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논문 기본 정보

자료유형
학술대회자료
저자정보
In-Won Park (NASA Ames Research Center) Vytas SunSpiral (NASA Ames Research Center)
저널정보
제어로봇시스템학회 제어로봇시스템학회 국제학술대회 논문집 ICCAS 2014
발행연도
2014.10
수록면
1,331 - 1,338 (8page)

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We are developing impedance controlled twisted string actuators (TSA) for use in tensegrity robots, as an alternative to traditional spooled cable actuation. Tensegrity robots are composed of continuous tension and discontinuous compression elements, with no rigid joints between elements, which give them unique force distribution properties. The use of tensegrity robots is strongly motivated by biological examples, and they are capable of locomotion and manipulation by changing lengths of their continuous network of tensional elements, which is also the primary pathways for load transfer through the structure. TSA show the potential to address some of the unique engineering challenges faced by tensegrity structures, and provide unique qualities well suited to an actively controlled tension system, such as compact, light-weight mechanical structures, inherent compliance, variable “gearing”, and the ability to transmit high forces with a very low input torque. The inherent variable compliance of impedance control is essential for tensegrity robots to move through and manipulate the environment, and is a natural match to the unique qualities of TSA. This paper briefly introduces the tensegrity robots in the NASA Ames Intelligent Robotics Group and an overview of their future application to space planetary exploration. Then the effectiveness and robustness of TSA are verified through the performance of impedance control modes.

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Abstract
1. INTRODUCTION
2. TENSEGRITY ROBOTS
3. IMPEDANCE CONTROLLED TWISTED STRING ACTUATOR
4. EXPERIMENTAL RESULTS
5. DISCUSSION AND FUTUREWORK
REFERENCES

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