FC control system for ultrasonic vibration source applied flat damper to generate functional textures.

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K14208
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 20010:Mechanics and mechatronics-related
• Research Institution: Akita National College of Technology
• Principal Investigator: Sakurada Akira 秋田工業高等専門学校, その他部局等, 准教授 (90442681)
• Project Period (FY): 2022-04-01 – 2024-03-31
• Keywords: 機能性テクスチャ / 平面減衰機構 / 超音波援用加工 / 分数階微積分 / Fractional Culculus / 熱揺らぎ / FC制御

Outline of Final Research Achievements

The study of blade edge control in ultrasonic-assisted cutting for the generation of functional textures was investigated. In ultrasonic-assisted cutting, it is sometimes difficult to combine high speed and high accuracy. New mathematical method called Fractional Calculus (FC) is introduced for thin-flat damper applied shear to the direction of vibration and new control method was applied with the purpose of reducing cutting tact time. This study confirms that the ultrasonic vibration cutting amplitude of the ultrasonic vibration byte changes from the thermal vibration fluctuations of the ultrasonic vibration source. As a solution, a drive amplifier has been developed to prevent changes in the cutting amplitude. The effect of FC control techniques on flat damper and ultrasonic vibration sources is limited. However, a drive amplifier that prevents changes in the processing amplitude was found to be more effective as expected.

Free Research Field

制御工学

Academic Significance and Societal Importance of the Research Achievements

超音波援用加工に必要とされる高速および高精度を両立し，加工における熱揺らぎの影響を抑制する研究は非常に重要な項目の一つとなっている．非線形性を有する制御対象に分数階微積分（FC：Fractional Culculus）という新たな数学の手法の導入は，新たな研究分野の開拓の一歩と期待でき，今後も研究を継続していく．
加工性能を低下させることなく，加工振幅を維持する方法を明らかにした本研究は，本制御技術とシステムが種々の対策の手法として検討され，機械加工分野へ貢献できると期待できる．