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<p>Laser direct imaging (LDI) machines are advantageous for the fabrication of printed circuit boards (PCBs). Before digital lithography, a vision-based measurement (VBM) system was used to calibrate PCBs. However, calibration accuracy and efficiency are affected by multiple disturbances. To improve the accuracy and enhance the robustness of the VBM system, we propose a piezoelectric-actuated kangaroo-inspired bionic compliant mechanism (BioCM) and a flying-focusing VBM controller. A piezoelectric actuator (PEA) generates highly accurate motion. The CM transfers the motion without losing accuracy or producing couplings. The kangaroo-inspired bionic differential structure enlarges the magnification of the PEA-CM. A BioCM-based VBM system was also constructed. A static analysis of the BioCM was conducted using the compliance matrix approach, and dynamics results were obtained. To enhance the service performance of the PEA-BioCM, we developed a flying-focusing VBM controller. PEG-based flying, PEA-actuated focusing, and MEMF-enhanced RRHT algorithms were used. A BioCM prototype was fabricated. Several prototype tests were conducted on the statics and dynamics. The prototype test results verified the performance of the BioCM and flying-VBM controller. Service test results demonstrated the calibration accuracy and robustness of the PEA-BioCM-based flying-VBM system. The proposed BioCM and controller can contribute to the development of next-generation LDI machines for fabricating high-density PCBs.</p>

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Design and Control of a Piezoelectric-actuated Kangaroo-inspired Bionic Compliant Mechanism for LDI Machines

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月10日

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  • Ruizhou Wang,
  • Long Yang,
  • Zhouliang Li,
  • Hua Wang,
  • Xianmin Zhang

摘要

Laser direct imaging (LDI) machines are advantageous for the fabrication of printed circuit boards (PCBs). Before digital lithography, a vision-based measurement (VBM) system was used to calibrate PCBs. However, calibration accuracy and efficiency are affected by multiple disturbances. To improve the accuracy and enhance the robustness of the VBM system, we propose a piezoelectric-actuated kangaroo-inspired bionic compliant mechanism (BioCM) and a flying-focusing VBM controller. A piezoelectric actuator (PEA) generates highly accurate motion. The CM transfers the motion without losing accuracy or producing couplings. The kangaroo-inspired bionic differential structure enlarges the magnification of the PEA-CM. A BioCM-based VBM system was also constructed. A static analysis of the BioCM was conducted using the compliance matrix approach, and dynamics results were obtained. To enhance the service performance of the PEA-BioCM, we developed a flying-focusing VBM controller. PEG-based flying, PEA-actuated focusing, and MEMF-enhanced RRHT algorithms were used. A BioCM prototype was fabricated. Several prototype tests were conducted on the statics and dynamics. The prototype test results verified the performance of the BioCM and flying-VBM controller. Service test results demonstrated the calibration accuracy and robustness of the PEA-BioCM-based flying-VBM system. The proposed BioCM and controller can contribute to the development of next-generation LDI machines for fabricating high-density PCBs.