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俄罗斯空气动力研究所中心学报

ISSN 打印: 1948-2590
ISSN 在线: 1948-2604

俄罗斯空气动力研究所中心学报

DOI: 10.1615/TsAGISciJ.v42.i2.80
pages 245-258

STABILITY EVALUATION OF AN AIRPLANE WITH A DIGITAL MULTIRATE CONTROL SYSTEM IN A LATERAL MOTION

Sergey Georgievich Bazhenov
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky str. 1, Zhukovsky, Moscow region, 140180 Russia

ABSTRACT

Stability margins of an airplane with a control system are analyzed for lateral motion. Different architectures of the control system are considered, namely, the analog system, the digital single-rate control system (single-channel and triplex-channel cases), and the digital multirate control system (single-channel and triplex-channel cases). The effect of interchannel data equalization on the stability margins of the closed-loop system "airplane-Fly-By-Wire (FBW) system" is analyzed. While analyzing the stability of a multiloop system, its decomposition to internal contours is used. The stability analysis of a triplex system includes cases of a failed sensor of backloop signal in one channel.


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