TAILIEUCHUNG - Advances in Haptics Part 18

Tham khảo tài liệu 'advances in haptics part 18', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 672 Advances in Haptics b Details of typical placing Fig. 16. Manipulation using SCARA-type haptic device for electrostatic levitation handling Using Haptic Technology to Improve Non-Contact Handling the Haptic Tweezer Concept 673 7. Conclusion This research has proposed the concept of Haptic Tweezer which combines a haptic device with non-contact levitation techniques for intuitive and easy handling of contact-sensitive objects by a human operator. The levitation error of the levitated object is used as an input for the haptic device to minimize disturbances especially in the tasks of picking up and placing. The concept is evaluated by several prototypes of which two are described in this chapter one using magnetic levitation and the haptic device PHANTOM Omni using an impedance controlled strategy and a second prototype that uses electrostatic levitation and a SCRARA-type haptic device using the admittance control strategy. Experiments with the first prototype have showed that significant improvements can be realized through the haptic feedback technology. Not only the failure rates were reduced but the manipulation time was faster indicating it is easier to perform the manipulation task with haptic assistance. The second prototype showed that the concept can also be successfully applied to handling objects with electrostatic levitation which is more sensitive to disturbances than magnetic levitation and also has a much smaller levitation gap 350 pm . The haptic assistance makes it possible that a human operator can perform the tasks of picking up and placing of an aluminium disk which would not have been possible without any haptic assistance. Both cases demonstrate the potential of haptic assistance for real-time assisting in performing tasks like non-contact manipulation. 8. References Azuma R. Baillot Y. Behringer R. Feiner S. Julier S. MacIntyre B. 2001 . Recent advances in augmented reality IEEE Computer Graphics and Applications 21 6 34 - 47. Azuma R. T. .

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