avionics question bank and notes
-
Upload
faisal-muhammed-mavathu -
Category
Documents
-
view
15 -
download
4
description
Transcript of avionics question bank and notes
![Page 1: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/1.jpg)
MIL-STD-1773
Mohamed Sameer T K
Dept. of Aeronautical
JCET
MODULE 2
![Page 2: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/2.jpg)
MIL-STD-1773
Fiber-optic version of 1553B
It also operates at the rate of 1Mbps
It also have the same 20 bit word and threewords, command word, status word and dataword
![Page 3: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/3.jpg)
WHY OPTICAL FIBER?
Though 1553B is used in various modern aircraft,it is recognized that buses operate in extremelysevere environment like
EMI from intersystem and intra system
Lightning
Electrostatic discharge
High Altitude Electromagnetic pulse
![Page 4: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/4.jpg)
AFDX
![Page 5: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/5.jpg)
AFDX
Avionics Full DupleX Switched Ethernet (AFDX) is
a standard that defines the electrical and protocol
specifications (IEEE 802.3 and ARINC 664, Part 7)
for the exchange of data between Avionics
Subsystems.
One thousand times faster than its predecessor,
ARINC 429, it builds upon the original AFDX
concepts introduced by Airbus.
One of the reasons that AFDX is such an attractive
technology is that it is based upon Ethernet, a mature
technology that has been continually enhanced
![Page 6: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/6.jpg)
Increase flexibility in Avionics design
Reduce aircraft wire counts, thus lowering aircraft
weight and cost
Its first major use in A3xx
Faults can be isolated and analyzed without impacting the
system as a whole
ARINC 429 data bus may still be used but the main
Avionics data pipe will be Ethernet (AFDX) of 100 Mbps
AFDX
![Page 7: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/7.jpg)
AFDX Network
![Page 8: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/8.jpg)
AFDX system comprises the following components:
1. Avionics Subsystem: The traditional Avionics
Subsystems on board an aircraft, such as the flight
control computer, global positioning system, tire
pressure monitoring system, etc.
An Avionics Computer System provides a
computational environment for the Avionics Subsystems.
Each Avionics Computer System contains an embedded
End System that connects the Avionics Subsystems to
an AFDX Interconnect.
AFDX Network
![Page 9: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/9.jpg)
2. AFDX End System (End System): Provides an
"interface" between the Avionics Subsystems and
the AFDX Interconnect. Each Avionics Subsystem
the End System interface to guarantee a secure and
reliable data interchange with other Avionics
Subsystems.
3. AFDX Interconnect: A full-duplex, switched Ethernet
interconnect. It generally consists of a network of
switches that forward Ethernet frames to their
appropriate destinations
AFDX Network
![Page 10: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/10.jpg)
HSDB
![Page 11: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/11.jpg)
HSDB
• Used in F-22 Advanced tactical fighter
• Generic version SAE Aerospace Standard 4074.1
• 50 Mbps- linear bus
• For optical medium implementation – star
topology
• HSDB uses distributed control in which each
terminal is permitted to transmit only when it
receives the token frame.
![Page 12: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/12.jpg)
SCI
![Page 13: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/13.jpg)
SCI
IEEE –STD-1596-1992
SCI is an interconnect system for both backplane and LAN
usage.
Operates at 1 Gbps
Electrical links upto 30m and optical links upto several
kms.
Same Bandwidth as today’s 155Mbits/sec ATM links , 32
times that of today’s fiber optic channel and 800 times that
of Ethernet.
![Page 14: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/14.jpg)
![Page 15: avionics question bank and notes](https://reader030.fdocuments.in/reader030/viewer/2022020208/55cf9afd550346d033a45135/html5/thumbnails/15.jpg)
To meet the Demands of Avionics requirements
for Highly Sophisticated fighter aircraft
Data Rate
Message Length
Max No. of Stations
Transmission Technique
Access Protocol
1 Mbps (LS), 20Mbps (HS)
Word Length 16 Bits
32 Word(LS), 4096 Word (HS)
32
Half - Duplex
Command /Response