A distributed flying parameter system based on 1394b and its realization method

Abstract

The invention belongs to the technical field of avionics, and in particular relates to a 1394B-based distributed flight reference system and an implementation method thereof. The system includes distributed flight reference collector, recorder, cache recorder, application unit, 1394B bus and management unit. Before the 1394B-based distributed flight reference system works, allocate the bus bandwidth and broadcast time point of the distributed flight reference collector. When working, the distributed flight parameter collectors collect their own flight parameters, and the management unit broadcasts the time stamp signal through the 1394B bus. Each distributed flight parameter collector [1] determines the parameters according to the time stamp signal and the offset clock at the time of collection. At the corresponding time, the collected parameters are uniformly packaged, and broadcast to the 1394B bus according to the pre-allocated broadcast time point. Compared with the traditional flying reference system, the system and method have higher bandwidth and reliability, and have arbitrarily extended application units.

Description

technical field [0001] The invention belongs to the technical field of avionics, and in particular relates to a 1394B-based distributed flight reference system and an implementation method thereof. Background technique [0002] The flight reference system is an important aviation airborne equipment and one of the must-installed equipment for the aircraft. It mainly collects and records various parameters on the aircraft. Under normal circumstances, the recorded parameters can be used for aircraft maintenance, fault diagnosis and training evaluation. After the plane crash, it can be used to investigate and analyze the cause of the accident. [0003] At present, the flying ginseng system is mainly composed of collectors, recorders, cache recorders and other equipment, such as figure 2 Shown is the current layout of the flight reference system on the aircraft, in which several signal sources D are distributed throughout the aircraft, all of which are connected to the port of ...

AI Technical Summary

Problems solved by technology

[0004] This centralized collection method will inevitably bring about difficulties in aircraft wiring and increase in weight. Since the collection port is far away from the signal source, it is also not conducive to the improvement of small signal collection accuracy.

When it is necessary to add a new application unit for the extended application of flight parameters, it is often necessary to redesign or change the collector to add a new port, formulate a transmission protocol and the application unit for data transmission, and the expansion is extremely inconvenient

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