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Civil aircraft flight control sensor signal reconstruction fault-tolerant control method

A flight control sensor and signal reconstruction technology, applied in the field of flight control, can solve the problems of high precision of the neural network method, sensitivity to noise and low precision of the observer method, and achieve the goals of reducing undetermined parameters, enhancing precision, and simplifying the parameter adjustment process Effect

Active Publication Date: 2021-07-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the analytical method is easy to implement but has low precision, the observer method is more sensitive to noise, and the neural network method has high precision but is difficult to implement in engineering

Method used

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  • Civil aircraft flight control sensor signal reconstruction fault-tolerant control method
  • Civil aircraft flight control sensor signal reconstruction fault-tolerant control method
  • Civil aircraft flight control sensor signal reconstruction fault-tolerant control method

Examples

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Embodiment 1

[0024] Such as figure 2 with image 3 As shown, it is a reconstruction system for implementing the above-mentioned solution involved in this embodiment, including: a signal reconstruction module and a measurement module, wherein: the measurement module is used as a signal source to collect working condition information and output it to the signal reconstruction module, by The signal reconstruction module composed of NDO and TSCKF takes the normal signal as the signal source, performs TSCKF and NDO processing to obtain the reconstructed signal used to replace the error signal.

[0025] The working condition information includes but not limited to: roll angle rate information, pitch angle rate information, yaw angle rate information, roll angle information, pitch angle information, yaw angle information, attack angle information, sideslip angle information, air speed information, aileron, rudder deflection position information, elevator rudder deflection position information a...

Embodiment 2

[0037] Such as Figure 5 with Image 6 As shown, it is a control system that implements the above-mentioned solution involved in this embodiment. Compared with Embodiment 1, this embodiment further includes: a control module and an execution module, wherein: the control module uses normal signals and reconstructed signals as signals The source generates a control command signal after calculation and processing and sends it to the execution module; the execution module changes the motion state of the control object by executing the control command signal.

[0038] The control object of this embodiment is the same as that of Embodiment 1.

[0039] This embodiment is aimed at the simulation embodiment of the sensor signal reconstruction system of the civil aircraft flight control system in the case of interference. The Cessna172 aircraft angular rate loop is selected, and its motion satisfies where: d ω For external interference, the operating point of the angular rate loop i...

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Abstract

The invention relates to a civil aircraft flight control sensor signal reconstruction and fault-tolerant control method, which comprises the following steps: selecting a volume point for a nonlinear flight control system and calculating one-step estimation; and after fault diagnosis, isolation and estimation are performed, correcting the estimation of the system state according to the estimation of the covariance matrix, and then carrying out signal reconstruction or state updating according to a fault diagnosis result. According to the invention, effective tracking of a control instruction can be realized without being influenced by sensor faults and external interference; and compared with the prior art, the fault-tolerant control system has the advantages that parameter adjustment is simpler and more convenient, the precision is higher, the workload required during parameter adjustment is remarkably reduced, and the reconstruction precision and the control robustness when the system is disturbed are improved.

Description

technical field [0001] The invention relates to a technology in the field of flight control, in particular to a fault-tolerant control method for signal reconstruction of a flight control sensor of a civil aircraft. Background technique [0002] In order to maintain and ensure the safety of flight, it is very necessary to make a fault-tolerant design of the flight control system for the failure of typical sensors. Common fault-tolerant designs in this regard include two types, hardware redundancy and resolution redundancy. Hardware redundancy refers to carrying multiple sets of sensors so that when a sensor fails, the remaining sensors can still provide accurate measurement values ​​effectively. However, hardware redundancy brings high hardware cost, design cost and maintenance cost. [0003] Signal reconstruction, that is, the construction of corresponding equations through the analytical relationship between the kinematics and dynamics of the various parameters of the ai...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F17/16G06F119/20
CPCG06F30/20G06F17/16G06F2119/20
Inventor 刘世前马欣健程慧慧谢新宏马珍杰
Owner SHANGHAI JIAO TONG UNIV
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