System Definition Review NASA Wireless Smart Plug Experimental Control Logic Labs September 19th, 2012

SDR Agenda Team Members Vision, Mission, Goal and Objectives of Project Concept of Operations System Architecture (includes system definition, concept and layout) Level 1 Requirements Traceability of requirements “flow down” Work Breakdown Structure (WBS) Technical Assessment Preferred system solution definition Preliminary functional baseline Preliminary system software functional requirements Risk assessment and mitigations approach Design & Analysis tools to be used Cost and schedule data Hardware & Software Test Matrix Akeem

Team Members Paul Delaune NASA Technical Subject Matter Expert Dr. Joseph Morgan MISL Director Matthew Leonard NASA Liaison Capstone Team MISL Team Dr. Jay Porter Capstone Advisor Akeem Akeem Whitehead Project Manager Derek Garsee Software Engineer Jeffrey Jordan Hardware Engineer Christian Carmichael Systems Integration Engineer

Mission Goals and Objectives Create a control/monitoring system for DC power distribution on NASA Deep Space Habitat (DSH) Remotely configurable from Master Control Software (MCS) Automated monitoring and control of current draw Akeem

Concept of Operations NASA Wireless Smart Plug (NWSP) is a proof-of-concept prototype Installed in the Deep Space Habitat (DSH) mock-up for testing and evaluation purposes only (not space qualified) Used to monitor and control power usage of DSH and its installed equipment Monitor current draw from targeted device, and define actions based on measurement (i.e. wireless communication, emergency disconnect, load shedding). Akeem

NASA Wireless Smart Plug System Architecture NASA Wireless Smart Plug 120V-DC or 28V-DC 120V-DC and/or 28V-DC 1 sample/second ISA100.11a IEEE 802.15.4 Typical Device Akeem Windows OS LabVIEW GUI DSH Network Nivis VersaRouter 900 Master Control

NASA Wireless Smart Plug System Architecture x5 NASA Wireless Smart Plug 120V-DC or 28V-DC 120V-DC and/or 28V-DC 1 sample/second ISA100.11a IEEE 802.15.4 Typical Device Akeem Windows OS LabVIEW GUI DSH Network Nivis VersaRouter 900 Master Control

System Breakdown NWSP Sensing & Control MSP430F5438 Wireless Communications VersaNode 210 VersaRouter 900 Client Software LabVIEW GUI Configuration & Display Akeem

Level 1 System Requirements Power Control Support for 120V/28V DC Near real-time monitoring/control Fail safe Windows based master control client Communications Wireless configuration, control, monitoring and reporting Data rate: 1 sample/second Use a Nivis VN210 radio Support a Nivis VR900 router Standards: UART, ISA 100.11a Form Factor & Fit Small form factor Cannon-type connector Integration with DSH Deliver five NWSP units for evaluation Derek

Requirements Flow Down 1/3 Power Control Voltages Monitor Fail Safe Threshold GUI 28VDC 0 to 5A 0 to 5A Standalone Executable Akeem Monitor and switch voltage 28 V DC 120 V DC Monitor power Up to 5 A Accurate to within ± 3% of full scale Set and control power 0 to 5 A 0.1 A increments Trips if greater than set point 120VDC 3% Full Scale 0.1A Inc. Windows OS Trips

Requirements Flow Down 2/3 Communications Data Rate Equipment Protocol 1 sample/s Nivis VN210 ISA100.11a IEEE 802.15.4 Akeem Near real-time monitoring/control 1 sample / second Trip within 3 seconds of over-current Graphical User Interface LabView standalone executable (with source code) Operate on Windows 7 based master control computer Non-wired communications Communicate directly with Nivis VersaRouter 900 onboard the DSH Nivis VersaNode 210 Trip Within 3s Nivis VR900 UART

Requirements Flow Down 3/3 Form Factor & Fit Size Integration 3” x 3” x 3” 5 NWSP Akeem Size of AC to DC adapter No larger than 3” x 3” x 3” Low power consumption TI MSP430F5438 Disconnect power from load upon device failure Fuse is blown Processor dies Not connected to master control Deliver and install 5 NWSP units Cannon-type Connector DSH Install

Project Work Breakdown Structure Overview 1/9 Total # of Boxes: 147 Project = 1 Phases = 7 Activities = 21 Tasks = 51 Sub-Tasks (Terminal Element) = 67 Total # of Work Packages: 106 Akeem

WBS Phase Level 2/9 Akeem

WBS 1.0 Research 3/9 Akeem

WBS 2.0 Design 4/9 Jeff

WBS 3.0 Simulation 5/9 Chris

WBS 4.0 Implementation 6/9 Derek

WBS 5.0 Testing 7/9 Akeem

WBS 6.0 Documentation 8/9 Chris

WBS 7.0 Close-out 9/9 All documents, development tools, and code will be transferred to MISL for final systems integration and deployment with NASA DSH Chris

Technical Assessment: Current Sensor Device Pros Cons Cost ACS714 Hall Effect Small packaging 5 v input voltage 5A range 100 mV/A output $3.89 ACS754 Low power loss 1.2% full scale error Higher load capacity 50 A range 10 mV/A output Relatively expensive $7.00 ACS759 Quick response time Relatively low accuracy 56 mV/A output 12.5 A range

Preferred System Solution Processor MSP430F5438 Wireless Communication VersaNode 210 VersaRouter 900 Current Sensing ACS714 Power Switching: G9EA-1 DC Power Relays Regulation: TI TL783 Linear Regulator Client Software LabVIEW Jeff P: Alternative solutions Note: Defined vs selectable i.e. Technology Assessment Slide (1 example) ref. NASA solution (price / lead time; MicroPac)

Preliminary Functional Baseline Functional Block Diagram Akeem

Power Budget Device Max Current Draw VersaNode210 60 mA MSP430F5438 312 uA ACS714 Current Sensor IC 13 mA Voltage Regulator   120V-DC Enable Circuit Selection Circuit Voltage Measurement Circuit

Preliminary System Software Functional Requirements Master Control Unit Communicate wirelessly with NWSP Add/Configure NWSP units Receive and display NWSP information NWSP Receive parameters from MCS Perform auto disconnect Control and monitor power usage Report current draw to MCS Jeff - Updated

MCS Example GUI Jeff – Added for SDR v9

PMI Risk Management Process Identify Evaluate Develop Response Control Derek Identification: determining which risks will affect the project and documenting the characteristics of each. Evaluate: evaluating risks and risk interactions to determine what risks will affect the project, their likelihood, and their impact. Response: defining steps to act on opportunities, reduce risk likelhood and impact, and respond to threats. Control: Respond to changes in risk over the course of the project.

Risk Prioritization Matrix Priority Total Overall Risk Comparison 3 High 1. Project goes overschedule 5 1 Low 2. Injury or damage from 120V source 2 6 3. Funding delayed 1 2 3 3 4. Delay in parts procurement. 1 2 3 4 4 4 4 5. Solving 120V/28V available power problem 1 2 3 4 5 5 5 5 Medium 6. Limited financial resources 1 2 3 4 5 6 6 6 6 6 Derek The “Value” Column is the integer weight it was assigned by the Risk Evaluation Table. The “Comparison” column is the actual comparison of one risk against another where the more critical risk is red. Every time a risk is found to be more critical it is added to each risks running sum in the “Priority” column. The risk with the highest priority is considered to be the risk of highest urgency as previously mentioned.

Risk Evaluation 5 4 6 1 3 2 HIGH LOW HIGH LOW PROBABILITY OF OCCURRENCE LOW Legend Project over-schedule Injury/damage from 120V Funding delayed Delay in parts Solving 120V step-down Limited financial resources Derek HIGH LOW SEVERITY OF IMPACT

Design & Analysis Tools to be Used NI Multisim Simulation OpNet NI Ultiboard PCB design LabVIEW GUI Inventor Enclosure Code Composer Studio MSP430 Programming Capstone Design Tools Jeff – Updated for v7 Talk about capstone Design Tools: What are they? How they help? Differences b/w NASA and Capstone

Preliminary Cost Budget NASA Cost Sharing Labor $40,915 Travel $3,000 Equipment $5,000 (TI) ODCs $5,000 Overhead/Indirect $22,501 (TAMU) _____________________________________________ Total Cost to Sponsor $48,915 $27,501 Chris

Schedule Jeff – Updated v9 Changes: Changed weeks to dates, Extended to end of 420.

Test Matrix Akeem

NASA Deliverables Date Activity Deliverable 1/8/12 Kickoff Meeting Draft System Design Process (SDP) 19/9/12 SDR Presentation Power Point Slides Video 24/10/12 PDR Presentation 5/12/12 CDR Presentation 10/12/12 Final SDP Report Weekly Project Status Meetings 13/2/13 Progress Checkpoint #1 Presentation and PPT Slides Alpha Schematic Alpha Board Layout Software Hierarchical Charts Test Matrix 5/3/13 Final Design Review Presentation and PPT Slides 3/4/13 Progress Checkpoint #2 Final Schematics Final Board Layout Software Flow Charts Test Plan 15/5/13 Progress Checkpoint #3 Final Demonstration 20/5/13 Final Presentation Final Report Five Smart Plugs 15/6/13 Integration with DSH Field Test Plan 15/8/13 DSH Integrated Testing Field Test Report 15/9/13 Final Acceptance 

Questions/Comments

Clarifications How many measurements per observation i.e. multiple array of values versus a single value) How long is the measurement process to remain active considering 1 sample/second Multiple measurement analysis i.e. averaging, sliding windows, statistical, etc. How will the limits be defined i.e. 2.9A is devices actual limit, 3.0A is the ideal limit, trip occurs at 3.1A threshold Trip response? i.e. circuit breaker, fast-blow fuse, slow-blow fuse, etc. How many NSWP devices will be used in actual implementation of DSH? 8-bits of addressing versus 64-bits of addressing