Control of Shape Memory Alloy Actuated Flexible Needle Using Multimodal Sensory Feedbacks
نویسندگان
چکیده
In this paper, closed loop nonlinear control of a shape memory alloy (SMA) actuated flexible needle is presented. Merits of different modalities of sensory feedbacks are studied. In order to track the given desired trajectory, the actual position of the needle tip is controlled using three different feedback signals (i) Vision, (ii) Electromagnetic (EM), and (iii) Ultrasound (US) imaging feedback signals are considered independently. From the experimental results it appeared that the EM sensor feedback control of the flexible needle has the best tracking performance compared to the other two feedbacks.
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