Overview of medium and low speed aerospace electronic bus

Overview of medium and low speed aerospace electronic bus ：
1.MIL-STD-1553B
1)1553B Full name of bus ： Time division command inside the aircraft / Responsive multiplex data bus ;
2) Domestic corresponding standards ：GJB289A-97;
3) Transmission rate ：1Mb/S;
4) transport ： Half duplex ,BC->RT; Word length 20bit, Effective length of data 16bit; Redundant bus topology , Dual redundancy fault tolerance mode ;
5) Number of equipment ：BC Allow... On the bus RT Most devices 31 individual ;
6) application ： US military fighter , Missile control , Ship control ; It has been applied to weapon systems in China in the past decade ;
7) Transmission medium ： Shielded twisted pair .

2.ARINC429
1)429 Full name of bus ： Digital information transmission system ;
2) Domestic corresponding standards ：HB6096-SZ-01;
3) Transmission rate ：100Kb/s;
4) transport ： One way broadcast , Interface oriented data transmission structure ;
5) Number of equipment ： Two devices are defined on the bus , There can only be one sending device , The receiving device can have multiple ;
6) application ： A civil airliner , Russian military aircraft .

3.MIL-STD-1773

1)1773 Full name of bus ： Time division command inside the aircraft / Responsive multiplex data bus , It's actually 1553B An improvement of bus on transmission medium ;
2) Domestic corresponding standards ：GJB289A-97;
3) Transmission rate ：1Mb/s,20Mb/s;
4) transport ： Half duplex ,BC->RT; Word length 20bit, Effective length of data 16bit; Redundant bus topology , Dual redundancy fault tolerance mode ;
5) Number of equipment ：BC Allow... On the bus RT Most devices 31 individual ;
6) application ： US military fighter ,NSNA;
7) Transmission medium ： Optical fiber .

4.STANAG 3910
1)3910 Bus ： Nordic new data bus , It can be connected through shielded twisted pair MIL-STD-1553B System , Upgrade it ;
2) Domestic corresponding standards ：
3) Transmission rate ：1Mb/s,20Mb/s;
4) transport ： Dual rate transmission bus structure ;
5) Number of equipment ：
6) application ： Eurofighter ;
7) Transmission medium ： Shielded twisted pair and optical fiber .

5.RS485 Bus
1)485 Bus ： Serial data interface standard ;
2) Domestic corresponding standards ：;
3) Transmission rate ：10Mbps;
4) transport ： Bus topology , Balanced sending , Differential reception ;
5) Number of equipment ： A master-slave mode , One master with multiple slaves ;
6) application ： Industrial control , automobile , A ship ;
7) Transmission medium ：.

6.ARINC629
1)629 Bus ： New bus digital autonomous terminal access communication , stay 429 On the basis of , combination 1553B The advantages of ;
2) Domestic corresponding standards ：;
3) Transmission rate ：2Mb/s;
4) transport ： Linear topology , No need for centralized control , No bus controller is required , Self control , Two way control and transmission ;
5) Number of equipment ：;
6) application ： Boeing civil aircraft ;
7) Transmission medium ： Current type couplers are required .

7.CAN Bus
1)CAN Bus ： Controller area network , At present, fieldbus is a very representative bus ;
2) Domestic corresponding standards ：;
3) Transmission rate ：1Mb/s;
4) transport ： Single bus , Serial communication network for distributed control and real-time control ;
5) Number of equipment ： Multi master bus ;
6) application ： Modern cars , The bus system in aerospace field requires high real-time performance 、 Reliability and anti-interference performance ,CAN Some problems of the bus itself limit its application in this field ① Unpredictability ② Information error blocking ③ System redundancy support ;
7) Transmission medium ： Twisted pair 、 Coaxial cable or optical fiber .

summary ： The communication rate should be considered when selecting bus for aerospace avionics system 、 reliability 、 anti-interference 、 Compatibility 、 Scalability and other requirements ,1553B,ARINC429,1773,ARINV629 Such bus data technology has the above advantages , It has been widely used in the field of aerospace .