Avariable speed reciprocating compressor of mass 400 kg has a natural frequency of 16.2 hz. (a) design an optimum auxiliary mass damper, so that the maximum dynamic magnification for the compressor is limited to 4.0. determine the optimum damping required. (b) what is the dynamic magnification of the compressor if the absorber is optimally damped, but tuned ot the natural frequency of the system? assume same mass ratio as in part (a).

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

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg. k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m. k

Determine the damped natural frequencies and the steady state response of a decoupled damped forced two degrees of freedom system. 10ä1 + 2q1 20q1 10 cos t; 10q2 +4q2 + 40q2 10 cos t