{"@type": "dcat:Dataset", "accessLevel": "public", "accrualPeriodicity": "irregular", "bureauCode": ["026:00"], "contactPoint": {"@type": "vcard:Contact", "fn": "Ole Mengshoel", "hasEmail": "mailto:ole.j.mengshoel@nasa.gov"}, "description": "Electrical power systems play a critical role in spacecraft and aircraft. This paper discusses our development of a diagnostic capability for an electrical power system testbed, ADAPT, using probabilistic techniques. In the context of ADAPT, we present two challenges, regarding modelling and real-time performance, often encountered in real-world diagnostic applications. To meet the modelling challenge, we discuss our novel high-level specification language which supports auto-generation of Bayesian networks. To meet the real-time challenge, we compile Bayesian networks into arithmetic circuits.  Arithmetic circuits typically have small footprints and are optimized for the real-time avionics systems found in spacecraft and aircraft. Using our approach, we present how Bayesian networks with over 400 nodes are auto-generated and then compiled into arithmetic circuits. Using real-world data from ADAPT as well as simulated data, we obtain average inference times smaller than one millisecond when computing diagnostic queries using arithmetic circuits that model our real-world electrical power system.\r\n\r\nReference:\r\n\r\n O. J. Mengshoel, A. Darwiche, K. Cascio, M. Chavira, S. Poll, and S. Uckun, \u201cDiagnosing Faults in Electrical Power Systems of Spacecraft and Aircraft\u201d, In Proc. of the Twentieth Innovative Applications of Artificial Intelligence, Conference (IAAI-08), Chicago, IL, 2008.\r\n\r\nBibTex Reference:  \r\n\r\n @inproceedings{mengshoel08diagnosing,\r\n  author    = {Mengshoel, O. J. and Darwiche, A. and Cascio, K. and Chavira, M. and Poll, S. and Uckun, S.},\r\n  title     = {Diagnosing Faults in Electrical Power Systems of Spacecraft and Aircraft},\r\n  booktitle     = {Proceedings of the Twentieth Innovative Applications of Artificial Intelligence\r\n                      Conference (IAAI-08)},\r\n  pages = {1699--1705},\r\n  address = {Chicago, IL},\r\n  year      = {2008}\r\n}", "distribution": [{"@type": "dcat:Distribution", "description": "Diagnosing Faults in Electrical Power Systems of Spacecraft and Aircraft", "downloadURL": "https://c3.nasa.gov/dashlink/static/media/publication/IAAI2008.pdf", "format": "PDF", "mediaType": "application/pdf", "title": "IAAI2008.pdf"}], "identifier": "DASHLINK_11", "issued": "2010-09-09", "keyword": ["ames", "dashlink", "nasa"], "landingPage": "https://c3.nasa.gov/dashlink/resources/11/", "modified": "2025-04-01", "programCode": ["026:029"], "publisher": {"@type": "org:Organization", "name": "Dashlink"}, "title": "Probabilistic Fault Diagnosis in Electrical Power Systems"}