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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/PO6ZYMDFKGW7ODPQVCB5VJ7BV6Y3YCE7/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "PO6ZYMDFKGW7ODPQVCB5VJ7BV6Y3YCE7",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/234GFPAVXSFDL5OQJPG4HA4Z4NMJLEIY/?format=api",
    "sender": {
        "address": "w5did (a) amsat.org",
        "mailman_id": "8da25cae70294f3687f590ebe6fded03",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/8da25cae70294f3687f590ebe6fded03/emails/?format=api"
    },
    "sender_name": "Louis McFadin",
    "subject": "[eagle] Re: Power system thoughts and comments",
    "date": "2006-10-12T16:42:59Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/TID77CN5MLMTA6ACK2EYHWNGHURCJD4G/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/LTY63WWEQQKCUFRNF5QC4JO5NJLQML57/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "\nOn Oct 11, 2006, at 3:28 PM, Bdale Garbee wrote:\n\n> On Wed, 2006-10-11 at 09:41 -0700, Louis McFadin wrote:\n>\n>> One of the ways we planned to manage the system is to have deadbands\n>> on the buss voltage. Another way is to have a simple way that the\n>> units can communicate to each other as to their state.\n>\n> As we've discussed, this all needs to be designed very carefully, and\n> deserves careful review by a broad team.  Adding another bus of some\n> type to pass state information around between the various power\n> management devices seems attractive, but the more I've thought  \n> about it\n> the more I think we should try to minimize the amount of shared state\n> information and complexity.  If we can do it all with voltages on  \n> the DC\n> bus and suitable dead band definitions, that seems like a big win  \n> to me.\n> I'm certainly open to being convinced otherwise, though!\nI am with you on this. However I also believe it's good to have  \nadditional data exchanged between the units.\n\n>\n>> I have also been thinking of using a common system such as the IHU to\n>> send out a number which is it's opinion as to the voltage of the bus.\n>\n> That's an interesting thought.  The immediate difficulty I see is how\n> all these devices would be connected to the IHU... putting a CAN\n> controller on each certainly seems to be driving the complexity  \n> equation\n> the wrong way, and yet we really don't have any other communications\n> path to/from the IHU.  Perhaps some intermediate flavor where  \n> there's an\n> overall power management controller coordinating all these little\n> devices and interacting with the IHU makes sense, but keeping each of\n> the little units completely independent may be lower risk overall?\n>\n> Bdale\nI am thinking the we may need to have a power control module just for  \nthat purpose.\nThere needs to be some way for the IHU to communicate with the power  \nsystem even if we make it start up autonomously.\n\n>\n>\n\n",
    "attachments": []
}