6 research outputs found
Development of reinforcement learning based mission planning method for active off-board decoys on naval platforms
In this paper, a reinforcement learning-based decoy deployment strategy is proposed to protect naval platforms against radar seeker-equipped anti-ship missiles. The decoy system consists of a rotary-wing unmanned aerial vehicle (UAV) and an integrated onboard jammer. This decoy concept enables agility which is quite critical for jamming operations against a high-speed anti-ship missile. There are two main purposes of the developed jamming strategy; a) flying in the field of view of the anti-ship missile to conceal the naval platform, and b) flying away from the target ship to increase the miss distance between the anti-ship missile and naval platform. Here, it is aimed to meet these requirements simultaneously. Kinematics models are used to represent missile, decoy UAV, and target motion. Jammer and seeker signal strengths are modeled and the radar-cross section of a frigate is utilized to increase the realism of the simulation environment. Deep Deterministic Policy Gradient (DDPG) algorithm is applied to train an actor-critic agent which maps the observation parameters to decoy’s lateral acceleration. A heuristic way is chosen to create an appropriate reward function to solve the decoy guidance problem. Finally, simulations studies are performed to evaluate the system performance
Department of Defense Dictionary of Military and Associated Terms
The Joint Publication 1-02, Department of Defense Dictionary of Military and Associated Terms sets forth standard US military and associated terminology to encompass the joint activity of the Armed Forces of the United States. These military and associated terms, together with their definitions, constitute approved Department of Defense (DOD) terminology for general use by all DOD components
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Anti-Satellite Weapons, Countermeasures, and Arms Control
An assessment by the Office of Technology Assessment (OTA) of the "opportunities and risks involved in an accelerated program of research on new ballistic missile defense technologies, including those that might lead to deployment of weapons in space" (p. iii)
Transitioning Advanced Concept Technology Demonstrations to acquisition programs
This thesis evaluated the Department of Defense's Advanced Concept Technology Demonstration (ACTD) process and the challenges encountered in transitioning an ACTD to an acquisition program. The methodology included case analyses of two ACTD programs that transitioned to acquisition programs to determine their levels of success. The scope included a review of: 1) ACTD origins and processes as of July 2002, 2) past ACTD programs, 3) the established documentation criteria associated with ACTD selection and evaluation, 4) the two ACTD case programs selected for analysis, 5) the apparent ACTD transition areas prone to success or failure, and 6) potential process improvements that would aid in ACTD transition to acquisition programs. This thesis identified both the strengths and the weaknesses in the existing ACTD transition process. The results indicated that several of the existing ACTD criteria should be maintained. However, it was also determined that several enhancements could be incorporated into future processes. It concluded with recommended improvements that would enhance the insertion of technology to the warfighter via the acquisition process. With the combination of current practices and implementation of these recommendations, ACTDs could become the cornerstone of the Secretary of Defense's new acquisition process.http://archive.org/details/transitioningadv109456142GM-15, Department of the NavyApproved for public release; distribution is unlimited