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Control Systems (All) Cheat Sheet by [deleted]

Control Systems
control     systems

Control Systems

Transient and steady state response of control systems; Effect of feedback on stability and sensit­­ivity; Root locus techni­­ques; Frequency response analysis. Concepts of gain and phase margins: Constant-M and Constant-N Nichol’s Chart; Approx­­im­ation of transient response from Constant-N Nichol’s Chart; Approx­­im­ation of transient response from closed loop frequency response; Design of Control Systems, Compen­­sa­tors; Industrial contro­­llers.

Basic control system compon­­ents; block diagra­­mmatic descri­­ption, reduction of block diagrams. Open loop and closed loop (feedback) systems and stability analysis of these systems. Signal flow graphs and their use in determ­­ining transfer functions of systems; transient and steady state analysis of LTI control systems and frequency response. Tools and techniques for LTI control system analysis: root loci, Routh-­­Hu­rwitz criterion, Bode and Nyquist plots. Control system compen­­sa­tors: elements of lead and lag compen­­sa­tion, elements of Propor­­ti­o­n­al­­-In­­te­g­r­al­­-De­­ri­v­ative (PID) control. State variable repres­­en­t­ation and solution of state equation of LTI control systems.

Civil Services (EE)
Elements of control systems; block-­­di­agram repres­­en­t­a­tion; open-loop & closed­­-loop systems; principles and applic­­ations of feed-back. Control system compon­­ents. LTI systems: time-d­­omain and transf­­or­m­-­domain analysis. Stability: Routh Hurwitz criterion, root-loci, Bode-plots and polar plots, Nyquist’s criterion; Design of lead-lad compen­­sa­tors. Propor­­ti­onal, PI, PID contro­­llers. State-­­va­r­iable repres­­en­t­ation and analysis of control systems.

Gate EE
Principles of feedback; transfer function; block diagrams; steady­­-state errors; Routh and Niquist techni­­ques; Bode plots; root loci; lag, lead and lead-lag compen­­sa­tion; state space model; state transition matrix, contro­­ll­a­b­ility and observ­­ab­i­lity.

Mathem­­atical modeling of physical systems. Block diagrams and signal flow graphs and their reduction. Time domain and frequency domain analysis of linear dynamical system. Errors for different type of inputs and stability criteria for feedback systems. Stability analysis using Routh-­­Hu­rwitz array, Nyquist plot and Bode plot. Root locus and Nicols chart and the estimation of gain and phase margin. Basic concepts of compen­­sator design. State variable matrix and its use in system modelling and design. Sampled data system and perfor­­mance of such a system with the samples in the error channel. Stability of Sampled data system. Elements of non-linear control analysis. Control system compon­­ents, electr­­om­e­c­ha­­nical, hydraulic, pneumatic compon­­ents.

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