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- W4366382414 abstract "During the firing of a gun mounted on the body of a helicopter, aircraft body and gun turret vibrations and bending disturbances result in bullet dispersion affecting gun accuracy. As a legacy helicopter was modernized, system dynamics changed thereby increasing the disturbance effects on gunfire accuracy. These system dynamic changes caused an out of specification dispersion of bullets that needed to be reevaluated and because of restrictions, a new system not procured. Thus to reduce vibrations and bending disturbances on a legacy helicopter mounted gun system, two solutions were developed and assessed: active damping and ramp rates for the bending corrections. These solutions carefully took into consideration vibrations caused by the recoil of the gun during firing and also the gun control system settling time in relation to physical deformation of the mechanical system when applying a bending correction. Both solutions deal with gun position control design and use software design modifications to reduce bullet impact dispersion with specific emphasis on the elevation axis and early rounds in a firing burst. Active damping with baseline bending corrections showed a 56% decrease of gun movement on the elevation axis during firing. Using both active damping and ramp rates for the bending corrections resulted in overall 15-50% improvements in bullet impact dispersion on the elevation axis when firing from a hover." @default.
- W4366382414 created "2023-04-21" @default.
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- W4366382414 date "2021-05-10" @default.
- W4366382414 modified "2023-09-30" @default.
- W4366382414 title "Improvements to a Helicopter Gun System Controller Using Active Damping and Ramp Rates for the Bending Corrections" @default.
- W4366382414 doi "https://doi.org/10.4050/f-0077-2021-16821" @default.
- W4366382414 hasPublicationYear "2021" @default.
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