Pre-Lab Questions In this lab, we will design a PD controller in the frequency domain using Bode plots, so that the step response satis es the following speci cations: (1) the rising time is 0 : 07 s; (2) the phase margin 75 degree; (3) the percentage overshoot is 5%; (4) the settling time is 0 : 12 s. We will nd the proportional and derivative gains required for the QUBE-Servo 2 system using the following procedure: 1. Find the proportional gain k p , so that the rising time of the step response of the closed-loop system with a proportional controller is 0 : 07 s.

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.