MECH 466 - Lecture23-HistoryofControlandSummary-2009W

Evans 1920 1999 1920american engineer north american

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Unformatted text preview: ans (1920-1999) (1920American engineer North American Aviation Root locus (1948) Root (1948) Unstable plants in aerospace Unstable control problems Difficult to apply frequency Difficult response techniques Back to characteristic equation Back and closed-loop poles closed- Nathaniel Nichols (1914-1997) (1914Mathematician Taylor Instruments, MIT Ziegler-Nichols tuning rule (1942) Ziegler(1942) Nichols chart (1947) (1947) MECH466 : Automatic Control 10 History of Automatic Control John Ziegler (1909-1997) (1909American process control engineer Taylor Instruments Ziegler-Nichols tuning rule (1942) Ziegler(1942) 2008/09 MECH466 : Automatic Control 11 2008/09 MECH466 : Automatic Control 12 3 Categories of Automatic Control Weak points of classical control Single-input single-output (SISO) Singlesingle(Multivariable (MIMO) control theory) Linear time-invariant Linear time(State-space, nonlinear control theory) (StateNo optimality in design No (Optimal control theory) No robustness, except GM and PM No (Robust control theory) Classical control (contents in this course) Classical Transfer function Transfer Frequency domain Frequency Modern control (1960-) Modern (1960State-space model StateTime domain Time Optimality Optimality Post-modern control (1980-) Post(1980Robust control Robust Hybrid control, etc. Hybrid 2008/09 Muc...
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