Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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For a certain mass-spring system m = 100 kg and k = 8000 N/m. Determine the value of the critical damping constant C_c and the damped natural frequency W_d and the logarithmic decrement d if C = C_c/3
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- The quarter-car model of a vehicle suspension and its free body diagram are shown in Figure 1. In this simplified model, the masses of the wheel, tire, and axle are neglected, and the mass m represents one-fourth of the vehicle mass. The spring constant k models the elasticity of both the tire and the suspension spring. The damping constant c models the shock absorber. The equilibrium position of m when y=0 is x=0. The road surface displacement y(t) can be derived from the road surface profile and the car’s speed. Draw free body diagram (FBD) and derive the equation of motion of m with y(t) as the input, and obtain the transfer function. If assume: m=300 kg k=20000, 40000, 60000 N/m c=1000, 3000, 5000 N.s/m Plot magnification ratio vs frequency ratio (r=0-4) diagrams for the parameters given above (you can draw the three curves in one diagram for three different k values and do the same for the three c values as well). Use the derived transfer function to model the system and plot…arrow_forwardConsider the following system. Assumem = 4kg,k = 2000 N/m and c = 20N.s/m. The damping ratio of the first mode is: m Xj k m X2arrow_forwardDetermine the damping factor and natural frequency for the second-order system below and determine the type of response. ωn= ζ = system type =arrow_forward
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