tailieunhanh - Cutting Edge Robotics Part 8

Tham khảo tài liệu 'cutting edge robotics part 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Adhesion Forces Reduction by Oscillation and Its Application to Micro Manipulation 201 during manipulation. Its computational load is low. Since vision sensor is usually used in micro manipulation and any other sensors are not needed the total system is very simple and low cost. Lastly applying this method to micro manipulation we develop an automatic control system for micro manipulation. 2. Target system Fig. 3 shows the target system which consists of manipulation part image-capturing part end-effector-oscillating part and displacement-measuring part. For the simplicity we assume that 1 the manipulation is done in a planner space and a gravity force doesn t work 2 the object is a sphere 3 the end-effector the sub end-effector and the substrate are made of a same material 4 the end-effector the sub end-effector and the substrate are grounded for preventing an extra charge at the initial state. The manipulation part consists of end-effector sub end-effector micro object and substrate. The end-effector and the sub end-effector are cantilever beams made of copper in size of mm . The beams are rolled copper and any surface treatments such as grinding are not conducted. Young s modulus of copper is N m2 its Poisson s ratio is and its density is 8900 kg m3 . On the end-effector the PZT piezocell Fuji ceramics C6 of mm is bonded at the position of 1 mm from the clamped end for oscillating the end-effector. The surface of substrate is a copper cut bonded on an aluminum board. The end-effector and the sub end-effector are attached on XYZ stage Surugaseiki PMZG413 which can be controlled by PC. The object is a glass sphere Union unibeads with a radius of 100 or 200 10-6m and a copper sphere with a radius of 150 106m . Young s modulus of glass is N m2 its Poisson s ratio is and its density is 2500 kg m3 . The image-capturing part consists of Video-microscope Surugaseiki VMU-V with objective lens Mitsutoyo .

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