Fast response projectile roll estimator
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0561004
(2009-09-16)
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등록번호 |
US8047070
(2011-10-17)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
2 인용 특허 :
3 |
초록
▼
An apparatus and method for estimating a roll angle of a projectile may include a measurement unit outputting roll rate, yaw rate, and pitch rate signals indicative of rotation rates about substantially orthogonal roll, yaw, and pitch axes, the roll axis substantially aligned with a longitudinal axi
An apparatus and method for estimating a roll angle of a projectile may include a measurement unit outputting roll rate, yaw rate, and pitch rate signals indicative of rotation rates about substantially orthogonal roll, yaw, and pitch axes, the roll axis substantially aligned with a longitudinal axis of the projectile. A controller may sample the roll rate, yaw rate, and pitch rate signals to obtain time sequential roll rate, yaw rate, and pitch rate samples; calculate time sequential cumulative roll estimates by summing the roll rate samples; calculate time sequential gravity vector estimates from the corresponding yaw rate and pitch rate samples; de-roll each gravity vector estimate based on the corresponding cumulative roll estimate; filter the de-rolled gravity vector estimates to determine a filtered initial roll estimate; and add the filtered initial roll estimate to the current cumulative roll estimate to provide a current roll angle estimate.
대표청구항
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It is claimed: 1. An apparatus for estimating a roll angle of a projectile, comprising:a measurement unit disposed within the projectile, the measurement unit outputting roll rate, yaw rate, and pitch rate signals indicative of rotation rates about substantially orthogonal roll, yaw, and pitch axes,
It is claimed: 1. An apparatus for estimating a roll angle of a projectile, comprising:a measurement unit disposed within the projectile, the measurement unit outputting roll rate, yaw rate, and pitch rate signals indicative of rotation rates about substantially orthogonal roll, yaw, and pitch axes, the roll axis substantially aligned with a longitudinal axis of the projectile; anda controller disposed within the projectile, the controller for estimating the roll angle by:sampling the roll rate, yaw rate, and pitch rate signals to obtain time sequential roll rate, yaw rate, and pitch rate samples,calculating time sequential cumulative roll estimates by summing the roll rate samples,calculating time sequential gravity vector estimates from the corresponding yaw rate and pitch rate samples,de-rolling each gravity vector estimate based on the corresponding cumulative roll estimate,filtering the de-rolled gravity vector estimates to determine a filtered initial roll estimate, andadding the filtered initial roll estimate to a current cumulative roll estimate to provide a current roll angle estimate.
이 특허에 인용된 특허 (3)
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Lindquist,Erik; Kreichauf,Ruth D., Apparatus and appertaining method for upfinding in spinning projectiles using a phase-lock-loop or correlator mechanism.
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Gustafson Donald E. ; Lucia David J., Autonomous local vertical determination apparatus and methods for a ballistic body.
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Minor Roy R. ; Rowe David W., Utilization of a magnetic sensor to compensate a MEMS-IMU/GPS and de-spin strapdown on rolling missiles.
이 특허를 인용한 특허 (2)
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Sheard, John Keith; Faulkner, Nicholas Mark, Inertial navigation system.
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Shaltiel, Rabin; Kahane, Allan, System and method for measurement of angular orientation of aerospace platforms.
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