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What is the reason for choosing height error gain in such a way that the frequency of height loop is below the bandwidth of the pitch attitude loop?(a) Efficient flight(b) Better Range(c) Stable and damped response(d) Better climb rateI had been asked this question in a national level competition.My doubt is from Autopilots, Height Control and Heading Control in division Autopilots and Flight Management Systems of Avionics

Answer»

Correct choice is (c) Stable and damped response

For explanation I WOULD say: The height error GAIN is chosen so that the frequencymax is well below the BANDWIDTH of pitch attitude loop to ensure a stable and well damped height loop response. If the frequency is high, it might lead to oscillations in the vertical AXIS.



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