Hot answers tagged

61

There are three different ways that aircraft can give internet access to its passengers, which will most likely be on at around 38,000 feet. First off, to have Inflight wifi, there needs to be a ground-based internet server, a transmitting dish, or a satellite dish. There must also be a receiving and transmitting antenna on the aircraft and an onboard server ...


10

A Line Replaceable Unit is a piece of hardware that can be exchanged for a replacement part in a relatively short time by only opening and closing fasteners and connectors. You will find the term LRU in avionics but also in ATC hardware. Examples are FMC, transponder, etc. When you have a complex avionics system you tend to end up with a great variety of ...


6

Built In Test Equipment is part of a system that monitors the correct functioning of that system. It produces an alert if part of the system fails to fulfil its function. An example would be a system with two sets of memory chips; the BITE would copy all data to set 1, then test memory set 2 by writing and reading various test patterns. If the read pattern ...


5

An IMA is a computer network utilising the ARINC bus system that interconnects various devices. This is in contrast to Line Replaceable Units LRU'S where they are standalone systems that can be replaced. Basically they are electronic boxes typically in the aircrafts electronics bay that can be swapped out quickly. Because they can be swapped out quickly they ...


5

The primary difference is that the B777 is the AIMS (airplane information management system). It is a Honeywell developed system where all the software on the systems is controlled by Honeywell (closed system). The biggest downside to the closed system is maintenance and support. The A380 system is a semi-open IMA system. It has a single supplier hardware ...


2

In the IMA architecture, processing modules are hosted in a cabinet and are interconnected via a high speed bus. B777 uses "SAFEBUS" which is ARINC 659 on the backplane and ARINC 629 externally (same protocol, different physical layer). Airbus uses ARINC 664 internally and externally for the bus. Legacy bus interfaces go through an I/O module or other bus ...


1

There are some resources. This source shows how AFDX is used as the backbone of the IMA (Integrated Modular Avionics) and lists subsystems such as the air data inertial reference units (ADIRU), Engine Electronic Controllers (EEC) and Electrical Load Management (ELM) Systems as 'members' of the network. This archived article talks about the development of ...


1

The Aircraft System Manufacturer is the company developing the system that is being implemented on IMA hardware (supplied by the Avionic Module Supplier). They will likely develop software to load onto the IMA hardware to perform certain functions. For example: Airbus would like to implement a Thrust Reverser Control System for their new airplane. The ...


Only top voted, non community-wiki answers of a minimum length are eligible