A Fault Separability Evaluation Method for UAV Flight Control System

A technology of flight control system and evaluation method, applied in general control system, control/adjustment system, test/monitoring control system, etc., can solve the problem of inability to quantitatively evaluate the difficulty of fault separation, failure to comprehensively evaluate residual vector distance and The difference in direction, failure to consider the impact of unknown input on fault separation, etc.
CN106325264BActive Publication Date: 2018-08-14SHANDONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG UNIV OF SCI & TECH
Publication Date
2018-08-14

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Abstract

The invention relates to a fault separability evaluation method of an unmanned aerial vehicle flight control system. In order to realize the optimal design of the UAV flight control system, it is necessary to evaluate the difficulty of system fault separation in the UAV design stage. The present invention establishes the UAV flight control system model according to the UAV flight control system principle and fault type; uses the equivalent space method to construct the fault diagnosis residual generator; uses the cosine distance of the residual vector caused by different faults to establish the fault separation condition ; Using the similarity of the residual vector to quantitatively evaluate the difficulty of fault separation, combining the distance similarity and direction similarity in pattern recognition, an improved quantitative evaluation index of fault separability is proposed. The evaluation method can comprehensively evaluate the difference in distance and direction of residual vector caused by different faults, and provide a reference for the design of UAV system and fault separation algorithm.
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Description

technical field

[0001] The invention relates to a fault separability evaluation method of a UAV flight control system, which is used to evaluate the difficulty of implementing fault separation for actuator faults and sensor faults in the UAV flight control system, and belongs to the UAV system fault separation technology field. Background technique

[0002] UAVs are widely used in modern reconnaissance, engineering surveying and mapping, and scientific experiments, and have considerable military and civilian prospects. The UAV flight control system is the control system for the UAV to achieve autonomous or semi-autonomous flight. It plays a vital role in stabilizing and controlling the attitude of the UAV and managing the UAV to complete tasks.

[0003] UAVs are susceptible to complex environmental factors during flight, and the flight control system will inevitably fail, which will easily cause the UAV to fail to complete the task, and even cause the UAV to crash. At pres...

Claims

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