A Finite State Machine-Based Combined Adjustment Method for Airbag-Line Driven Spinal Orthotics

CN122297212APending Publication Date: 2026-06-30BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIHANG UNIV
Filing Date
2026-04-07
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing spinal orthotics struggle to balance corrective force and wearing comfort. A single drive mode cannot meet the dual requirements of structural corrective torque and high-frequency micro-motion adaptive buffering. Rigid drives lack compliance, while flexible drives have insufficient force density.

Method used

A combined adjustment method of airbag-wire driven spinal orthosis based on finite state machine is adopted. Through the coordinated control of the wire drive motor and airbag, the length of the drive rope is precisely controlled by the admittance control algorithm. The airbag, as a local adjustment unit, passively absorbs the high-frequency small-amplitude displacement disturbance caused by human breathing and micro-movement of body position. The layered design reduces the pressure of rigid braces.

Benefits of technology

It improves the stability and continuity of the orthopedic effect, enhances the flexible drive orthopedic force and airbag drive control range, reduces the pressure of rigid braces, and enhances the overall orthopedic effect of the orthodontic device.

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Abstract

This invention discloses a method for joint adjustment of an airbag-line driven spinal orthosis based on a finite state machine, comprising: constructing a task scheduling mechanism according to the finite state machine; performing system initialization configuration of the main control unit; acquiring force sensor feedback data based on the task scheduling state of the initialization configuration; performing data verification, actual force value analysis, and admittance control calculation on the feedback data; generating a target position command; using the target position command to control the line drive motor; performing linkage detection of the airbag through the motor state based on the motor feedback information; generating an airbag control command based on the air pressure error based on the detection result; performing local adjustment according to the airbag control command and synchronizing the control cycle; and resetting the scheduling state according to the synchronization result. This method utilizes a layered design to reduce the pressure of rigid braces, improve the flexible drive orthotic force and airbag drive control range, adapt to changes in human dynamic posture, and balance orthotic accuracy with wearing comfort.
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