Cooperative Engagement Capability Research Articles

A Novel Genetic Algorithm for the Synthetical Sensor-Weapon-Target Assignment Problem

The sensor-weapon–target assignment (S-WTA) problem is a crucial decision issue in C4ISR. The cooperative engagement capability (CEC) of sensors and weapons depends on the S-WTA schemes, which can greatly affect the operational effectiveness. In this paper, a mathematical model based on the synthetical framework of the S-WTA problem is established, combining the dependent and independent cooperative engagement modes of sensors and weapons. As this problem is a complex combinatorial optimization problem, a novel genetic algorithm is proposed to improve the solution of this formulated S-WTA model. Based on the prior knowledge of this problem, a problem-specific population initialization method and two novel repair operators are introduced. The performances of the proposed algorithm have been validated on the known benchmarks. Extensive experimental studies compared with three state-of-the-art approaches demonstrate that the proposed algorithm can generate better assignment schemes for the most of the benchmarks.

A Methodology for Analyzing Effects of the Cooperative Engagement Capability System Applied to Naval Operations

A Methodology for Analyzing Effects of the Cooperative Engagement Capability System Applied to Naval Operations

협동교전능력을 위한 자료융합 구조와 비선형 통계적 트랙 융합 기법

협동교전능력과 네트워크 중심의 교전에 대한 관심과 더불어 분산형 추적 시스템에 대한 연구는 중요하다. 이러한 분산형 추적 시스템 연구에 있어서 네트워크의 거대화에 의해 비선형 시스템에서의 추적 필터와 자료융합기술 개발이 불가피하다. 따라서 본 논문에서는 협동교전능력 응용을 위해 측지좌표계 기반의 분산형 추적 시스템에 적합한 트랙 융합구조에서 비선형 시스템 환경 하에 운용할 수 있는 비선형 자료융합 기법의 문제를 정립하고 그에 적용 가능한 기법들을 소개하고 성능을 비교 분석한다. 비선형 시스템에서는 최적의 트랙 융합 기법을 구현하는데 있어서 상호 공분산을 구할 수 없다는 것이 가장 큰 문제점이다. 이와 같은 문제점을 해결하기 위해서 크게 간소화 기법과 근사화 기법의 두 가지 접근법이 있다. 간소화 기법에서는 sample mean과 Millman formula의 두 가지 추정치 융합 기법을 유도할 수 있고, 근사화 기법에서는 해석적 선형화 기법과 통계적 선형화 기법의 두 가지 추정치 융합 기법을 유도할 수 있다. 소개된 네 가지 융합 기법을 모의 실험한 결과 각 플랫폼의 추정치 공분산 정보만을 이용하여 필터의 매 단계에서 최적의 플랫폼을 선택할 수 있는 Millman formula 추정치 융합 기법과 적은 복잡도로 보다 정확히 플랫폼들의 상관 공분산을 근사화 할 수 있는 BCS 융합기법이 효율적임을 확인할 수 있다. As the importance of Cooperative Engagement Capability and network-centric warfare has been dramatically increasing, it is necessary to develop distributed tracking systems. Under the development of distributed tracking systems, it requires tracking filters and data fusion theory for nonlinear systems. Therefore, in this paper, the problem of nonlinear track fusion, which is suitable for distributed networks, is formulated, four algorithms to solve the problem of nonlinear track fusion are introduced, and performance of introduced algorithms are analyzed. It is a main problem of nonlinear track fusion that cross-covarinaces among multiple platforms are unknown. Thus, in order to solve the problem, two techniques are introduced; a simplification technique and a approximation technique. The simplification technique that help to ignore cross-covariances includes two algorithms, i.e. the sample mean algorithm and the Millman formula algorithm, and the approximation technique to obtain approximated cross-covariances utilizes two approaches, by using analytical linearization and statistical linearization based on the sigma point approach. In simulations, BCS fusion is the most efficient scheme because it reduces RMSE by approximating cross-covariances with low complexity.

An Arsenal Ship Design Affordable, Advanced Warfighting Capabilities

ABSTRACT The Navy's “Arsenal Ship Concept of Operations [1]” and “Ship Capabilities Document (SCD) [2]” address a need for the design of a large missile platform that can carry massive and precise firepower, accomplish long‐range strike, and perform flexible targeting and multidimensional theater defense consistent with the policies of “Forward… From the Sea [3]” and “Operational Maneuver from the Sea [4].” The ship is designed to be a large missile magazine that receives its launch orders from remote air, land or sea forces. It is fully integrated into the joint command and control structure to assist current forces in the opening days of conflict. A major design goal of the Arsenal Ship is to limit the crew size to 50 personnel through the use of system automation, redundancy and equipment reliability, while meeting an additional constraint of limiting the sailaway price to 550 million dollars.The Total Ship Systems Engineering (TSSE) design team at the Naval Postgraduate School (NPS) in Monterey, CA used a modified repeat of the T‐AO 201 class oiler. The selection of this hull is based on mass tonnage for survivability, carrying capacity for approximately 500 vertically launched missiles and budget constraints that militate against a new hull design. The midship section of the ship is fitted with 64 eight‐cell Concentric Canisterized Launcher (CCL) modules. The Cooperative Engagement Capability (CEC) is incorporated in the design to provide the controlling platform the ability to remotely fire the Arsenal Ship's missiles.The design was performed at NPS under the direction of author Calvano by a group of fifteen officer students, which included authors Chase, Baumann and Null. It is believed that the at‐sea experience and thorough analysis from the officers involved has resulted in a sensible design of a creative and highly realistic solution to the Navy's call for an Arsenal Ship of the 21st Century.

Cooperative Engagement Capability

ABSTRACT A revolutionary approach to air defense has recently been extensively evaluated within the United States Navy The approach is a new cooperative engagement capability (CEC) that allows systems to share unaltered sensor measurement data with very small time delay and with retention of precision, enabling the units of a battle group to operate as one. The CEC system and the program for fleet introduction will be described. Further, the results of recent testing as well as new concepts toward multiwarfare, joint‐services operations are discussed.

LPD 17: In the Midst of Reform

ABSTRACT The LPD 17 Amphibious Transport Dock Class will be the functional replacement for the LPD 4, LST 1179. LSD 36 and LKA 113 Classes of amphibious ships scheduled to be decommissioned prior to 2010. The program is nearing completion of Contract Design with the lead ship scheduled for commissioning early next century. Like its predecessors, the LPD 17 design is focused on meeting the amphibious mission lift requirements, and does so capably: 2300 m2vehicle lift, 710 m3cargo capacity, 720 troops, 2 LCAC and 2 CH‐53 (or 4 CH‐46) spots. In contrast to the ships it replaces, LPD 17 Class ships will have superior passive survivability (e.g., reduced radar cross section, structural hardening, collective protection system, smoke ejection system) and unprecedented AAW self‐defense combat systems: 64 Evolved Sea Sparrow Missiles (ESSM) “quadpacked” in a 16‐cell MK 41 Vertical Launch System (VLS) controlled by the Ship Self‐Defense System (SSDS) and Advanced Combat Direction System (ACDS) using AN/SPS‐48E, AN/SPQ‐9B and Cooperative Engagement Capability (CEC). LPD 17 also employs the first full ship fiber optic cable plant for the backbone of its Integrated Interior Command and Control (IC)2‐ system.In addition to its many technical “firsts,” LPD 17 is the first Acquisition Category (ACAT) ID naval warship acquired under the revised Department of Defense (DoD) 5000 series acquisition requirements. More recently, the LPD 17 program became the first lead ship new construction program to implement the June 94 Secretary of Defense specifications and standards reform policy. This procurement policy change effectively prohibits reliance on the thousands of Military Specifications and Standards (MILSPECs and MILSTDs) unless specific, individual waivers are approved. Because Contract Design was approximately two‐thirds complete at the time the policy was signed, the LPD 17 Design Team developed and executed an accelerated three‐phase review effort with five shipbuilders and the American Bureau of Shipping. This effort resulted in the elimination of over 75% of the original 1500 government references.Inherent in the review process was the requirement to neither compromise military performance nor increase program cost. Accordingly, a critical core of MILSPECs and MILSTDs are presently considered as candidates for retention in the ship specification and waiver requests are being prepared. The waiver policy also calls for review and waiver of the entire ship specification. Broad impacts of this reform effort are presently being assessed as the LPD 17 Program continues toward lead ship construction approval.

Circular Overmoded Waveguide for Shipboard Use

ABSTRACTSeveral future Navy combat systems under development require efficient delivery of high power microwave energy from remote transmitters to array antennas. To achieve this requirement, a family of microwave components has been developed and tested.Progress is described in the design and testing of an overmoded circular TE01 mode waveguide applicable to special shipboard needs. Because such a waveguide had originally been developed for low power millimeter band trunkline communications between cities, new theoretical, design, and fabrication techniques had to be developed to meet our specific performance requirements. Moreover, in order to fulfill the combat system requirements, the waveguide would have to withstand harsh military requirements.Over several years the obstacles to the application of overmoded technology to Navy combat systems have been systematically eliminated. The effort has resulted in the invention of several new components, the development and validation of a new computer aided design package, and the implementation of new microwave measurement techniques. The first application of an overmoded waveguide to a combat system element was recently achieved in the successful demonstration of the prototype Cooperative Engagement Capability, and steps toward a production military version of the waveguide have been initiated.