Talk by Prof. Robert Gregg, UT-Dallas, Tuesday 3:30 4:30pm,
Geddes Hall Lower Level Auditorium
Slide 3
(Stein, G., IEEE Control Systems Magazine, 2003)
Slide 4
Natural Systems: Lotka-Volterra Predator-Prey Model
Time-DomainPhase-Portrait (full nonlinear dynamics)
Slide 5
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.
Slide 6
Engineered Systems: Watt Governor (Sotomayor, et al.,
2006)
Slide 7
Air Temperature Control (B. Li, et al., IFAC Cont. Eng. Prac.,
2010) Air Conditioning Control Turn compressor on Turn compressor
off
Slide 8
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/)
Slide 9
Engineered Systems: NASA X-29 forward-swept-wing aircraft
https://www.youtube.com/watch?v=4TDS_jV1DEg