APSC 254 lab Dynamic Response

APSC 254 lab Dynamic Response - APSC 254 Dynamic response...

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1 APSC 254 Dynamic response of 1st order systems Objective The objective of this experiment is to comprehend the behaviour of 1 st order mechanical and electrical systems subjected to external excitations such as a step input. Theory To characterize and evaluate a 1st order system we need to conduct experiments to determine the time constant, τ , and static sensitivity, K . The static sensitivity may be obtained from static calibration where a known static input is applied, and the output is measured. A common method to determine the time constant is to apply a step input to the system and determine the time for the output to reach 63.2% of its final value (the magnitude of the step input). In this experiment the dynamic response of 1) a thermal system (i.e., a thermistor) and 2) an RC electrical circuit is analyzed to estimate the time constant of these two different systems. A thermistor is a semiconductor temperature sensor. The resistance of a thermistor decreases exponentially as temperature increases (see Eq. 6.2 in the text book).
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APSC 254 lab Dynamic Response - APSC 254 Dynamic response...

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