MECH466 - Lecture19-FrequencyDomainSpecifications-2009W

Models for systems electrical mechanical

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Unformatted text preview: ctromechanical Linearization Design Time response • Transient • Steady state Design specs Root locus Frequency response • Bode plot Frequency domain PID & Lead-lag Lead- Stability • Routh-Hurwitz Routh• Nyquist Design examples Matlab simulations & laboratories 2008/09 MECH466 : Automatic Control 9 Controller design comparison 2008/09 MECH466 : Automatic Control 10 Feedback control system design Design specifications in time domain (Rise time, settling time, overshoot, steady state error, etc.) C(s) C(s) G(s) G(s) Controller Plant OL: CL: Approximate translation Desired closed-loop closedpole location in s-domain s- Desired open-loop openfrequency response in s-domain s- Root locus shaping Frequency response shaping (Loop shaping) 2008/09 MECH466 : Automatic Control 11 Given G(s), design C(s) that satisfies CL stability Given G(s), C(s) and time domain specs, i.e., transient and steady-state responses. steadyWe learn typical qualitative relationships We between open-loop Bode plot and time-domain opentimeresponses. 2008/09 MECH466 : Automatic Control 12 3 Typical desir...
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