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Su-35BM Avionics

Information Management System (IMS)

The Su-35 is intended both for single and for group usage. In the latter case, the aircraft can operate in a group numbering up to 16 of the same type or older airplanes. The commander of a combined group receives full information about the target situation which is received from his own supporting aircraft and commanders of interacting groups. He will have the capability to operating in networks of ground and naval forces and also in networks of AWACS airplanes. As a result, on the group commander's display will be presented full tactical and operational information which prevails at the given time. This is one of the most important features of the Su-35 avionics, which is evidence of its position in approaching the fifth generation aviation complex. As is known, the effectiveness of a combat unit which has inserted into a common control system grows in numbers in comparison with traditional types of combat equipment.

The avionics, in contrast to the first version of the Su-35, are supplied by the Russian company MRPC AVIONICA, specializing in the development of aircraft avionics. The Su-35BM will count on a system of four fly-by-wire digital chanals of control called SDU-427. The configuration of cockpit of the Su-35BM has two large 23X30cm LCD viewfinder. One monitor displayes tatical combat information and navigation, with the secondary monitor provides other information about the aircraft for the pilot. In the field of Electronic Warfare, an un-specified set of equipment operates in several ways: "Self-defense", "Mutual Protection" or "Protection of Group". It will count on the system of protection for eletronic war L175M Khibiny-M. It is integrated with the Russian GLONASS system of global positioning. It also uses LINK 16, adata-communication system datalink standard of NATO, an unimaginable situation until recent years.

The distinctive feature of Su-35 is the employment of a new suite of onboard instruments. Its core is the information management system (IMS), which integrates functional, logical, informational and software subsystems into a single complex that ensures the interaction between the crew and equipment. The IMS includes two central digital computers, commutation and information devices and an indication system built on the "all-glass cockpit" concept.

The core of the Su-35 cockpit instrumentation suite are two full-color multi-function liquid crystal displays of MFI type, a multi-function panel with a built-in display processor, a wide angle collimatory display on the windshield and a control and indication panel.

MFI multi-function displays with a built-in processor measure 9 x 12 inches (diagonal 15 inches) and have a resolution of 1400x1050 pixels. They are intended for reception, processing and production, in a multiple window mode, of graphic, numeric, alphabetic and symbolic information. They also present televised information received from onboard TV sensors and impose on it synthesized numeric, alphabetic and symbolic information. Besides, they produce and send video signals in a digital format to the video record unit. The multi-function panel with a built-in display processor presents the required information and issues commands by pushing the buttons on the button array at any time in flight. The airborne collimatory display with a built-in processor monitors the space beyond the cockpit. The information is processed by control signals. The collimator angle of view is 20x30?.

The onboard systems and armament in the new cockpit of Su-35 are controlled by buttons and switches on the aircraft control joystick and engine control levers as well as by a button array on multi-function displays. Thus the HOTAS concept is realized on this type of aircraft. The displays and some other avionics systems of Su-35 are developed by Instrument Design Bureau of Ramenskoye and affiliated companies of Tekhnokompleks Research and Production Association.

Among other new onboard systems of the Su-35 is modern navigation and radio communication equipment, systems maintaining fighters operation in a formation and a highly efficient electronic countermeasures suite. The component package of the latter and its complementation with specific jamming devices can be determined by the customer.

Irbis-E radar control system

The core of the Su-35 armament is a new radar control system with a phased antenna array (Irbis-E - "snow leopard"). It features unique capabilities in terms of the target detection range. This is a development V V Tikhomirov Research Institute of Instrument Production. In design, this is an X-waveband multi-role radar with a passive phased antenna array (PAA) mounted on a two-step hydraulic drive unit (in azimuth and roll). The antenna device scans by an electronically controlled beam in azimuth and angle of elevation in sectors not smaller than 60. The two-step electro-hydraulic drive unit additionally turns the antenna by mechanic means to 60 in azimuth and 120 in roll. Thus, in using the electronic control and mechanical additional turn of the antenna, the maximum deflection angle of the beam grows to 120. Irbis-E radar control system detects and tracks up to 30 air targets, retaining continuity of space observation and engaging up to eight targets. The system detects, chooses and tracks up to four ground targets in several map-making modes with various resolution at a range of up to 400 km, without stopping to monitor the airspace.

Irbis-E radar detects air targets with an absolute cross section of 3 m2 on a head-on course at a range of up to 400 km. Being an improvement on radars with a PAA, Irbis has much better capabilities: expanded (by more than twice) operating frequency band, increased from 70? to 120? target detection and tracking zone in azimuth, substantially (by 2-2.5 times) increased effective range, improved anti-jamming capability, etc. In this aspect, Irbis is comparable to the best foreign counterparts, outperforming most of the US- and Wes-European-made radars with passive and active PAA.

The Research Institute has been developing Irbis since 2004. By now, the engineering prototypes of the system have passed the required bench trials. The first of them has been installed on the Su-30MK2 flying laboratory and is undergoing flight tests. The first flight of the flying laboratory with Irbis onboard occurred in early 2007 at Gromov Flight Test Institute. During the flight, the laboratory proved the superior performance of the new radar in the air-to-surface operating mode.

The radar on this new version of the Su-35 will be able operate in several bands, including X-band, and other frequency bands, thanks to the computer processor. The antenna has a diamentro of 900mm, with vertical polarization of waves and full-rate capacity in only 0.4ms. It can turn in azimuth of 60 degrees up to 120 degrees, with maximum angle of controlled deflection for eletronic and mecanical system. The radar is the Irbis-E Active Electronically Scanned Array (AESA) type, which is able to control up to 30 targets and able to go off against 8 different targets. It can control active and semi-active guidance missiles simultaneously. In the air-to-ground mode the numbers are no less impressive: four tracked targets at the same time, and two being attacked of one time. The radar can track the movement of targets in real time working in Dopler and SAR modes. The Irbis-E can detect an aircraft with 3m of RCS at a distance of 400 kilometers. And against aircraft with low RCS it can detect at 90km distance, while it can detect an aircraft with an RCS as small as 0.01m^2.

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Page last modified: 09-07-2011 13:22:49 ZULU