Testing of hypersonic flight is performed in wind tunnels where maintaining a constant air pressure is important.

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Testing of hypersonic flight is performed in wind tunnels where maintaining a constant air pressure is important. Air pressure control is accomplished in several stages. For a specific setup, a simplified transfer function has been found to be (Varghese, 2009)

where M(s) is the stem movement of a valve feeding compressed air into the storage tank, and P(s) is the settling chamber pressure. In order to achieve steady-state error, design a PI controller that operates with a damping factor of 0.4. Compare the characteristics of the uncompensated and compensated systems, and use a computer program to simulate the step response to the compensated system.

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