MECH466 - Lecture18-RelativeStability2009W

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Unformatted text preview: ! 0 -1.5 -2 0 0 0 -2 -4 0 0 0 -2.5 -3 -6 0 0 0 -2 10 -1 0 1 2 MECH466 : Automatic Control 13 2008/09 Announcements 0 10 1 10 2 MECH466 : Automatic Control 14 Nyquist stability criterion gives not only absolute Nyquist absolute but also relative stability. relative MECH466_LabSchedule_0809 (Mar 5).pdf MECH466_LabSchedule_0809 Final exam Final Absolute stability: Is the closed-loop system stable or Absolute stability: closednot? (Answer is yes or no.) Relative stability: How “much” is the closed-loop Relative stability: much” closedsystem stable? (Margin of safety) Date & time: April 21 (Tue), 3:30pm-6pm Date 3:30pmPlace: CHBE101 Place: Policy change Policy • One letter-size cheat sheet (you can use both lettersides of the sheet) is allowed. • The cheat sheet must be written by hand by yourself! MECH466 : Automatic Control 10 Some remarks Lab 4 starts next week. See the schedule in Lab 2008/09 -1 The phase lag causes instability of the closed-loop closedsystem, and thus, the difficulty in control. 3 Routh-Hurwitz is NOT applicable! Routh2008/09 10 Relative stability is important because a Relati...
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This document was uploaded on 03/05/2014 for the course MECH 466 at University of British Columbia.

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