1 / 20

International Space Station Command and Data Handling

Objectives. Command and Data Handling (CDH) components and architectureMDM SystemsRussian Equipment. CDH Components. Multiplexer/Demultiplexers (MDMs)Military Standard 1553B busPortable Computer System.. MDMs. Hierarchical StructureCrew/Controllers interface to one tierLimited by the bus and

abedi
Download Presentation

International Space Station Command and Data Handling

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. International Space Station Command and Data Handling Aleksandrs Kruza

    2. Objectives Command and Data Handling (CDH) components and architecture MDM Systems Russian Equipment

    3. CDH Components Multiplexer/Demultiplexers (MDMs) Military Standard 1553B bus Portable Computer System.

    4. MDMs Hierarchical Structure Crew/Controllers interface to one tier Limited by the bus and processing power

    5. MDM Hardware

    6. MDM Hardware Mass Storage Device (MSD) 300 MB Hard Drive used to store essential data while the station is out of contact with the ground. Also stores back up application software for other MDMs

    7. MDM Maintenance Upon Assembly Complete there will be 44 MDMs on station with an expected failure rate of 19.5 per year that will require crew maintenance. Each MDM as well as its cards and chassis, are can be replaced and considered Orbital Replacement Units (ORUs)

    8. Mil-Std 1553B Bus Used to connect MDMs between the tiers and locally. Connects the Russian Service Module Central Computer to the US C&C MDM A bus controller can connect up to 31 remote terminals Three data rates of .1, 1 , and 10 Hz

    9. PCS User level Interface with the CDH allows the crew to control core station systems such as GNC and EPS. Uses a IBM ThinkPad 760XD commercial-off-the-shelf (COTS) laptop

    10. PCS Software Command and Data Software Display Software 1553 Software Command Software File and Memory Transfer Software Caution and Warning Software Time Services Status (bus or laptop)

    11. MDM Systems

    12. C&C MDMs Only MDM on tier 1 Dual fault Tolerant Responsible for overall control and monitoring of the CDH system

    13. INT MDMs Tier 2 Single fault tolerant Primary duty is to control ECLSS functions

    14. Power Management and Control Unit (PCMU) MDMs Controls primary power distribution, PEPS Thermal Control System, and the Electrical Power System Single fault tolerant

    15. GNC MDMs Controls navigation, attitude determination, and attitude control (non-propulsive) Can request the Russian SMTCSW to command the Russian Thrusters. Unique because both MDMs are always running due to the long load times in their software

    16. External (EXT) MDM Monitors and Controls the various truss elements such as the Mobile Transporter, External Active Thermal Control System, and the EPS system Single fault tolerant

    17. Payload (PL) MDMs Monitor, controls, and coordinates payloads aboard the ISS Contains two of the five MSDs on the station and the High Rate Data Link

    18. Russian Equipment

    19. Russian Computers Different design philosophy (???) Service Module Central Computer (TBM) Terminal Computers Interfaces with the US computers only on a high level and share information such as vehicle modes, Caution and Warning, and MDM health and status The GNC MDM and the Service Module TBM exchange state vector, mass property, attitude, and attitude rate information Neither system can actively control the other system

    20. Questions???

More Related