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17-09-2009, 01:10 AM
The digital data bus MILSTD 1553B was designed in early 1970's to replace analog point to point wire bundles between electronic instrumentations. The MILSTD 1553B has four main elements.
1. Bus controller to manage information flow.
2. Remote terminals to interface one or more subsistence.
3. Bus monitor for data bus monitoring.
4. Data bus components. Including bus couplers, cabling, terminators and connectors.
This is a differential serial bus used in military and space equipments comprised of multiple redundant bus connection and communicates at one MBps. Bus has single active bus control and up to 31 remote terminals. Data transfer contain up to 16 bit data word.
MILSTD 1553 is military standard that defines the electrical and protocol characteristic for data bus. A data bus is used to provide a medium for exchange of data between various systems. It is similar to LAN in personal computers and office automation industry. A data transmission medium which would allow all systems and subsistence to share a common set of wires was needed. So MILSTD 1553 standard redefines TDM as the transmission of data from several signal sources through one communication system with different signal samples staggered in time to form a composite pulse train.
In 1968 SAE a technical body of military and industrial members estd a subcommittee to define a serial data bus to meet the needs of military avionics community under the project and implimentation name A 2 - K. This subcommittee developed first draft in 1970. In 1973 MILSTD 1553 was released through F - 16 fighter plane.
Then MILSTD 1553 A was released in 1975 through air forces F 16 and army's attack helicopter AH - 64 A Apache. 1553 B was released in 1978. The SAE decided to freeze the standard to allow the component manufacturers to develop real world 1553 products.
Applied to satellites as well as in space shuttles. Used in large transporters, aerial refuelers and bombers, tactic fighters and helicopters. It is even contained in missiles and may act as primary interface between aircraft and missiles. Navy has applied this data bus to surface and subsurface applications. Army has put 1553 in to tanks.
Commercial applications have applied standard to systems like manufacturing production lines and BART (bay area rapid transport). UK has issued standard 0018 P and NATO has published STANAG 3838 AVS both in accordance to 1553 B. MILSTD 1760 A the air craft store interconnect has 1553 B embedded in it
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