1_MAE 334Woodward - lab 4

1_MAE 334Woodward - lab 4 - Background The apparatus shown...

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MAE 334 Lab 4 Department of Mechanical and Aerospace Engineering MAE 334 - Introduction to Instrumentation and Computers Laboratory 4 Studying the Behavior of a Compressed Gas Objectives This experiment will introduce you to two new types of transducers – a strain gage pressure transducer and a linear motion transducer used for the measurement of displacement. You will also see a rather sophisticated but homemade program for data acquisition based on the LabView graphical programming package. We will limit our explicit instructions for this experiment so that you will make several decisions on your own based on the earlier laboratory experiments. You will use your background and the new tools: 1. To study the behavior of an enclosed volume of air as it is compressed and compare its behavior to two different ideal compression models. 2. To monitor the sudden discharge of a volume of compressed gas and compare the resulting pressure transient to simple first and second order dynamic models.
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Unformatted text preview: Background The apparatus shown in Figure 1 for this compressed air experiment has been developed over several years to be compact, safe and convenient for use in the Instrumentation Lab. You should take a few minutes to look over the apparatus which is a good example of custom design. It is self-contained in a Plexiglas enclosure and contains a strain gage pressure transducer, a linear potentiometer, a hand operated air cylinder, a pressure gage, a solenoid operated valve and a manual valve. The most critical portion of the experiment is automated by a LabView program which activates the system and collects data at a high sampling rate. The apparatus is electrically powered by 110 volts AC (from a wall socket). This connects to a DC supply providing 15 volts for the strain gage amplifier as well as approximately 5 volts for the linear potentiometer. Figure 1. Apparatus for the Compression Study 1 of 8...
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This document was uploaded on 01/03/2011.

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