| 王罗俊， 彭来湖， 史伟民.针织选针器小尺度往复摆动特性研究[J].轻工机械,2019,37(1):16-22 |
| 针织选针器小尺度往复摆动特性研究 |
| Research on Dynamic Characteristics of Reciprocating Pendulum Stroke of Knitting Needle Selector |
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| DOI：10.3969/j.issn.1005 2895.2019.01.003 |
| 中文关键词: 选针器 提花 位移传感 应变片测力 激光测振 信号处理 |
| 英文关键词:needle selector jacquard displacement sensing strain gauge force measurement laser vibration measurement signal processing |
| 基金项目:国家自然科学联合基金重点项目（U1609205）。 |
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| 摘要点击次数: 847 |
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| 中文摘要: |
| 针对针织核心器件选针器的刀头在小尺度内往复摆动时双稳态特性差异大，导致选针工作不稳定的问题，分析选针器工作原理，构建三维及力学模型，研究选针器刀头小尺度范围内往复摆动，刀头与挡板撞击的完整过程及动态力学特性。在剖析刀头摆动及撞击2个阶段运动特性的基础上，采用高精度激光位移传感器、应变片测力装置以及激光多普勒测振仪等精密仪器对其刀头的往复摆动和与挡板的撞击过程进行测量；利用LabVIEW和MATLAB等软件对采样的数据进行处理、分析及特性曲线重构。得出了选针器工况作业指标和针对刀头摆动及撞击2阶段的力学特性，并在实验及理论数据上的校对分析为基于刀头撞击振动检测的选针闭环控制策略提供依据。 |
| 英文摘要: |
| Aiming at the problem that when the blade head of the needle selector of the knitting core device oscillates back and forth on a small scale, there is a great difference in the bistable characteristics, resulting in instability of needle selector. The principle of needle selector was analyzed, three dimensional and mechanical models were built and the complete process and dynamic mechanical properties of the impact between the reciprocating swing of head of needle selector in a small scale range and the baffle were studied. On the basis of analyzing the motion characteristics of blade head in the two stages of swing and impact, precision instruments such as high precision laser displacement sensors, strain gauge force measuring devices, and laser doppler vibrometers were used to measure the reciprocating oscillation of the needle selector blade head and the collision process with the baffle. Software programs such as LabVIEW and MATLAB were used to process, analyze and reconstruct the characteristic curve of the sampled real time data. The operating index of the needle selector in working condition and the mechanical characteristics of the two stages of the swing and impact of blade head were obtained, and proofreading analysis of experimental and theoretical data provided the theoretical basis for closed loop control strategy of the needle selection based on vibration detection of the impact of the blade head. |
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