BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:US/Eastern BEGIN:DAYLIGHT DTSTART:20170312T030000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:EDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20171105T010000 TZOFFSETFROM:-0400 TZOFFSETTO:-0500 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:EST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20171001T032653Z UID:A268E13C-A190-11E7-8752-0050568D2FB3 DTSTART;TZID=US/Eastern:20171026T110000 DTEND;TZID=US/Eastern:20171026T121500 DESCRIPTION:This is an introduction to the describing functions and its use in analyzing some common nonlinearities. Linear frequency response method s that ignore these nonlinearities fail to predict limit cycle oscillation s. The describing function method discussed herein predicts them. Books\, at least as far back as 1955\, and various contemporary online description s contain discussionss of the describing function. This is an account of u sing the describing function to predict limit cycles. Frequency response m ethods work well with single input single output linear feedback systems e ven those that have some form of nonlinearity such as a slightly nonlinear gain. These generally yield to approximation by linear elements. There ar e\, however\, some common nonlinearities containing abrupt transitions tha t fail to yield to linearizing approximations. These often cause limit cyc le oscillations. Three such nonlinearities are dead zone\, saturation\, an d the infinite gain limiter. The describing function is based on these ass umptions:\n\n- Circulation of higher harmonics through the loop attenuates them so only a miniscule amount of higher harmonic energy returns to the nonlinearity\n- Nonlinearity produces no subharmonics or DC\n- Nonlinearit y in the loop exists in one transfer function.\n\nCo-sponsored by: WIE\n\n Speaker(s): Lecturer: Mr. Alan Lipsky\, \, Lecturer: Mr. Alan Lipsky\, \n\ nAgenda: \n11:00 am - 11:10am Introduction\n\n11:10am - 12:00pm Mr. Lipsky 's Lecture\n\n12:00pm - 12:10pm Questions and Answers\n\nRoom: 247\, Bldg: Lupton Hall\, SUNY College at Farmingdale\, Farmingdale\, New York\, Unit ed States LOCATION:Room: 247\, Bldg: Lupton Hall\, SUNY College at Farmingdale\, Farm ingdale\, New York\, United States ORGANIZER:Signal@ieee.li SEQUENCE:6 SUMMARY:Describing Function Analysis of Control Systems with Common Nonline arities URL;VALUE=URI:https://events.vtools.ieee.org/m/47255 X-ALT-DESC:Description: <br /><p>This is an introduction to the describing functions and its use in analyzing some common nonlinearities. Linear freq uency response methods that ignore these nonlinearities fail to predict li mit cycle oscillations. The describing function method discussed herein pr edicts them. Books\, at least as far back as 1955\, and various contempora ry online descriptions contain discussionss of the describing function. Th is is an account of using the describing function to predict limit cycles. Frequency response methods work well with single input single output line ar feedback systems even those that have some form of nonlinearity such as a slightly nonlinear gain. These generally yield to approximation by line ar elements. There are\, however\, some common nonlinearities containing a brupt transitions that fail to yield to linearizing approximations. These often cause limit cycle oscillations. Three such nonlinearities are dead z one\, saturation\, and the infinite gain limiter. The describing function is based on these assumptions:&nbsp\;&nbsp\;</p>\n<ul>\n<li>Circulation of higher harmonics through the loop attenuates them so only a miniscule amo unt of higher harmonic energy returns to the nonlinearity</li>\n<li>Nonlin earity produces no subharmonics or DC</li>\n<li>Nonlinearity in the loop e xists in one transfer function.</li>\n</ul><br /><br />Agenda: <br /><p>11 :00 am - 11:10am Introduction</p>\n<p>11:10am - 12:00pm Mr. Lipsky's Lectu re&nbsp\;</p>\n<p>12:00pm - 12:10pm Questions and Answers</p> END:VEVENT END:VCALENDAR