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10 points Steady state analysis using the closed loop transfer function is not preferred because: n it tends to overestimate the error it tends to underestimate the error in general it is not known and needs to be computed o the open loop transfer function gives a more reliable estimate of the error

Answer 1

* Open Loop Cor) non feedback Cov) Manual control System: Input output controller - system) These are systems in which the control action is in of the output → No Sensor to sense and the output is sensed and controlled manually Ex: Bread toaster, traffic control system. → Accuracy is less and depends on calibration. → Low cost and simple to design. → Not generally troubled with the problems of instability,

* closed LOOP (Fead back ) (Automatic Control Systems: → control action depends on the output. Ex: Temperature control System, Speed control system (of motor) (Reference i/p) - Controller System output Input freed back → Accuracy is more → Distortions are less output is less sensitive to change in system parameters Band width (BW) is more (BWA Risc time (ty) & speed 1) → Tendency towards osallations if feedback is not properly taken care of.

Effect of feedback on Gain: (Negative feedback) EL: OLTFSS Gain = little Joti to ..CLIP: Štz Gain = jwtzl on @ . Value of can @ < value of egno . Gain decreases * Effect of feedback on stability → Improper feedback destabilizes the system, otherwise closed loop systems are more stable than the corresponding open loop System.

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