A method for modeling the dynamics of an aircraft with a multi-degree of freedom actuator

By using the virtual power principle and the recursive modeling method of multibody system topology, the problem that traditional aircraft dynamics modeling cannot describe multi-degree-of-freedom actuators is solved, and support for refined dynamics modeling and high-performance control algorithms for aircraft is realized.

CN119939754BActive Publication Date: 2026-05-19BEIJING AEROSPACE TECH INST
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Patent Information

Application Number
CN202411782956.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-06
Publication Date
2026-05-19
Estimated Expiration
2044-12-06

AI Technical Summary

Technical Problem

Traditional aircraft dynamics modeling methods cannot accurately describe the relative motion of components in aircraft with multi-degree-of-freedom actuators, leading to stability and maneuverability issues. Furthermore, existing methods cannot meet the precise design requirements of high-performance control algorithms.

Method used

By adopting the virtual power principle and the recursive modeling method of multibody system topology, the aircraft is regarded as a multi-rigid-body system, a deformable multibody system dynamic model is established, and a multibody dynamic model is constructed through kinematic description and virtual power equation, and then incorporated into the traditional flight mechanics description framework.

Benefits of technology

This method enables a refined dynamic description of multi-degree-of-freedom actuator aircraft, improves the systematicity and accuracy of modeling, reduces the errors caused by decoupling coupling terms in traditional methods, and is suitable for high-performance control algorithm design.

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Abstract

The application provides a kind of aircraft dynamics modeling method containing multi-degree-of-freedom actuator, the modeling method returns general mechanics and advanced theory and thought of mechanics basic disciplines, aircraft is regarded as multi-rigid body system, based on virtual power principle and multi-body system topological configuration recursive modeling method, the deformation multi-body system dynamics model suitable for aircraft containing multi-actuator is established, and the motion characteristics of multi-degree-of-freedom, strong coupling between the motion characteristics of aircraft external body attitude motion and internal component relative motion are accurately described.
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