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Mechanical systems are analogous to to electrical networks where springs and masses play similar roles to inductors and capacitors, respectively. A viscous damper in mechanical systems functions similarly to a resistor in electrical networks, dissipating energy. The forces acting on a mass in such systems include an applied force in the direction of motion, counteracted by forces from the spring, a viscous damper, and the mass's acceleration. This interplay of forces is mathematically...
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The mechanical efficiency of a machine is a fundamental concept that describes how effectively a machine can convert input work into output work. According to this concept, the efficiency of a machine is equal to the ratio of the output work to the input work. An ideal machine, meaning a machine that has no energy losses, has an efficiency of one. This implies that the input work and the output work are equal.
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Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation
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Millirobots de actuación magnética impulsados por momento

Min Wang1,2,3, Wenlong Wu3,4, Zeju Zheng3,5

  • 1Department of Data and Systems Engineering, The University of Hong Kong, Hong Kong SAR, China.

Nature communications
|December 27, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Este estudio presenta un millirobot magnéticamente accionado internamente que supera los entornos de alta fricción. Logra un alto empuje para la locomoción y el transporte de carga en condiciones desafiantes.

Palabras clave:
RobóticaActuación magnéticaMillirobotsLocomociónTransporte de cargaEntornos de alta fricciónCiencia de materialesFísica

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Área de la Ciencia:

  • Robótica; Ciencia de materiales; Física

Sus antecedentes:

  • El diseño de millirobots para entornos de alta fricción es un desafío debido a la limitada producción de fuerza y los ineficientes mecanismos de transmisión a pequeña escala.; Los diseños de millirobots existentes luchan por generar suficiente fuerza para superar una resistencia friccional significativa.

Objetivo del estudio:

  • Presentar un novedoso millirobot magnéticamente accionado internamente capaz de generar un alto empuje para navegar en terrenos de alta fricción.; Demostrar la capacidad del millirobot para superar la fricción y transportar cargas pesadas en diversos entornos.

Principales métodos:

  • Se desarrolló un millirobot con actuación interna con una matriz de doble bobina y un imán permanente central.; Se utilizó la interacción magnética para impulsar el imán, generando un empuje instantáneo a través del impacto.; Se aprovecharon los principios de conservación del momento para la propulsión.

Principales resultados:

  • El millirobot genera una fuerza de empuje superior a 15 N con un peso corporal de 5,82 g.; Se alcanzó una velocidad del imán de 2,10 m/s en 17 ms utilizando una corriente de 0,5 A.; Operó con éxito en aceite viscoso, atravesó arena y medios granulares, y transportó carga de más de 300 veces su peso corporal.

Conclusiones:

  • El diseño de millirobot accionado magnéticamente internamente ofrece una alta capacidad de fuerza para aplicaciones en espacios confinados y de alta fricción.; Este método de propulsión supera las limitaciones de los millirobots tradicionales en entornos desafiantes.; Se demostró el potencial de acceso a entornos tubulares confinados y transporte robusto de carga.