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Defense Information, Communication, and Space Technology
Published in Anna M. Doro-on, Handbook of Systems Engineering and Risk Management in Control Systems, Communication, Space Technology, Missile, Security and Defense Operations, 2023
The purpose of the beam control of a directed energy laser weapon system is to obtain the target and focus the laser energy accurately at the specific point on the target for a dwell time causing lethal damage to the target. A beam directing system with a precise pointing of a few micro-radians is a critical requirement of a directed energy weapon to successfully complete rapid moving and maneuvering aerial targets such as ICBMs, artillery shells, etc. The key requirement is to objectively keep the laser beam on the vulnerable point/spot on the target until destruction is accomplished. The beam control system includes the following key components; beam vehicle/transport system, beam directing telescope, target acquisition, discrimination, defense, tracking, calculation technique of a target’s geometric location, modularity, and adaptive optical capability (see right side of illustrations in Figures 5.16, 5.17, and 5.18). The beam directing telescope aids the laser beam precisely toward the target. A bore-sighted laser range detector in closed-loop engagement maintains the laser beam pointed on the target in the entire operation. The telescope aperture size manages the laser spot size as well as the lethal range of the weapon system. Accordingly, the target acquisition and tracking system consists of a target acquisition computer/camera system which is either bore sighted or shared with the telescope system. The camera determines and identifies the target and tracks it by guiding the motion of the gimbal platform. Additionally, the adaptive optical system is an added capability that senses the atmospheric aberrations and provides correction in real time.
The effects of whole-body vibration and head supported mass on performance and muscular demand
Published in Ergonomics, 2023
Aaron J. Derouin, Andrew J. Law, Heather Wright Beatty, Viresh Wickramasinghe, Steven L. Fischer
Data were recorded in LabVIEW (2018, National Instruments, Austin, TX) on a PC (Law et al. 2017) for the following data signal types: (1) 3D visual target acquisition system (3D-VTAS) (Derouin and Fischer 2019); (2) EMG using the BioSemi ActiveTwo system (Biosemi B.V., Amsterdam Netherlands); and (3) Six-degree-of-freedom kinematic data of head position and orientation using the laserBIRDTM motion tracking system (Ascension Technology Corporation, Shelburne, VT), which was mounted on top of the Gentex helmet (HGU-P/56, Zeeland, MI). 3D-VTAS and EMG data were recorded at 2048 Hz, while laserBIRD data were recorded at 240 Hz.