| Shen Haobo (沈浩波),Fang Yubin,Zhu Yuanke,Liang Chaojun.[J].高技术通讯(英文),2026,32(2):177~192 |
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| Integrated motion and vibration control of hot-end nozzle in space FDM equipment based on improved Fx-LMS algorithm |
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| DOI：10. 3772 / j. issn. 1006-6748. 2026. 02. 007 |
| 中文关键词: |
| 英文关键词: spatial fused deposition modeling equipment, motion-vibration integration, spatial micro-vibrations, variable step-size Fx-LMS, co-simulation |
| 基金项目: |
| Author Name | Affiliation | | Shen Haobo (沈浩波) | (School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213000, P. R. China) | | Fang Yubin | | | Zhu Yuanke | | | Liang Chaojun | |
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| 中文摘要: |
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| 英文摘要: |
| Aimed at the problem that the hot-end nozzle of gantry-type space fused deposition modeling ( FDM) equipment is susceptible to vibrations in the space environment, leading to the deterioration of manufacturing accuracy and forming quality, an integrated motion and vibration control strategy is proposed. The strategy comprehensively integrates motion control based on predefined trajectory data with adaptive vibration suppression implemented by the hyperbolic tangent function-based variable step-size Fx-LMS ( least mean square) algorithm (HTVSLMS), achieving the synchronous improvement of printing trajectory tracking accuracy and vibration suppression efficiency.Firstly, the dynamic model of the hot-end nozzle of the gantry-type space FDM equipment is established, and its vibration characteristics under microgravity and noise disturbance environments are analyzed. Secondly, the motion stability of the actuator is improved through the interpolation and control optimization of the predefined trajectory. Finally, the step size is automatically adjusted by HTVSLMS algorithm, and an adaptive balance between fast convergence and steady-state accuracy is achieved. Different from existing studies where motion control and vibration suppression are usually handled independently, trajectory predefined control and adaptive vibration suppression are deeply integrated for the first time in this paper. Simulation results demonstrate that compared with the traditional fixed step-size Fx-LMS or other variable step-size algorithms, the proposed method exhibits significant advantages in trajectory tracking accuracy, vibration suppression effect, and robustness, providing new technical approaches and ideas for the performance improvement of space-borne on-orbit additive manufacturing equipment. |
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