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- W2012252188 abstract "This paper presents a miniature manipulator that can provide rotations around two perpendicularly intersecting axes. Each axis is actuated by a pair of shape memory alloy (SMA) wires. SMA wire actuators are known for their large energy density and ease of actuation. These advantages make them ideal for applications that have stringent size and weight constraints. SMA actuators can be temperature-controlled to contract and relax like muscles. When correctly designed, antagonistic SMA actuators have a faster response and larger range of motion than bias-type SMA actuators. This paper proposes an antagonistic actuation model to determine the manipulator parameters that are required to generate sufficient workspace. Effects of SMA prestrain and spring stiffness on the manipulator are investigated. Taking advantage of proper prestrain, the actuator size can be made much smaller while maintaining the same motion. The use of springs in series with SMA can effectively reduce actuator stress. A controller and an anti-slack algorithm are developed to ensure fast and accurate motion. Speed, stress, and loading experiments are conducted to demonstrate the performance of the manipulator. (Some figures may appear in colour only in the online journal)" @default.
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- W2012252188 date "2013-07-03" @default.
- W2012252188 modified "2023-10-18" @default.
- W2012252188 title "A two-degrees-of-freedom miniature manipulator actuated by antagonistic shape memory alloys" @default.
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- W2012252188 doi "https://doi.org/10.1088/0964-1726/22/8/085006" @default.
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