A unity feedback system has a transfer function G(s) = K/(s+1) where K= 2 is subjected to unity step input. A PD-controller is added where Gc(s) = 500+0.5s. determine the steady state error before and after adding the controller respectively. Immersive Reader (3 Points)

0.50 and 0.002

0.33 and 0.001

0.25 and 0.0007

0.20 and 0.0005

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)

How much power could a wind turbine produce if it had the following specifications? cp = 0.45 -d=1.2kg/m3 d=50m v 5m/s

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?