Abstract

According to the special response of resistance acceleration during hypersonic reentry flight, different guidance frequency will result to very different flight and control response. The analysis model for the response of resistance acceleration to the attack angle and dynamic press is put forward respectively in this paper. And the frequency aliasing phenomenon of guidance is revealed. The simulation results to the same vehicle sufficiently substantiate the frequency aliasing of resistance acceleration during reentry guidance.

Highlights

  • SummaryDuring the process of large lift-drag ratio flight, Lift-body is usually controlled by given flight profile

  • According to the special response of resistance acceleration during hypersonic reentry flight, different guidance frequency will result to very different flight and control response

  • According to the dynamic characteristics of reentry flight, the drag acceleration is greatly influenced by dynamic pressure and attack angle

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Summary

Summary

During the process of large lift-drag ratio flight, Lift-body is usually controlled by given flight profile. Under this background, one of the most classical guidance schemes is space flight reentry guidance [1]. In the guidance scheme of the space shuttle, the resistance acceleration signal is used as the core to control the reentry guidance and the successful implementation of the project is carried out. After the opening of the space shuttle test data, a lot of research focused on reentry guidance, which shows that there is a certain lack in acceleration signal guidance[2]. The traditional guidance design is based on the dynamic equation of a particle. It is difficult to eliminate through the filtering process, which will cause serious pollution to the signal and affect the terminal guidance performance

Frequency aliasing
Modal analysis of resistance acceleration
Response characteristic of drag acceleration
Effect of dynamic pressure on drag acceleration
Aliasing phenomenon of drag acceleration
Conclusion
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