A Magnetically Actuated Octopuslike Robot Capable of Moving in 3D Space Magnetic driving is an excellent noncontact method that can penetrate through the human and the biological tissues without any damage. Also, micronano robots are expected to enter into the human body, which will bring about revolutionary development in robotics. Here we propose an octopuslike soft robot that is expected to be used in biomedical and engineering fields in the future. Firstly, we establish a magnetic control system, which uses the minimum number of coils. The system can respond quickly with high precision and can propel robot in 3D space utilizing the coupled field contributed by multiple electromagnets acting in concert. Based on the system, we designed an octopuslike robot with three legs. The robot can move freely without constraints in the workspace. We apply triangular wave gradient magnetic field, which makes the movement of the robot more stable and controllable. At the same time, the swing of the tail increases the moving precision of the robot and make the control easier.

Swimming Characteristics of Soft robot with Magnetoelastic Material Cableless microrobots have exhibit great capabilities for remote applications in small and constrained environments, especially in biotechnology and healthcare. This paper presents a swimmer propelled by its undulatory deformation using magnetoelastic composite material. The robot can move freely on water surface driven through a function of magnetic field, such as forward, backward and steering with different velocity. The magnetic field is generated by 3D Helmholtz coils, and the locomotion of the micro swimming robot is controlled by different applied magnetic field. To understand the characteristics of the swimmer, the force balance equation is established, and the morphologies of swimmer with different magnetic field are analyzed and described through finite element analysis method. Furthermore, we discuss and analyze relationship between the parameters of magnetic field and the speed of the swimmer. The experimental results verified the speed model of the swimming robot, which is influenced by the frequency and strength of magnetic field.