Lecture 1 – Negative Feedback. Talk by Prof. Robert Gregg, UT-Dallas, Tuesday 3:30 – 4:30pm,...
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- Lecture 1 Negative Feedback
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- Talk by Prof. Robert Gregg, UT-Dallas, Tuesday 3:30 4:30pm,
Geddes Hall Lower Level Auditorium
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- (Stein, G., IEEE Control Systems Magazine, 2003)
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- Natural Systems: Lotka-Volterra Predator-Prey Model
Time-DomainPhase-Portrait (full nonlinear dynamics)
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- Engineered Systems: Watt Governor (www.wikipedia.org) James
Watt invented the centrifugal governor in 1788. This is widely
considered to be the first engineered control system. Designed
without a mathematical analysis. Analysis didnt come until James
Clerk Maxwell derived the stability conditions in 1868.
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- Engineered Systems: Watt Governor (Sotomayor, et al.,
2006)
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- Air Temperature Control (B. Li, et al., IFAC Cont. Eng. Prac.,
2010) Air Conditioning Control Turn compressor on Turn compressor
off
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- Engineered Systems: NASA X-29 forward-swept-wing aircraft NASA
X-29 (Wikipedia.org) Schematic of angle of attack (Wikipedia.org)
Forward-swept-wing design enables larger angles of attack Also
makes the design statically unstable (center-of-gravity (cog) is
aft of center-of-pressure (cop)) Advantages of better
maneuverability in the supersonic flight regime Towards the back
Schematic of cog and cop (http://www.rockets4schools.org/)
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- Engineered Systems: NASA X-29 forward-swept-wing aircraft
https://www.youtube.com/watch?v=4TDS_jV1DEg
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- Simple Flight Control (Franklin, Powell, 2002)