me351_hw1_soln - ME 351 Modeling and Control of Dynamic...

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1 ME 351 Modeling and Control of Dynamic Systems Homework #1 – Solutions [10 pts, 2 each] [1]. (a) Temperature: Thermistor- temperature sensitive resistor with resistance change proportional to temperature; Thermocouple; Thyrister. (b) Pressure: Strain sensitive resistor mounted on a diaphragm which bends due to changing pressure (c) Liquid level: Float connected to potentiometer. If liquid is conductive the impedance change of a rod immersed in the liquid may indicate the liquid level. (d) Flow of liquid along a pipe: A turbine actuated by the flow with a magnet to trigger an external counting circuit. Hall effect produces an electronic output in response to magnetic .eld changes. Another way: Measure pressure difference from venturi into pressure sensor as in figure; Flowmeter. (e) and (f) Position. When direct mechanical interaction is possible and for small displacements, same ideas may be used. For example a potentiometer may be used to measure position of a mass in an accelerator (h). However in many cases such as the position of an aircraft, the task is much more
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This note was uploaded on 02/22/2010 for the course MECHANICAL ME 351 taught by Professor Korayk.şafak during the Spring '09 term at Yeditepe Üniversitesi.

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me351_hw1_soln - ME 351 Modeling and Control of Dynamic...

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