A discrete dynamic modeling method for a space solar panel servo motor system

By constructing global explicit analytical equations and combining them with dynamic modeling methods for permanent magnet synchronous motors and harmonic reducers, the problems of inaccurate electromechanical coupling and external disturbance modeling in existing technologies are solved, achieving high-precision electromechanical system simulation and control effects.

CN122154222APending Publication Date: 2026-06-05CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING UNIV
Filing Date
2026-03-10
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies lack low-dimensional explicit dynamic equations that can reflect electromechanical coupling, external disturbances, and internal dissipation mechanisms, resulting in inaccurate modeling of space solar panel servo systems and making it difficult to achieve high-precision control.

Method used

By employing global explicit analytical equations and combining dynamic modeling methods for permanent magnet synchronous motors, harmonic reducers, and flexible solar panels, a holistic discrete dynamic model is constructed, encompassing the electromagnetic input of the motor to the motion response of the solar panel. This model includes generalized coordinates, generalized external forces, and dissipative force models.

Benefits of technology

High-precision electromechanical coupling simulation of flexible loads was achieved, accurately reflecting the influence of external disturbances and internal damping on system motion. Low-dimensional dynamic equations suitable for control algorithm design were derived, improving system stability and control performance.

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Abstract

The application relates to a discrete dynamics modeling method for a space solar panel servo motor system, and belongs to the technical field of dynamics modeling of mechanical and electrical systems of space vehicles. The method aims to solve the problems of mechanical and electrical separation, neglect of flexible load dynamic reaction and lack of external disturbance response mechanism in existing modeling. The technical scheme is as follows: a global explicit analytical equation is established by integrating the electromagnetic characteristics of a permanent magnet synchronous motor, the transmission of a harmonic reducer and the load characteristics of a solar panel, and a response model of the solar panel to space disturbance force is constructed. The model can truly reflect the coupling influence of a large-inertia flexible load on the system, realize high-precision mechanical and electrical joint simulation, quantitatively analyze the action of external disturbance and internal dissipation, and derive low-dimensional explicit dynamics equations, which are convenient for combination with a control system and provide a reliable theoretical model basis for servo control algorithm design.
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