Automatic Control SystemsStresses the theory & application of control systems with a focus on conventional analysis & design methods, state variable methods, & digital control systems. |
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analysis applied approaches approximately assumed becomes block diagram Bode plot characteristic equation closed-loop system coefficients compensation condition consider constant construction control system corresponds criterion curve damping defined derivative described desired determined difference differential equation direction effect elements equal Example feedback control system Figure Find frequency friction G(jw gain given gives illustrates increases input integral Laplace transform linear system locus loop magnitude matrix means method obtained open-loop transfer function operation origin output overshoot parameters path phase phase margin phase-lag phase-lead polar plot poles positive practice problem rad/sec ratio reference relation relative represented respect response result root loci s-plane shown in Fig shows sides signal flow graph simple Sketch solution stability steady-state error step response Taking Theorem torque transfer function transition unit step variables vector voltage written zero