFF" Button is pressed no power is supplied to the board.
November 3
Power Box: The power board must be encased in a type of
box to limit dust and dirt and to help with an organized
structure. After measuring the completed circuit and with
keeping the cooling fan in mind, the box should be about 8" x 8"
x 4". It will contain a cooling fan on top and the
electrical terminals on the sides.
The power board is planned to be cut and assembles by 11/8/09.
After the completion of the Power Box, the vehicle will be
completely wired to the 2008-2009 frame so test runs can be
acheived.
After the vehicle is wired and capable of being tested by Mike
Coffey. I will begin to work on a speed feedback system
and battery monitor device, if there is time. Also, I will
work closely with the Mechanical Engineers in designing the new
chassis to help develop the organization of the Hardware Device
mounts and brackets.
Future Priorities:
Finish Power Box / Board
Wire Vehicle
Help with Design of Vehicle
Design Speed Feedback System
Design Battery Monitor
Look Into Having PCB made for Power Board |
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NJAV Updates |
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09/18/09 -
Time line of work progress was created and
is being used as a guide to complete the project. Recovery
of last years vehicle and expense reports completed.
09/27/09 - Hardware
architecture of the old vehicle was completed and analyzed.
The hardware architecture was unsatisfactory, so a rebuild is
required.
10/16/09 - Preliminary Drawings were
constructed by the Mechanicals for a new chassis. The
Electrical engineer designed a universal power box where the
voltage from the batteries will be inputted and various voltages
will be outputted to supply the vehicle with all the power
required. The wireless e-stop is wired directly into the
circuitry of the power box. The Computer Engineer has
began testing each component to develop code and draw data.
10/30/09 - The circuitry for the power
box has been created and soldered but the actual housing has not
been constructed although it has been designed. Progress
for the collection of data has been moving forward and there are
few components left to gather data from. Mechanicals are
now furthering their original design to include a more stable
camera mount.
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