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- Suppose we apply proportional feedback control to the system. For what range of Kp is the system stable?Consider the feedback control system; It is required that the system has 16% overshoot to a unit step input and ess = 0.2 steady state error to a unit ramp input. Calculate the values of K1 and Kf such that these specifications are met.Explain the difference between feedforward concurrent and feedback control
- A unit feedback system has (see picture below) If subjected to unit step input, determine: a) Damped frequency of oscillations, b) time for first overshoot, c) settling time, d) maximum peak overshoot, e) stabilityIn a generalised control system with feedback the value of the forward gain is 831, and the gain of the feedback path is 0.0021. What is the overall (i.e. closed-loop) system gain? Enter the result calculated to 1 decimal point.Discuss merits and demerits of feedback in control system . Give 5 points for each brief only
- Hybrid vehicle. FIGURE P1 shows the block diagram of a possible cascade control scheme for an HEV driven by a dc motor (Preitl, 2007). The block diagram of the speed control of an HEV taken from FIGURE P1, and rearranged as a unity feedback system is shown in FIGURE P2. Here the system output is C(s) = Kss V(s), the output voltage of the speed sensor/transducer. pC, Av,- Speed K, Gre(s) controller command Torque Amplifier controller output & power voltage amplifier Acro- Motive dynamie Armature Speed |drag torque Angular speed, Ref. circuit Armature torque Vehicle signal R,(s). error U(s) T(s)T,(s) current E,(s) speed, V(s) Gse(s) K, Grc(s) R. tot Friction Feedback speed signal Kss2(s) Feedback torque current signal Kes I(S) T,(s) E,(s) Back emf D=k ks Current sensor sensitivity Kcs Speed sensor sensitivity Kss FIGURE P1 Hybrid Vehicle R (s), E (s) Uc(s) |C(s) + Gsc(s) 0.11 (s + 0.6) SC s (s + 0.5173) + 5 (s + 0.6) (s + 0.01908) URE P2 Block diagram of the speed control of an HEV a.…Q4) For the Schmitt trigger circuit of the following figure ,R1=50 KQ „R2 = 1002, Vref =0v, Vinp-p=1vsine wave, and Vcc=14,Vcc=-14. 1) Determine threshold voltages VUTH, VLTH, frequency. 2) Draw and explain the operation of an inverting Schmitt trigger 3) What is hysteresis? 4) Draw the input and output waveforms of an inverting Schmitt trigger circuit for a sinusoidal input Vin Vcc 6-VEC R,Give examples for one open-loop system and one closed-loop system. Describe the system’s input, output and feedback if it is a closed-loop system.
- control system Consider the total harmonic distortion of a closed loop system is 5%. Distortion without feedback is 10%. Calculate the sensitivity of the closed loop system.For the Positive feedback control system prove that:State whether the following statement is true or false. “Voltage regulation in an LDO is achieved by means of a negative feedback loop.”