{"action":"created","issue":{"url":"https://api.github.com/repos/tbeu/Modelica/issues/108","repository_url":"https://api.github.com/repos/tbeu/Modelica","labels_url":"https://api.github.com/repos/tbeu/Modelica/issues/108/labels{/name}","comments_url":"https://api.github.com/repos/tbeu/Modelica/issues/108/comments","events_url":"https://api.github.com/repos/tbeu/Modelica/issues/108/events","html_url":"https://github.com/tbeu/Modelica/issues/108","id":196555351,"number":108,"title":"Problem with model \"Lossy Gear\" and approach to a solution","user":{"login":"modelica-trac-importer","id":22202507,"avatar_url":"https://avatars.githubusercontent.com/u/22202507?v=3","gravatar_id":"","url":"https://api.github.com/users/modelica-trac-importer","html_url":"https://github.com/modelica-trac-importer","followers_url":"https://api.github.com/users/modelica-trac-importer/followers","following_url":"https://api.github.com/users/modelica-trac-importer/following{/other_user}","gists_url":"https://api.github.com/users/modelica-trac-importer/gists{/gist_id}","starred_url":"https://api.github.com/users/modelica-trac-importer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/modelica-trac-importer/subscriptions","organizations_url":"https://api.github.com/users/modelica-trac-importer/orgs","repos_url":"https://api.github.com/users/modelica-trac-importer/repos","events_url":"https://api.github.com/users/modelica-trac-importer/events{/privacy}","received_events_url":"https://api.github.com/users/modelica-trac-importer/received_events","type":"User","site_admin":false},"labels":[{"id":503777658,"url":"https://api.github.com/repos/tbeu/Modelica/labels/bug","name":"bug","color":"ee0701","default":true},{"id":503784383,"url":"https://api.github.com/repos/tbeu/Modelica/labels/Mechanics.Rotational","name":"Mechanics.Rotational","color":"0000aa","default":false}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":4,"created_at":"2016-12-20T00:26:46Z","updated_at":"2016-12-20T00:27:45Z","closed_at":null,"body":"**Reported by &#x43;hristian&#46;&#66;ertsch&#x40;d&#x65;&#x2e;bos&#x63;h&#x2e;c&#111;m on 6 Oct 2008 14:31 UTC**\n<sub>(This ticket was rejected by the spamfilter previously and is now added by Dietmar Winkler (dietmarw) again.)</sub>\n\nFor the decision what side of the gear is he driving one, the implementation within the Modelica library uses the cut torque  tau_A as described in the paper [ Pelchen C., Schweiger C., and Otter M.: \"Modeling and Simulating the Efficiency of Gearboxes and of Planetary Gearboxes,\"](http://www.modelica.org/Conference2002/papers/p33_Pelchen.pdf)\n\nInstead `tau_A - tau_bf,A` should be used.\nThe difference plays a role only in cases where the driving side is not obvious (see attachment).\nAn example is given, where this leads to a not convergent solution.\nThe error occurs with MODELICA Standard library 2.2.2 within Dymola 6.1; in the code of Modelica Standard Library 3.0 the problem still exists.\n\n----\n\nMigrated from https://trac.modelica.org/Modelica/ticket/108"},"comment":{"url":"https://api.github.com/repos/tbeu/Modelica/issues/comments/268118663","html_url":"https://github.com/tbeu/Modelica/issues/108#issuecomment-268118663","issue_url":"https://api.github.com/repos/tbeu/Modelica/issues/108","id":268118663,"user":{"login":"modelica-trac-importer","id":22202507,"avatar_url":"https://avatars.githubusercontent.com/u/22202507?v=3","gravatar_id":"","url":"https://api.github.com/users/modelica-trac-importer","html_url":"https://github.com/modelica-trac-importer","followers_url":"https://api.github.com/users/modelica-trac-importer/followers","following_url":"https://api.github.com/users/modelica-trac-importer/following{/other_user}","gists_url":"https://api.github.com/users/modelica-trac-importer/gists{/gist_id}","starred_url":"https://api.github.com/users/modelica-trac-importer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/modelica-trac-importer/subscriptions","organizations_url":"https://api.github.com/users/modelica-trac-importer/orgs","repos_url":"https://api.github.com/users/modelica-trac-importer/repos","events_url":"https://api.github.com/users/modelica-trac-importer/events{/privacy}","received_events_url":"https://api.github.com/users/modelica-trac-importer/received_events","type":"User","site_admin":false},"created_at":"2016-12-20T00:27:45Z","updated_at":"2016-12-20T00:27:45Z","body":"**Comment by diet&#x6d;a&#114;w on 11 Sep 2009 22:20 UTC**\nChristian Bertsch and Max Westenkirchner have worked on a corrected version of `LossyGear`. \nSee: \n * [attachment:CB_package.mo CB_package.mo] for the changed implementation `my_Lossy_gear` and some testcases\n * [attachment:Lossy-Gear-Bug_Solution.pdf Lossy-Gear-Bug_Solution.pdf] for a detailed documentation of the new implementation\n"}}
{"actor":{"display_login":"modelica-trac-importer"}}