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公开(公告)号：US11009316B2
公开(公告)日：2021-05-18
申请号：US16178706
申请日：2018-11-02
摘要： A method and system for nonlinear trajectory shaping guidance law capable of providing a robust guidance solution suitable for multi-mission, multi-mode operations. The nonlinear trajectory shaping guidance law offers (1) a dual layered GL gains calculation: (i) NTS time varying adjustment accounting for engine on/off and L/D variation and (ii) general explicit guidance algorithm based sub-optimal fixed-gain selection while still maintaining its trajectory shaping capability for short range to go missions; (2) flight path angle (FPA) command tracking and following to ensure a high probability of target destruction while minimizing collateral damages; (3) high precision impact point calculation factoring in target location errors or motion and maneuvering uncertainties; and (4) heading error angle minimization.
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公开(公告)号：US11385024B1
公开(公告)日：2022-07-12
申请号：US16587799
申请日：2019-09-30
IPC分类号： F41G7/22
摘要： The system and method of projectile flight management using a combination of radio frequency orthogonal interferometry for the long range navigation and guidance of one or more projectiles and a short range navigation and guidance system to provide for more accurate targeting.
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公开(公告)号：US11199379B1
公开(公告)日：2021-12-14
申请号：US16588941
申请日：2019-09-30
发明人： Quang M. Lam , Michael J. Choiniere , George M. Horihan , David A. Richards , Jason T. Stockwell
IPC分类号： F41G7/22
摘要： The system and method for EO/IR and RF sensor fusion and tracking using a dual extended Kalman filter (EKF) system provides a dynamic mixing scheme leveraging the strength of each individual sensor to adaptively combine both sensors' measurements and dynamically mix them based on the actual relative geometries between the sensors and objects of interest. In some cases the objects are adversarial targets and other times they are assets.
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公开(公告)号：US11280617B2
公开(公告)日：2022-03-22
申请号：US16550407
申请日：2019-08-26
发明人： Quang M. Lam
IPC分类号： G01C21/16
摘要： The dual mode INS high performance system using an IMM mixing method presented in this disclosure utilizes a MEMS-based IMU as the inertial sensor due, in part, to low cost and low power consumption. A dual filtering system, one with fifteen state EKF and the other with twenty one state EKF is mixed in real-time to address dynamic overlapping and continuous transition from a low dynamic mode to a high dynamic mode. The IMM estimation scheme is employed to compute the real-time mixing coefficients via the IMM probability mixing formulation. The present disclosure is applicable to earth to orbit platforms, spinning projectiles, and the like to successfully reconstruct the object's state estimate vector even under a high angular rate and high g operating environment.
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公开(公告)号：US11221194B2
公开(公告)日：2022-01-11
申请号：US16163793
申请日：2018-10-18
发明人： Quang M. Lam , Michael J. Choiniere , George M. Horihan , David A. Richards , Jason T. Stockwell
摘要： An integrated architecture and its associated sensors and processing software subsystems are defined and developed allowing a conventional unguided bullet to be transformed into a guided bullet without the use of an on-board inertial measurement unit (IMU). Some important SW components of the present disclosure include a target state estimator (TSE); a bullet state estimator (BSE); Multi-Object Tracking and Data Association; NTS GL; and a Data Link. Pre-conversion of two angles and range information of an OI sensor from spherical coordinates into Cartesian coordinates eliminates the Jacobian dependency in the H matrix for the BSE, thus increasing the miss distance performance accuracy of the bullet target engagement system.
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公开(公告)号：US11859949B1
公开(公告)日：2024-01-02
申请号：US16587564
申请日：2019-09-30
摘要： The system and method of projectile flight management using a combination of radio frequency orthogonal interferometry for the long range navigation and guidance of one or more projectiles that does not need to be accurate all the way to the ground based on the use of larger artillery. The system provides for more accurate targeting, especially in GPS-denied and GPS-limited environments.
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公开(公告)号：US11175395B2
公开(公告)日：2021-11-16
申请号：US16163721
申请日：2018-10-18
发明人： Quang M. Lam
摘要： An angle only (AO) target state estimation (TSE) system and method using a mixed coordinate system (Modified Spherical Coordinate (MSC) and Reference Cartesian Coordinate (RCC)) as an integrated system. This integrated system is achieved due to the state vector information of two frames (RCC and MSC) is effectively preserved between processing cycles and state vector transformation steps. The AO TSE architecture and processing schemes are applicable to a wide class of passive sensors. The mixed coordinate system provides robust real-time slant range estimation in a bootstrap fashion, thus turning passive AO measurements into equivalent active sensor measurements with built-in recursive range information but with greatly improved the TSE accuracy meeting the miss distance required by many engagement missions.
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公开(公告)号：US10962331B2
公开(公告)日：2021-03-30
申请号：US16433090
申请日：2019-06-06
发明人： Quang M. Lam , Ned B. Thammakhoune
摘要： The system and method of dynamic weapon to target assignment (DWTA) using a control based methodology to dynamically assign each projectile to a target in a multiple target engagement situation. In some cases, closest proximity is used in a real-time, to accomplish the DWTA functional requirement and performance criteria. In some cases, g pulling acceleration and projectile fin deflection motion are also used to assess the best matched pair for each projectile and each target with an end goal of intercepting the target or guiding the projectile to an acceptable error basket for target destruction via detonation. For the closest distance criterion for projectile/target pairing, a cutoff time is used to ensure the pairing is conducted within an acceptable duration while still being able to intercept the target or meet a required miss distance basket (e.g.,
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公开(公告)号：US11740055B1
公开(公告)日：2023-08-29
申请号：US16587516
申请日：2019-09-30
CPC分类号： F41G7/28 , F41G7/226 , F41G7/2293
摘要： The system and method of projectile flight management using a combination of radio frequency orthogonal interferometry for the long range navigation and guidance of one or more projectiles and a short range navigation and guidance system to provide for more accurate targeting, especially in GPS-denied and GPS-limited environments.
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公开(公告)号：US11199380B1
公开(公告)日：2021-12-14
申请号：US16587445
申请日：2019-09-30
摘要： The system and method of projectile flight management using a combination of radio frequency orthogonal interferometry for the long range navigation and guidance of one or more projectiles and a short range navigation and guidance system to provide for more accurate targeting, especially in GPS-denied and GPS-limited environments.
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