(a). Name three applications for feedback control systems.
(b).Name three reasons for using feedback control systems and at least one reason for not using
(c). Functionally, how do closed-loop systems differ from open-loop systems?
(d).State one condition under which the error signal of a feedback control system would not be the
difference between the input and the output.
(e).If the error signal is not the difference between input and output, by what general name can we
describe the error signal?
(f). Name the two parts of a system’s response.
(g).Explain the terms
iii. Block diagram
(h).What assumption is made concerning initial conditions when dealing with transfer functions?
Page 3 of 3 27-Aug-19
3. The quarter-car model of a vehicle suspension is shown in the figure below. The model includes
one-fourth mass of the vehicle body
, the mass of the wheel-tire-axle assembly
. The spring
and damping coefficient
represents the suspension, and
represents the tire’s
elasticity. The input u is a displacement input
a) Derive the equations of motion for
in terms of the displacements from
equilibrium, x and y.
b) Obtain the transfer function
of the system
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