An intestinal capsule robot driven by non-contact rotating magnetic field with radial clearance compensation function was proposed. This robot was composed of four copper tiles linked together with robot body by X bars. When the robot rotated in the intestine, X bars of four copper tiles were extended synchronously by centrifugal forces to reduce radial clearance compensation of this robot. This radial clearance was existed between the surface of the capsule robot and the intestine inner wall. Experiments had demonstrated that the swimming speed of the capsule robot were significantly improved by effective reducing the dynamic pressure membrane thickness.
A model of composite mortar barrel made of carbon fibre reinforced plastic (CFRP) jacket and steel liner was developed based on the finite method. The multi-objective particle swarm optimization (MOPSO) was employed for the multi-objective design of composite mortar barrel during design processing. The winding angle of carbon fibre and the thickness of composite layers are defined as optimization variables. The fundamental frequency and structure weight of barrel are defined as optimization objectives. The Pareto solution set of composite mortar barrel is obtained by MOPSO. The corresponding design solution of composite mortar barrel is improved in stiffness and weight.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.