Radar Seeker Research Articles

반능동 레이더 미사일에 대한 최대 사거리 및 F-pole 평가

본 논문에서는 반능동 레이더 미사일에 대해 다양한 발사 조건과 성능 제한 조건, 표적기의 기동 등을 고려하여 최대 발사 거리 및 F-pole을 산출하고 이를 비교 분석하였다. 또한, Head-On 대치 시 수행되는 일반적 회피 기동에 대해서도 고찰하였다. 표적기와 공격기, 미사일은 질점으로 모델링하였으며 미사일은 공력 성능, 기하학적인 형상, 성능 제한사항, 탐색 레이더의 짐발 제한 등 다양한 고려 요소들을 포함시켜 기존의 연구보다 현실적인 시뮬레이션을 수행하였다. 최대 사거리는 표적기와 미사일의 운동, 미사일의 성능 제한 조건들을 만족하면서 미사일이 추적할 수 있는 최대의 시간에 명중될 수 있는 거리로서 Root Finding Method를 사용하여 산출하였다. F-pole은 명중시 공격기와 표적기와의 거리로서 공격기는 표적기에 대해 추적 유도 방식을 수행하도록 지정하여 그 거리를 산출하였다. In this study, maximum launch range and F-pole are evaluated and analyzed for the semi-active radar missile concerning various launch condition, performance limitation and target maneuvers. Furthermore, general evasion maneuvers are considered when shooter approaches to target with head-on conditions. A point-mass target, shooter and missile model is used including aircraft and missile dynamics. More realistic missile motion simulation is conducted using aerodynamic performance data, geometry, performance limitation, radar seeker performance and so on. Maximum launch range, which is the distance for intercept satisfying target and missile motion and performance, is evaluated using root finding method. F-pole, which is the distance between target and shooter when intercept is completed, is evaluated assuming that shooter maneuvers through pursuit guidance to target.

Using a Multiple-Model Adaptive Estimator in a Random Evasion Missile/Aircraft Encounter

The terminal phase (end game)of an encounter between an air-to-air missileequipped with an activemonopulse radar seeker and an evading e ghter aircraft, possibly employing electronic countermeasures in the form of electronic jinking, is addressed. The missile uses a guidance law derived from linear differential game theory, which is implemented by using a multiple-model adaptiveestimator (MMAE). TheMMAE identie es theevasion strategy of theaircraft, which consists of thecombination of evasion maneuverand electronic jinking. An extensivenumerical study is used to demonstrate the viability of the concept. In comparison with a previously proposed mixed strategy guidance methodology, the new MMAE-based approach leads to a substantial improvement in the guaranteed single-shot kill probability for the missile. ODERN air-to-air missiles, designed to intercept highly maneuverable aircraft equipped with electronic countermeasures (ECM), have to operate in a highly uncertain environment. This paper is concerned with the terminal phase (end game) of an encounter between a missile equipped with an active monopulse radar seeker and an evading e ghter aircraft having the option to use ECM. The terminal homing phase of the interception starts when the active seeker of the missile locks on its target, generating also a warning signal (including some threat identie cation ) in the aircraft. This warning is the only information the pilot has. At the moment when the warning is received, the pilot starts to execute a sequence ofperiodicalevasivemaneuvers.Simultaneously,toenhanceitssur

Preliminary Design of a Hybrid Propulsion Multimission Missile System

Apreliminarydesign,promptedbyanational design competition,wasconductedtoselecta multimissionmissile. This missile was expected to replace the Tow, Stinger, and Helle re missiles, which required it to defeat a diverse target set ranging from hardened bunkers to attacking e xed-wing aircraft. As a result, advanced technologies, which havenot been incorporated into any e elded missilesystem, hadto beevaluated, especially, but notlimited to, propulsion. Miniatureturbojets, air turborockets, pintle solid motors, pulsed solid motors, and gelled bipropellant engines were among the powerplants evaluated. The selected design used a millimeter wave radar seeker with automatic target recognition, a smart shaped-charge tandem warhead, a composite airframe, and a novel, twostage combustion gelled hybrid propulsion system. The gelled hybrid consisted of a glycidyl azide polymer solid fuel gas generator, which exhausted into the main combustion chamber, where the gas was oxidized using gelled inhibited red fuming nitric acid. The missile weighed 60 lb and had a 6-in. diameter, as well as a 14-s time of e ight to a 3-mile target. The hybrid propulsion system, with its e exible energy management and its high performance, was found to uniquely enable the multimission requirements to be met.

Signal Processor for Millimetric Wave Radar Seeker for Antitank Guided Missile

The missile borne signal processor for the millimetric wave active radar seeker of the third generation type antitank guided missile (ATGM) system with lock-on-before-launch capability is discussed. The range and angle tracking systems are described and the results are presented. Feasible improvements in signal processor using coherent-on-receive scheme for achieving higher ranges, have been identified and are being implemented.

Millimetric Wave Seeker for Third Generation Antitank Guided Missiles

For the third generation antitank guided missiles (ATGMs) with fire-and-forget and top attack capabilities, a noncoherent millimetric wave (MMW) active radar seeker has been configured with all weather capabilities. To meet the stringent dimensional and weight constraints and beamwidth requirements of ATGM, a W-band system has been designed with trans-twist antenna with a compact comparator. The paper covers the system description and critical design issues, and presents the performance results achieved so far. Areas for improvements, especially for achieving a higher range, have also been pointed out.

Millimeter-wave technology advances since 1985 and future trends

The author focuses on finline or E-plane technology. Several examples, including AVES, a 61.5-GHz radar sensor for traffic data acquisition, are included. Monolithic integrated 60- and 94-GHz receiver circuits composed of a mixer and IF amplifier in compatible FET technology on GaAs are presented to show the state of the art in this area. A promising approach to the use of silicon technology for monolithic millimeter-wave integrated circuits, called SIMMWIC, is described as well. As millimeter-wave technology has matured, increased interest has been generated for very specific applications: (1) commercial automotive applications such as intelligent cruise control and enhanced vision have attracted great interest, calling for a low-cost design approach; and (2) an almost classical application of millimeter-wave techniques is the field of radar seekers, e.g. for intelligent ammunitions, calling for high performance under extreme environmental conditions. Two examples fulfilling these requirements are described. >