A Method for Analyzing Transmission Characteristics of 1553b Bus Network
A technology of bus network and transmission characteristics, which is applied in the field of analysis of 1553B bus network transmission characteristics, can solve problems such as changes in bus topology, influence on bus transmission characteristics, and waveform distortion, so as to reduce simulation time, facilitate computer automatic realization, and reduce the amount of calculation small effect
Active Publication Date: 2011-12-28
BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
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Problems solved by technology
The access of the stub line causes the change of the characteristic impedance of the main bus, which causes the reflection of the waveform, and the attenuation of the bus causes the waveform distortion
[0004] The 1553B bus used in the aerospace system has an inter-stage bus separation operation, which will cause changes in the bus topology and affect the bus transmission characteristics
If the impact of network topology on bus network performance is verified by physical objects, the cycle will be long and the cost will be high
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[0026] The present invention will be further introduced below in conjunction with the drawings.
[0027] The S-domain model is to equate several core components of the 1553B bus (the circuit composed of bus cables, stubs, coupling transformers, isolation resistors, termination resistors and terminals) into a two-port network, and then use the two-port network cascade The s-domain solution is used to derive the response of each point on the transmission line network, and the complex frequency domain solution of the uniform transmission line is directly used to describe the voltage and current at the source and load ends. At each coupling point (ie, the device access point on the 1553B bus), the 1553B bus network is connected to two transmission lines. The analysis of the 1553B bus network is mainly the analysis of the reflection and transmission at the coupling. The main point of S-domain modeling is to cascade the networks between a pair of coupling points one by one, so the ent...
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The invention discloses a method for analyzing the transmission characteristics of a 1553B bus network, which includes the steps of determining the analysis starting point to obtain an equivalent circuit; the step of iteratively calculating the voltage between the sending end and the destination terminal according to the equivalent circuit; and determining the network transmission characteristics according to the obtained voltage. Step; a step of evaluating the topology of the 1553B bus network by using the transmission characteristics of the network. The invention avoids the inconvenience of analyzing the transmission characteristics of the 1553B bus network through physical verification, and optimizes the design process of the 1553B bus network.
Description
Technical field [0001] The invention belongs to the technical field of bus design and relates to a method for analyzing the transmission characteristics of a 1553B bus network. Background technique [0002] As a real-time control bus, the 1553B bus has the characteristics of definite transmission time and reliable data transmission. It has a wide range of applications in aviation and aerospace systems. The 1553B bus signal propagates in the bus network in the form of Manchester bi-phase level code (rectangular wave). The bus terminal device samples the network communication signal with its internal clock, and judges the information content according to the rising and falling edges of the transmission signal. [0003] The typical transmission signal of 1553B bus network is 1MHz, and the typical characteristic impedance of ideal bus network is 75Ω. Changes in the bus network topology have caused changes in output characteristics. The access of the stub causes a change in the chara...
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Login to View More IPC IPC(8): H04L12/24H04L12/26H04L12/40
Inventor 张敬波刘江项宗友李辉
Owner BEIJING AEROSPACE AUTOMATIC CONTROL RES INST