CSD19860210 2011-1-16 14:18
同意ls的,丝带机会优先用于破坏对方的C3I节点,必要时也在己方空防体系的配合下用来猎杀对方的丝带机
顺便说下,隐身战机不是雷达发现不了,而是发现距离大幅度下降。另外,空战中雷达需要连续照射目标才能锁定,而隐身技术可以破坏这个连续性
无源雷达反隐形是没问题的,但是需要敌机打破静默开雷达或通信,而且雷达站使用时本身不能移动,不然自身坐标变化会影响解算精度
[[i] 本帖最后由 CSD19860210 于 2011-1-16 14:26 编辑 [/i]]
sky0480000 2011-1-16 14:26
科技就是竞争力,研发是一定的,方向也正确,但是不要把J-20看得太高了,在战斗机的研发上我们的历史还太短,是不可能在短时期内就可以自主研发出世界上超美俄的先进战机,只要不是太落后就可以了,另外有了先进战机,没有足够的经费保障战斗机驾驶员训练也是白搭,飞机好还要有一流的驾驶员操作才行。
jx4177 2011-1-16 15:50
[quote]原帖由 [i]CSD19860210[/i] 于 2011-1-16 14:18 发表 [url=http://67.220.91.16/bbs/redirect.php?goto=findpost&pid=66408316&ptid=3607088][img]http://67.220.91.16/bbs/images/common/back.gif[/img][/url]
同意ls的,丝带机会优先用于破坏对方的C3I节点,必要时也在己方空防体系的配合下用来猎杀对方的丝带机
顺便说下,隐身战机不是雷达发现不了,而是发现距离大幅度下降。另外,空战中雷达需要连续照射目标才能锁定,而隐身技术可以破坏这个连续性
无源雷达反隐形是没问题的,但是需要敌机打破静默开雷达或通信,而且雷达站使用时本身不能移动,不然自身坐标变化会影响解算精度 [/quote]
四代机有不用AESA的吗?对着定向照射和伪随机码跳频的AESA,无源雷达有没有响应都是个大问题。
假如说靠接收外部反射雷达波定位,隐身机为啥会叫做隐身机,不就是它的雷达反射波远比正常战机小么?:sleep
werl0508 2011-1-16 21:16
什么时候中国第五代战机能够提前出来,并用于实战,那才有可能遏制对手.
tzh5555 2011-1-17 07:20
唯武器论不一定有用,再先进的武器没有高素质的人操纵也是白搭。
boxi6675 2011-1-18 14:12
本身四代和五代的标准各国都不见得相同,克制一种武器应该有另一种更高级武器来实现,不是同类型克制同类型.
kenoo7 2011-1-31 20:19
虽然J20总体的试飞表现还不错,但跟美国的F22还是有距离的,特别是发动机的推力是严重不足的
yuwenni888 2011-2-4 23:45
*** 作者被禁止或删除 内容自动屏蔽 ***
pakucha 2011-2-5 10:04
嘛,一路看来,二位写了N多,贴点儿资料凑热闹
[url]http://en.wikipedia.org/wiki/Zaslon_radar[/url]
Description
[color=Blue]The Zaslon is a Pulse-Doppler radar with a passive electronically scanned array (PESA) antenna and digital signal processing(额,第一句话就是Zaslon他就是个PESA……)[/color]. The antenna used by the Zaslon is actually a multi-channel system comprising two separate electronically controlled arrays, an X-band radar with 1700 emitters and a L-band transponder with 64 emitters brought together into a single antenna [1]. The antenna has a diameter of 1.1 meters and is fixed in position with a scanning sector of +/-70 degrees in azimuth and +70/-60 degrees in elevation [2]. The X-band components of the radar uses reciprocal ferrite phase shifters that allow the radar to position beams in around 1.2 msec [1]. This high performance is one of the big advantages of phased array radars compared with the previous generation of mechanically scanned arrays which take seconds to perform the same functions as a phased array. The detection performance of the Zaslon radar is stated to be 200 km against a target with a Radar cross section (RCS) of 16 m2, the radar can track up to 10 targets while engageing 4 of those at any one time with either R-33 radar guided or R-40, R-60 IR guided air to air missiles [2].
Zaslon-M
The development of the modernised MiG-31M in 1983 and later the MiG-31BM interceptors also led to the introduction of an improved Zaslon fire control radar, the Zaslon-M. The Zaslon-M differs from the original Zaslon radar in firstly having a larger antenna, increased to 1.4 meters in diameter and an increased detection range of 300–400 km. Tracks 24 targets at once, engages 6. In April 1994 used with an R-37 to hit a target at 300 km distance. The radar is also compatible with the advanced R-37 radar guided air to air missile[color=Blue](表示基本上就是JX君前面铁的那部分了,改进的是有的,但是完全木有写啥直接改变雷达类型)[/color]
[url]http://en.wikipedia.org/wiki/AESA[/url]
An Active Electronically Scanned Array (AESA), also known as active phased array radar is a type of phased array radar whose transmitter and receiver functions are composed of numerous small solid-state transmit/receive modules (TRMs). AESAs aim their "beam" by broadcasting radio energy that interfere constructively at certain angles in front of the antenna. They improve on the older passive electronically scanned radars by spreading their broadcasts out across a band of frequencies, which makes it very difficult to detect over background noise. [color=Blue]AESAs allow ships and aircraft to broadcast powerful radar signals while still remaining stealthy.
(AESA能够使飞机以及船只在隐身状态下发出强大的雷达信号)[/color]
[color=Red]The primary advantage of a AESA over a PESA is that the different modules can operate on different frequencies. (AESA与PESA最大的区别就是前者不同的模块可以使用不同的频率工作)[/color]Unlike the PESA, where the signal was generated at single frequencies by a small number of transmitters, in the AESA each module broadcasts its own independent signal. This allows the AESA to produce numerous "sub-beams" and actively "paint" a much larger number of targets. Additionally, the solid-state transmitters are able to broadcast effectively at a much wider range of frequencies, giving AESAs the ability to change their operating frequency with every pulse sent out. AESAs can also produce beams that consist of many different frequencies at once, using post-processing of the combined signal from a number of TRMs to re-create a display as if there was a single powerful beam being sent
List of existing systems
US based manufacturers of the AESA radars used in the F22 and Super Hornet include Northrop Grumman[3] and Raytheon.[4] These companies also design, develop and manufacture the transmit/receive modules which comprise the 'building blocks' of an AESA radar. The requisite electronics technology was developed in-house via Department of Defense research programs such as MIMIC Program.[5][6]
[color=Red]
Airborne systems(现存的空中AESA系统,蓝色的均为米国货)[/color]
[color=Blue]
* Northrop Grumman/Raytheon AN/APG-77, for the F-22 Raptor
* Northrop Grumman AN/APG-80, for the F-16E/F Block 60 Fighting Falcon
* Northrop Grumman AN/APG-81, for the F-35 Joint Strike Fighter
* Northrop Grumman Multi-role AESA, for the Boeing Wedgetail (AEW&C)
* Northrop Grumman APY-9, for the E-2D Advanced Hawkeye
* Northrop Grumman SABR, for F-16 Fighting Falcon upgrades
* Raytheon AN/APG-63(V)2 and AN/APG-63(V)3, for the F-15C Eagle and Republic of Singapore's F-15SG
* Raytheon APG-79, for the F/A-18E/F Super Hornet and EA-18G Growler
* Raytheon AN/APQ-181 (AESA upgrade currently in development), for the B-2 Spirit bomber[/color]
* AMSAR, research from the European GTDAR consortium, for Eurofighter and Rafale fighter Radar(双风用的)
* Captor-E CAESAR (CAPTOR Active Electronically Scanning Array Radar)
* RBE2-AA Radar à Balayage Electronique 2 - Active Array
* SELEX Seaspray 7000E, for helicopters
* SELEX Vixen 500E
* Mitsubishi Electric Corporation J/APG-1, AESA for the Mitsubishi F-2 fighter(鬼子F2用的)
* Ericsson Erieye AEW&C
* Ericsson PS-05/A MK-5 for JAS 39 Gripen. Will be available by 2012.
* Phazotron NIIR Zhuk-AE, for MiG-35(毛子货)
* Tikhomirov NIIP Epaulet-A(看名字继续是毛子货)
* Elta EL/M-2083 aerostat-mounted air search radar
* Elta EL/M-2052, for fighters. Interim candidate for HAL Tejas. Also, suitable for F-15, MiG-29 & Mirage 2000
* Elta EL/M-2075 radar for the IAI Phalcon AEW&C system
* NRIET-designed (Nanjing Research Institute of Electronic Technology) radar mounted on the KJ-2000 AEW&C system(这个应该是天朝的吧?KJ2000系统,KJ---空警?预警机?)
* Toshiba HPS-106, air & surface search radar, for the Kawasaki P-1 maritime patrol aircraft, four antenna arrays.
* Mitsubishi Electric Corporation HPS-104, for the Mitsubishi SH-60(鬼子反潜直升机的……震惊了……反潜需要这种程度的高科技不可么?)
[url]http://en.wikipedia.org/wiki/Passive_electronically_scanned_array[/url]
[color=Blue]A passive electronically scanned array (PESA), contrary to its active counterpart AESA, is a phased array which has a central radiofrequency source (PESA,与AESA不同,使用一个中央电子波段源)[/color](such as a magnetron, a klystron or a travelling wave tube), sending energy into (usually digitally-controlled) phase shift modules, which then send energy into the various emitting elements in the front of the antenna. [color=Blue]AESA devices, in contrast, have each of their elements contain its own radiofrequency source. A PESA radar is therefore simpler to construct than an AESA.(相反,AESA其每一部分都拥有各自的波段源,因此,PESA比起AESA更加容易制造。)[/color]
[color=Red]
Most phased array radars in the world are PESA.(现存的电子扫描阵列雷达多为PESA) [/color]Microwave Landing System uses PESA transmit-only arrays.
[color=Blue]List of PESA radars(PESA雷达表)[/color]
* AN/MPQ-53
* AN/SPQ-11 Cobra Judy
* AN/SPY-1 Aegis combat system
* AN/TPQ-36 and AN/TPQ-37 Firefinder radars
* AN/TPS-59
* AN/APY-1/2 E-3 Sentry
* AN/APQ-164 B-1B (Northrop Grumman formerly Westinghouse ESG)
* AN/APQ-181 B-2 Spirit
* Flap Lid and Tomb Stone for the SA-10 and SA-20 systems respectively
* Rajendra Radar[1]
[color=Blue] * Zaslon, first-ever electronically scanned radar in a fighter jet (MIG-31)(于是再次证明,这个系列它就是PESA……)[/color]
* N035 Irbis (see Sukhoi Su-35BM)
* RBE2 (Rafale)
* NIIP N011M Bars for SU-30MKI
* Zhuk-ME (MiG-29K)
嘛,貌似这类资料复制+粘贴的活儿交给俺这样的酱油党就好,没啥可争论的……
另外,第一次海湾战争的时候,貌似天朝绝大多数现在服役的先进装备都才刚刚开始开发,甚至完全没有开始开发(某坦克?飞机?潜艇?军舰?)……除了震慑性战略武器,和数量上的优势以外……额……求zhenchuan筒子科普下当时我军先进之处?
[[i] 本帖最后由 pakucha 于 2011-2-5 10:37 编辑 [/i]]
kichee 2011-2-5 10:25
几代机的概念是美国提出来的,中国没有必要跟着美国走,要不然老跟在人家后面
jx4177 2011-2-5 12:02
[quote]原帖由 [i]pakucha[/i] 于 2011-2-5 10:04 发表 [url=http://67.220.91.16/bbs/redirect.php?goto=findpost&pid=67204161&ptid=3607088][img]http://67.220.91.16/bbs/images/common/back.gif[/img][/url]
嘛,一路看来,二位写了N多,贴点儿资料凑热闹
[url]http://en.wikipedia.org/wiki/Zaslon_radar[/url]
Description
The Zaslon is a Pulse-Doppler radar with a passive electronically scanned array (PESA) antenna an ... [/quote]
十分感激阁下提供的资料。:teeth
jjbb123456 2011-2-8 08:30
同意楼主观点,美国飞机技术领先世界各国,不能以已之短克彼之长。盲目追着美国跑。但是发展4代机也是必要的,能带动多个行业进步。所以一定要自研,不能像印度只知道花钱买。技术是买不来的。
我本闲散之人 2011-2-8 08:49
四代机的出现有它的真正实力体现,要不俄罗斯及世界各大国也不会争着研四代机了。而美国还在俄罗斯及中国的周围用四代机来耀武扬威,用它来给小日本及韩国棒子来鼓士气。可以说在这世界上没有决定性的武器就注定要挨打的,如果中国在六十年代没有原子弹和氢弹的话也许不会有现在的今天。而现在中国的四代机的出现也一样,四代一出,周边国家及欧美就都对中国刮目相看了,而俄罗斯在武器上也不能最由它们说了算,中国也不会象印度一样在武器价格及性能上由老毛子自夸自擂了。中国能造出四代机,最大的威力就是知道四代机所有的优势及对抗它的办法,中国不可能象美国烧钱样的装备(因为美国的很多钱都是掠夺世界的血汗钱的,中国现阶段没有这实力和野心)。中国如果在四代机的缺点上大作文章,也许在世界上能树立好的榜样,让世界不在美国佬的大棒下接受美国的敲诈(当然前题要在世界把四代机的缺点及反制办法公布出来及偷卖)。这也许是对付四代的最大世界作用了。
Chinarenmmzh 2011-2-8 09:11
四代真的很牛啊 矛现在这么厉害了 盾还没长进 真想知道什么能取代雷达
zhenchuan 2011-2-8 14:59
[quote]原帖由 [i]pakucha[/i] 于 2011-2-5 10:04 发表 [url=http://67.220.93.4/forum/redirect.php?goto=findpost&pid=67204161&ptid=3607088][img]http://67.220.93.4/forum/images/common/back.gif[/img][/url]
嘛,一路看来,二位写了N多,贴点儿资料凑热闹
[url]http://en.wikipedia.org/wiki/Zaslon_radar[/url]
Description
The Zaslon is a Pulse-Doppler radar with a passive electronically scanned array (PESA) antenna an ... [/quote]
今天大年初6有点时间上上网,没想到还有人在计较米格31,额有点震精了。
我也是搞不懂有什么好争的,不就是有源雷达嘛,连印度找毛子买的那个米格-29K/KUB都是有源雷达,这米格31就不可以有吗?给个不可以有的理由好不。别搞的什么都只能美国有似的,神经兮兮的。
拉来一大片英文后,还没忘记伊拉克这茬事,还想再比下是中国强还是伊拉克强是吧?对不起,本人智商还没有问题,这个话题不讨论。
qianlong001 2011-2-8 15:58
中国拥有歼20的意义,我觉得首先不在于克制F22,而在于一种强大的威慑力。我歼20不见得能打得过你F22,但总可以打得过你F15、F16吧,你美国的F22总共不过176架,总不能全部部署到中国方面吧。真正发生空战,主力应该还是大量的三代机在交战,而中国拥有歼20,至少是可以威慑你三代机不敢肆无忌惮的进攻吧!如果中美两国发生战争,肯定是在太平洋的东海岸进行的,也就是说是在靠近中国的海岸线附近开展,到时中国可以依托岸基雷达和地空导弹的帮助,由歼20带领歼10、歼11与美国进行周旋,即使不能独占制空权,但也不会让美国独占制空权的。纵观美国上世纪六十年代后发动的诸次战争,总是在取得完全的制空权的情况下再投放地面部队,没有取得制空权,美国就不敢大规模地投放地面部队,可见制空权对于美国军队的重要性。其次,中国研制成功歼20的意义在于向美国等传统强国展示中国军事科研的发展成果,向世界证明中国的强大研发能力,这是比部署几十架四代机更有威慑力的事情了。第三,在现阶段,中国肯定还不具备与美方发动全面战争的能力,而且中国也从未向外界表示过跟美国争霸权的目的,中国现阶段的目的,应该还是以收回台湾为主,完成祖国统一大业。维护祖国领土完整,是全中国人民的共同愿望,歼20将是中国达到这一目的的排头兵。
pakucha 2011-2-8 16:24
[quote]原帖由 [i]zhenchuan[/i] 于 2011-2-8 14:59 发表 [url=http://67.220.91.30/bbs/redirect.php?goto=findpost&pid=67351385&ptid=3607088][img]http://67.220.91.30/bbs/images/common/back.gif[/img][/url]
今天大年初6有点时间上上网,没想到还有人在计较米格31,额有点震精了。
我也是搞不懂有什么好争的,不就是有源雷达嘛,连印度找毛子买的那个米格-29K/KUB都是有源雷达,这米格31就不可以有吗?给个不可以有的理由 ... [/quote]
嘛,有人连续发了N贴跟别人争论说Zaslon-M它就是AESA雷达,于是挖来某百科,证明这位雷达美眉她没做手术变成AESA.没想到跟人家扯了好几页AESA,PESA的那位反而不耐烦了,转进说“不可以有么?”
某人说天朝军队海湾战争时比伊拉克军队先进,问一句先进在哪里,求科普,于是某人急了,万分激动地表示不屑于讨论这个他自己提出的话题……
我膜拜!顺带一句至少俺引用的东西1有来源链接2有粗劣翻译,不像某人,自信满满的夸夸其谈(可惜貌似是错的?),却啥东东都拿不出来……于是也没啥跟您磨损键盘的兴致了……
又于是我二人的意见首次一致,可喜可贺,可喜可贺!
[[i] 本帖最后由 pakucha 于 2011-2-8 16:57 编辑 [/i]]
chongsis 2011-2-8 19:24
J20象征性意义大于实战意义,另外,四代是尖利的矛,但最强的盾可能还要是路基的设备
hopefast 2011-2-8 21:15
虽说我们也有了4代,但我们现在还是步步都落在人后,如果没有在某些方面有所创新的话我们永远都只能跟在美国后面。前阵子美国那边又有消息称X-37B试飞成功,不知道大家又作何感想呢?我们也要去搞一个一样的东西出来?还是想办法搞个更好的出来?