Roll Resonance Control of Angle of Attack for Reentry Vehicle Drag Modulation
Abstract
Slender ballistic reentry vehicles are highly susceptible to roll rate changes caused by small asymmetries in mass and configuration. One particular combination of asymmetries, consisting of a body-fixed trim angle of attack and a small radial c.g. offset, can cause a rapid spinup into resonance, with a large amplification in trim angle of attack and a concomitant increase in drag. By controlling the magnitude and direction of the c.g. offset with a moving-mass roll control system, it is possible to control the roll rate near resonance and to limit the angle-of-attack and drag response to a controlled value. A feedback law is derived, and the control system is demonstrated with a digital-computer simulation of the equations of rotational motion. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 10, 1980
- Accession Number
- ADA093741
Entities
People
- D. H. Platus
Organizations
- The Aerospace Corporation