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A LVDT is a displacement sensor, which is commonly used in mechatronic systems. Consider a digital control loop that uses an LVDT measurement for position control of a machine. Typically, the LVDT is energized by a dc power supply. An oscillator provides an excitation signal in the kilohertz range to the primary windings of the LVDT. The secondary winding segments are connected in series opposition. An ac amplifier, demodulator, low-pass filter, amplifier, and ADC are used in the monitoring path. Figure P4.19 shows the various hardware components in the control loop. Indicate the functions of these components.
Figure P4.19
At the null position of the LVDT stroke, there was a residual voltage. A compensating resistor was used to eliminate this voltage. Indicate the connections for this compensating resistor.
air at -55 f 4 psia and m2.5 enters a constant area isentropic process and leaves the isentropic process at m0.2
Figure 4.42 shows a gasoline tank filled into the filler pipe. The gasoline has a specific gravity of 0.67. Calculate the total force on each flat end of the tank and determine the location of the center of pressure.
a piston cylinder device initially contains 0.5 kg of r134a at 200 kpa and a specfic volume of 0.07 m3kg. at this point
An ideal gas, with temperature independent Cp=(7/2)R, at 15c and having an initial volume of 60m^3, is heated at constant pressure (P=0.1013 MPa) to 30c by transfer of heat from a reservoir at 50c. Calculate delS(gas), delS(heat reservoir), delS(univ..
Write the velocity pro?le and calculate the torque and the power required to rotate the inner cylinder at 2000 rpm assuming a laminar ?ow.
oxygen at 100 kpa 27degc is compressed to 1 mpa in an adiabatic compressor whose isentropic efficiency is 0.80.
Calculate the range of frequencies at which the amplitude of the machine vibration is less with the absorber fitted than without the absorber.
the greatest fluctuation of energy to be stored by an engine flywheel is 2kj when the mean engine speed is 4 revs. the
Ways to run cars on water are frequently touted on the Internet. For each of two different such proposals, write a three-page evaluation. In each evaluation, clearly state the claims made in the proposal. Then, using principles of thermodynamics, ..
the collars are pin connected at b and are free to move along rod oa and the curved guide oc having the shape of a
2kg of air in a closed rigid tank is fitted with an electrical resistor. the resistor draws a constant current of 10
A Brayton gas turbine cycle has two stages of compression and two stages of expansion. The pressure ratio across each stage of the compressor and turbine is 3. The air enters each stage of the compressor at 300K and each stage of the turbine at 1..
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