Abstract
This paper proposes a locomotive, therapeutic microrobot based on an electromagnetic actuation (EMA) system for intravascular treatment. The proposed EMA system consists of the two pairs of stationary Helmholtz and Maxwell coils along the x-axis and two pairs of rotational uniform saddle coil (USC) and gradient saddle coil (GSC) about the x-axis. A microrobot actuated by this type of EMA system can be used as a locomotive, therapeutic microrobot in medical applications. Especially, when we apply sinusoidal currents to the Maxwell coil and GSC pairs, the microrobot shows oscillatory forward and backward motion (which is called as hammering motion); however, when sinusoidal voltages are applied to the Maxwell coil and GSC pairs, the microrobot does not show the desired hammering motion. W proposes a compensation algorithm for the resistance and inductance variations and demonstrates the desired hammering motion for the effective therapeutic function of the microrobot. Through various experiments, we validate that the proposed microrobot using the EMA system can show precise locomotion and provide enhanced treatment.
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