Project: P08371 Portable Command Post Rick Chadwick ME Harith Wijetungage IE Scott Pudlewski EE Sponsors:

Project Overview: Needs:  The customer was seeking a system to display Pictometry aerial images.  The system will be: self contained highly connective lightweight, portable Rugged easy to use economical. P08371 Portable Command Post

Project Overview: Final Design Specifications:  Will accept 12V DC and 120V AC Power  Will have multiple 3-4 Network Connections  Budget $ $3800  Target Weight Pounds  Battery Life Hours  Usable while being transported Backpack P08371 Portable Command Post

Solution Concept: Electrical Circuit Semi Ruggedized Laptop Computer Nexus Hawk Router Mechanical Chassis Weatherproof Enclosure  Pass Thru Panel for Electrical Connections  Cordless Mouse/Thumbwheel  Display Goggles P08371 Portable Command Post

Electrical System Components HP Laptop Computer  Power Supply to run from AC  DC Power Adapter Nexus Hawk Router  DC Power Adapter Ultralife Lithium Ion Battery  DC Battery Charger AC Power Supply DC Power Adapter AC to DC Power Converter Cooling Fan  Thermal Switch P08371 Portable Command Post

Electrical Circuit Features: Relays:  Isolate AC and DC inputs to prevent system damage  Disconnect battery from system so it can be charged  Prevent laptop from charging from the system battery Pressure Switches:  Keeps AC/DC converter from running while case is closed Prevents excess heat generation  Switches cooling fan off while case is closed  Powers laptop from AC input if case is closed Removable Connectors  Easier integration of electronics into case  Easier circuit testing access point P08371 Portable Command Post

Electrical Power Schematic: P08371 Portable Command Post

Mechanical System: Mechanical Chassis  Provide location and mounting for system components  Protect system components from shock and vibration SK 3I B Waterproof Case Backpack Harness System Electrical Pass-Through Panel USB: Qty 2 AC Power DC Power VGA Ethernet LED status indicators for system components P08371 Portable Command Post

Case Layout: P08371 Portable Command Post

Chassis: P08371 Portable Command Post

Testing Plan: Developed to test according to the customer specifications Tested the basic functionality of the PCP Design of Experiment techniques used to determine sample sizes Testing plan included drop and endurance tests that were waived due to the risk P08371 Portable Command Post

Testing Results: P08371 Portable Command Post TestSpec. No: StatusPassed/Faile d Remarks Time to Download an Image File CHANGED, Due to unknowns in file size, a bandwidth test was performed through each connection method 1CompletedPassedSee Accompanying Table Check for correct image-CompletedPassed Downloaded Image is Exactly the Same as Image on the Server -Waived Server access limits the possibility Time System will Function on Battery3Not Completed Not Completed due to time constraints Network Down Time5CompletedPassedSystem had 0% network downtime Pc boot-up time8Waived Current laptop is no the laptop used in the final product Usability9CompletedIncompletetested and passed with 3 people Processor Power11CompletedPassedSpecification value was 200 and benchmark obtained a value of 344 Display Brightness14CompletedFailedRecommend a laptop with an anti-glare screen Weight15CompletedPassedWeight is just at the specification limit of 30lb Vibration when the PCP is in use17Waived Due to limited resources Waterproof When Not in Use27Waived Due to limited resources Power Draw4Not Completed Not Completed due to time constraints and DC power not working properly Expansion SlotN/ACompletedPassed Power Level Indicator12CompletedPassed

Testing Results: Bandwidth P08371 Portable Command Post

Project Measurables: Final Cost:  $600  Projected Cost: Retail Parts Cost: $4300 Build Cost: $2600 Current Weight  30 Pounds  Projected Weight 27 Pounds P08371 Portable Command Post

Project Status: Functionality  AC power in works  Power distribution works  Battery and Laptop charge properly  AC/DC converter operates with lid switch Non-Funcionality  DC power in is not working properly P08371 Portable Command Post

Project Status: Recommendations Design Issues  Chassis does not account for taper of case  More thorough mounting means for components is necessary  Cooling system needs to be improved  Power Distribution needs to be implemented on a PCB  Wiring Harness needs to be developed Build Issues  Gremlins  Mounting P08371 Portable Command Post

Project Status: P08371 Portable Command Post Phase 0: Planning Phase 1: Concept Development Phase 2: System Level Design Present State: Phase 3: Detail Level Design Phase 4: Testing and Refinement 01234

Questions? P08371 Portable Command Post