From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-0.3 required=5.0 tests=BAYES_00, REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4 X-Google-Thread: 103376,7e8cebf09cf80560 X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!news4.google.com!feeder2.cambriumusenet.nl!feed.tweaknews.nl!87.79.20.105.MISMATCH!news.netcologne.de!ramfeed1.netcologne.de!newsfeed.arcor.de!newsspool4.arcor-online.net!news.arcor.de.POSTED!not-for-mail From: "Dmitry A. Kazakov" Subject: Re: How would Ariane 5 have behaved if overflow checking were notturned off? Newsgroups: comp.lang.ada User-Agent: 40tude_Dialog/2.0.15.1 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Reply-To: mailbox@dmitry-kazakov.de Organization: cbb software GmbH References: <4d80b13f$0$43832$c30e37c6@exi-reader.telstra.net> <4d8200ce$0$43837$c30e37c6@exi-reader.telstra.net> <4d820f84$0$6990$9b4e6d93@newsspool4.arcor-online.net> <4d835402$0$43840$c30e37c6@exi-reader.telstra.net> <4d8356e0$0$5764$882e7ee2@usenet-news.net> <05ec46e3-cc9c-406e-b4c9-3c1392726436@v31g2000vbs.googlegroups.com> Date: Fri, 18 Mar 2011 18:18:23 +0100 Message-ID: <1nc34bs4fccnm.zkmhfmyk46ep$.dlg@40tude.net> NNTP-Posting-Date: 18 Mar 2011 18:18:19 CET NNTP-Posting-Host: 5abfdd21.newsspool3.arcor-online.net X-Trace: DXC=N`SQT\^nE^;mi[6LHn;2LCVn[ On Fri, 18 Mar 2011 09:49:17 -0700 (PDT), KK6GM wrote: > However, (and this is > the case you and robin have been arguing, while ignoring the existence > of the redundant hardware in the first place), the last control system > in the chain (the 2nd one in this case) should obviously never shut > down, but should fall back to a limp-along mode, which of course may > or may not be good enough for the mission to succeed. I disagree. In the case of unrecoverable hardware malfunction you should bring the system into a safe state and if there is no one to a least damaging state. For an unmanned rocket self-destruction is likely such a procedure, because you don't want it falling upon your head. -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de