Precision Analysis of the Semi-Strapdown Homing Guided System
Publication: Journal of Aerospace Engineering
Volume 27, Issue 1
Abstract
Precision and stability region analysis of the realistic semi-strapdown homing guided (SSHG) system is made. The mathematic model of the parasitic loop of the SSHG system is established. The stability region of friction coefficient, counter electromotive force (EMF) coefficient, and sensor dynamic mismatch of the realistic SSHG system are given via Routh criterion by analyzing the stability of the parasitic loop. The stability degree of the semi-strapdown homing seeker (SSHS) parasitic loop can be improved mainly by changing the performance index of the seeker tracking control system. Via the simplified model of the SSHG system, the explicit analytic expressions of miss distance and command acceleration induced by target maneuvering and measurement errors are presented. With the adjoint technique, the influence patterns of the main system parameters and sensor measurement errors on the attack precision of the realistic complex SSHG system are analyzed. Numerical simulations indicate that when the parasitic loop is stable, the performance index of the seeker angular loop influences both the RMS miss distance and RMS command acceleration significantly; the performance index of the seeker inner loop has a great effect on RMS command acceleration and little influence on RMS miss distance, which provide the foundation for the realization of SSHS.
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Information
Published In
Journal of Aerospace Engineering
Volume 27 • Issue 1 • January 2014
Pages: 151 - 167
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Oct 19, 2011
Accepted: Mar 2, 2012
Published online: Mar 8, 2012
Published in print: Jan 1, 2014
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