Three-Loop Autopilot Frequency Characteristic Measurement

Abstract:

In order to measurement frequency characteristic of the missile three loop autopilot, three loop autopilot system model of the missile pitch channel was established. Then the autopilot system open-loop model was analyzed , and also open-loop frequency calculation formula was deduced. On the basis of the autopilot system model, half physical frequency characteristic measurement system was built, and the experimental data were processed by using correlation analysis method. Experimental results shows that when the time delay of measurement system was compensated, three loops autopilot actual cut-off frequency was 47.5rad/s, phase margin was 93°, amplitude margin was infinte, compared with the theoretical value, errors was less than 5%. The correctness of three loops autopilot frequency characteristic measurement method was verified.

• Periodical: Applied Mechanics and Materials (Volumes 494-495)
• Pages: 1332-1334
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.494-495.1332
• Online since: February 2014
• Authors: Hai Rong Chu*, Bo Liu, Yue Zhang
• Keywords: Frequency Characteristic, Open-Loop, Three-Loop Autopilot

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