System Level Design Review

Transcription

1 System Level Design Review HABIP High Altitude Balloon Instrumentation Platform P17104 & P17105 October 6, 2016

2 Team Members Team Communications Data Acquisition and Control Systems Team Member Major Team Roles Other Roles Adam Steenkamer EE Project Manager Component Standardization Manager Connor Goldberg EE Lead Embedded Engineer Agency Compliance Manager Ian Prechtl ME Lead Mechanical Engineer Thermal Manager Matt Zachary EE Lead Hardware Engineer Wire Manager Sydney Kaminski ME Project Manager Weight, Volume, and Other Shared Mechanical Attributes Manager Lincoln Glauser EE Lead Embedded Engineer User Guide Documentor Chris Schwab EE Lead Hardware Engineer Power Manager Steven Giewont EE Lead Controls Engineer Instrumentation Package/Integrator 2

3 Agenda Morphological & Pugh Charts System Block Diagram Flow Diagrams Sub-Systems a. Structure b. Power Consumption & Thermal Routing c. Video Acquisition & Storage d. Microprocessors e. Battery Types f. IMU and Reaction Wheel g. ATV Transmitter h. 2m Transceiver 5. Future Plans 6. Additional Project Information 3

4 Morphological Chart - COMMS 4

5 Morphological Chart - COMMS 5

6 Pugh Chart - COMMS 6

7 Morphological Chart - DAQCS 7

8 Morphological Chart - DAQCS 8

9 Pugh Chart - DAQCS 9

10 Screening Matrix - DAQCS 10

11 Scoring Matrix - DAQCS 11

12 Concept Drawings 12

13 System Block Diagram 13

14 System Block Diagram (DAQCS) 14

15 System Block Diagram (COMMS) 15

16 Flow Diagram (Energy) Separate Batteries for System, GRSS, APRS Battery Power -> Regulators -> Parts -> Heat -> Structure -> Environment 16

17 Flow Diagram (Energy) Separate Batteries for System, GRSS, APRS Battery Power -> Regulators -> Parts -> Heat -> Structure -> Environment 17

18 Flow Diagram (Energy) Separate Batteries for System, GRSS, APRS Battery Power -> Regulators -> Parts -> Heat -> Structure -> Environment 18

19 Flow Diagram (Structure) Wind Force and HAB create torque, which is measured by IMU Controller reads this data, and commands the reaction wheel on and off 19

20 Flow Diagram (DAQCS) Sensors Raspberry Pi SD Card COMMS 20

21 Flow Diagram (COMMS) In general: DAQCS -> Microcontroller -> OSD & ATV Transmitter OR Transceiver 21

22 Platform Structure The Pill The Disk Disk 3 Layers (Top,Middle,Bottom) Increased Torque Control Req. Reduced External Inertial Effects Increased radial distance Reduced normal distance Pill Multi Layer Reduced Torque Control Req. Increased External Inertial Effects Reduced radial distance Increased normal distance 22

23 Platform Structure Pill Disk 3 Layers (Top,Middle,Bottom) Increased Torque Control Req. Reduced External Inertial Effects Increased radial distance Reduced normal distance Multi Layer Reduced Torque Control Req. Increased External Inertial Effects Reduced radial distance Increased normal distance The Disk 23

24 COMMS Power Consumption - Thermal Routing Thermal Routing Scenarios 1) 2) 3) Heat cannot be expelled fast enough Not enough heat is generated / stored Over the mission duration, components remain in operational range ----> From primary analysis, contrary to other projects, excessive cooling will not be an issue. Tested using air insulator distributed network -----> Next Step : Expand model to complete system

25 Microprocessors - Broadcom BCM2835 Chipset Full OS support (Linux) 2x I2C, 2xSPI, 1xUART, 1x1Wire Pros: - TI MPS430 MPU Bare Metal firmware Up to 8xSPI, 4xI2C, 4xUART Pros: Fully integrated MIPI camera interface Easy SD card access No HW validation for bringup Rapid prototype (<1hour for camera) $5 Cons: - - No FRAM memory Dependency on 3rd party HW High power usage (~250mA) - Low power FRAM memory Full access to all HW and documentation Cons: - Not capable of high-speed camera interfacing Requires a custom PCB (HW bringup) Requires special SD card driver 25

26 Video/Sensor Acquisition & Storage - Raspberry Pi Zero (x4) - Controls Raspberry Pi Camera - Controls local/external sensor acquisition - Direct storage to SD card - Raspberry Pi Camera v2.1-8mp (3280 x 2464 pixels) p30 video capture (adjustable) - Digital image stabilization - Len focus 1m to infinity - Photo: jpeg, raw, etc. Video: raw h Each Zero has its own I2C sensor network - Temperature, pressure - Data stored through Linux file system - Simply insert SD card into host PC for data retrieval - Or use scp over serial 26

27 Battery Types Ideal system battery: - Low resistance at low temperature, high energy density, non-explosive Most common rechargeable battery chemistries: Battery Chemistry Resistance vs. Temperature Energy Density Low Discharge Risk Form Factor NiCd Good Good No AA, AAA, 9V, C, D, multi-cell packs NiMH Good Good No AA, AAA, 9V, C, D, multi-cell packs Lead Acid Poor Poor No Sealed container (ex: car battery) Lithium Ion Best Best Yes multi-cell pouches, portable power docks Lithium Polymer Best Best Yes multi-cell pouches, portable power docks Alkaline Poor Poor No AA, AAA, 9V, C, D, multi-cell packs 27

28 DAQCS Power Estimate Major components - Sensor Acquisition and Storage (via Raspberry Pi Zero) - Sensor Power (temperature + pressure) - Reaction Wheel Controller Power (MSP430FRx and IMU) - Reaction Wheel Motor power System voltages are still TBD, therefore power is TBD ( based on component selection) Estimate of system current draw: System Current (ma) Notes Sensor Acquisition and Storage 4 x 250 = 1000 Four Zero s capturing 1080p30 Sensors 20 x 2 = 40 4 external, 4 internal, 12 redundant Reaction Wheel Controller 60 Reaction Wheel Motor TBD TOTAL: ~ Motor Based on motor selection / characterization 28

29 IMU & Reaction Wheel IMU s maximum sampling rate: Hz Angular acceleration of the instrumentation platform Difference in the angular acceleration of the instrumentation platform to the reaction wheel 29

30 ATV Transmitter Preliminary distance analysis shows we need close to 5W of output RF power for ATV This will need to be verified by testing the ATV system 30

31 ATV Transmitter PC Electronics TXA5-RCb Up to 1.5W out Used in METEOR 2005 Videolynx VM-70X Controlled 0.5-5W out High power consumption 31

32 2m Transceiver 32

33 Future Plans: COMMS Gantt Chart 33

34 Future Plans: COMMS Improved thermal analysis Structural analysis Part selection, especially: 2m Transceiver 70cm ATV Transmitter Improved weight, budget, & power consumption analyses Prototyping APRS GPS Analog camera & OSD unit Plans for other parts 34

35 Future Plans: DAQCS Gantt Chart 35

36 Future Plans: DAQCS Prototype camera, Raspberry Pi, and sensor interface Prototype of the reaction wheel & test set-up Environmental test procedures written Reaction wheel test procedure written Completion of BOM Completion of the majority of engineering documentation (i.e. models & drawings) 36

37 Questions? 37

38 Additional Information Slides 38

39 Concept Drawings - DAQCS 39

40 Concept Drawings - DAQCS 40

41 Functional Decomposition 41

42 Functional Decomposition 42

43 Functional Decomposition 43

44 Functional Decomposition 44

45 Additional Feasibility Completed - DAQCS Budget Feasibility Weight Feasibility Environmental Testing Chamber Feasibility Buzzer Feasibility 45

46 Budget Feasibility - DAQCS 46

47 Weight Feasibility - DAQCS 47

48 Environmental Chamber Feasibility - DAQCS Additional testing facilities are available in the CEMA lab in Slaughter. 48

49 Buzzer Feasibility - DAQCS Temperature Range: -20 to 65 degrees Celsius Storage Temperature: -40 to 85 degrees Celsius Sound Range: 92 to 103 db 49