http://www.dsti.net/Information/News/56515
雷聲公司和波音公司完成“聯合空對地導彈”三模導引頭的一系列飛行試驗
2010-02-01
[據英國《飛行國際》2010年1月27日報導]隨著“聯合空對地導彈”(JAGM)競標日期的臨近,雷聲公司/波音公司正在緊張地進行各種準備工作,並已經完成了關鍵系統三模導引頭的一系列試驗。這種三模導引頭是雷聲公司設計的,試驗載機是UH-1直升機,驗證了導引頭在眾多靜止物體中識別坦克、卡車以及建築物的能力。美國陸軍要求“聯合空對地導彈”三模導引頭可全天候跟蹤機動目標,但上述的一系列系留試驗中並不包含這種能力。“聯合空對地導彈”是“聯合通用導彈”專案2006年中止後提出的,可裝備戰鬥機和直升機,將取代鐳射制導的“海爾法”AGM-114反坦克導彈以及光學制導的“幼畜”AGM-65通用戰術導彈,並計畫在2016年服役。該彈的射程將是AGM-114反坦克導彈的2倍,最大攻擊距離可達16 km。此外美國陸軍和海軍還要求該彈具有全天候和惡劣氣象條件下攻擊機動目標的能力。該彈採用三模導引頭,半主動鐳射為基本制導模式,增加的紅外成像制導模式主要是為了在夜間跟蹤目標,而毫米波雷達制導模式則是為了在雨天跟蹤目標。(中國航空工業發展研究中心 魯進軍)
http://www.flightglobal.com/articles/2010/01/27/337676/raytheonboeing-team-tests-tri-mode-seeker-for-missile.html
DATE:27/01/10
SOURCE:Flight International
Raytheon/Boeing team tests tri-mode seeker for missile fly-off
By Stephen Trimble
As the competition for the joint air-to-ground missile (JAGM) contract nears the fly-off stage, the Raytheon/Boeing team has completed a series of flight tests on the critical tri-mode seeker system.
Flying the Raytheon-designed seeker aboard a Bell UH-1 helicopter confirmed the system's ability to distinguish between a mix of stationary targets, including tanks, trucks and buildings, says Mike Riley, Raytheon's business development manager for army systems.
Although the US Army requires the tri-mode seeker to track moving targets in all weather, those advanced sensor functions were not included in the captive carry tests, Riley says.
The Raytheon/Boeing and Lockheed Martin teams are scheduled to stage an entire fly-off later this year, with the winner advancing into the engineering, manufacturing and development phase, and later, full-rate production and service entry in fiscal year 2016.
Winning the JAGM contract represents a massive business opportunity for both competitors. The multi-warhead JAGM will replace ageing stocks of the laser-guided Lockheed AGM-114 Hellfire and the optically guided Raytheon AGM-65 Maverick.
The army and the US Navy, however, want the JAGM to be useful even for extreme scenarios, such as if a target is moving at night and in bad weather.
Raytheon and Lockheed are each designing a tri-mode seeker, with a semi-active laser as the primary guidance system. The seeker also integrates an imaging infrared camera to track targets at night and a millimetre wave radar to track targets in the rain.
For Raytheon's team, Boeing is responsible for providing the JAGM missile body, which is based on the UK's MBDA-developed Brimstone missile, and an all-new and advanced rocket motor.
The JAGM will be fired from helicopters and fighters, which poses a technical challenge for the rocket propellant. The Hellfire, for example, uses a no-smoke propellant. At very low temperatures, the chemical mixture can debond from the rocket casing and crack, creating a explosion when ignited, says Steve Sherrick, a Boeing business development manager.
Drawing on Raytheon's and Boeing's experience with supplying missiles for fighters, the former team believes it can offer a low-risk propellant that meets the low-temperature requirement, Sherrick says. The JAGM also seeks to double the range of the Hellfire missile, increasing to 16km (8.6nm) when fired from a helicopter.
The JAGM programme emerged after the Joint Common Missile contract awarded to Lockheed was terminated in 2006. Rather than award a traditional development contract, the US government chose to fund a competitive fly-off, with the selected missile to require only minimal further development before entering service.
But having two missiles available at the end of the fly-off could spark a debate about the JAGM's sole-source strategy, Riley says.
The idea of a dual-source strategy has come up in "discussions we've had with folks in [the Office of the Secretary of Defense]", Riley says. "There's been a discussion of having multiple sources for production. Just because you're talking about winner-takes-all, that may not be the best strategy for the industrial base."