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相关概念视频

Motor Units00:46

Motor Units

A motor unit consists of two main components: a single efferent motor neuron (i.e., a neuron that carries impulses away from the central nervous system) and all of the muscle fibers it innervates. The motor neuron may innervate multiple muscle fibers, which are single cells, but only one motor neuron innervates a single muscle fiber.
Transformers01:26

Transformers

A device that transforms voltages from one value to another using induction is called a transformer. A transformer consists of two separate coils, or windings, wrapped around the same soft iron core. However, they are electrically insulated from each other.
The iron core has a substantial relative permeability. Therefore, the magnetic field lines generated due to the current in one winding are almost entirely confined within the core, such that the same magnetic flux permeates each turn of both...
Motor Units01:13

Motor Units

The motor unit is a fundamental component of the neuromuscular system and plays a crucial role in coordinating muscle contractions. It consists of a somatic motor neuron, which connects and controls multiple skeletal muscle fibers, forming a single functional segment. The axon of the motor neuron branches out and establishes synaptic connections known as neuromuscular junctions with individual muscle fibers within the motor unit.
Motor units come in different sizes, with smaller units...
Muscle Coordination and Action01:24

Muscle Coordination and Action

Muscle coordination is a complex and finely tuned process essential for smooth and purposeful movements like flexion, extension, adduction, abduction, and rotation. The human body orchestrates the actions of various muscles working in concert, each with a specific role. Four functional types describe how muscles work together: agonist, antagonist, synergist, and fixator.
Agonists
Agonist muscles, often called prime movers, are the primary muscles responsible for producing a specific movement.
Mechanical Systems01:22

Mechanical Systems

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 described...
Hydraulic Jump01:29

Hydraulic Jump

A hydraulic jump is a sudden rise in fluid depth in open channels, occurring when high-velocity (supercritical) flow transitions to low-velocity (subcritical) flow. This phenomenon requires an upstream Froude number greater than 1, as flows with Fr1<1 remain subcritical, making a hydraulic jump impossible due to the need for negative head loss, which violates thermodynamic principles.The characteristics of a hydraulic jump depend on the upstream Froude number and are classified as...

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Bioinspired Soft Robot with Incorporated Microelectrodes
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一个灵感来自弹尾的多式联动步行跳跃微型机器人.

Francisco Ramirez Serrano1, Nak-Seung Patrick Hyun1, Emma Steinhardt1

  • 1Harvard Microrobotics Laboratory, Harvard University, Cambridge, MA, USA.

Science robotics
|February 26, 2025
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概括
此摘要是机器生成的。

这项研究引入了一种新的跳跃机制,用于厘米尺度机器人,灵感来自节肢动物. 这种生物灵感机器人实现了令人印象深刻的跳跃,克服了障碍物并提高了机器人的移动性.

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科学领域:

  • 机器人技术 机器人技术 机器人技术
  • 生物启发工程 生物启发工程
  • 生物力学 生物力学

背景情况:

  • 随着尺寸的减少,有腿的机器人面临着障碍物导航的挑战.
  • 小关节动物通过强大的跳跃克服障碍,超越肌肉限制.

研究的目的:

  • 在一个厘米尺寸的机器人中整合冲动跳跃和非冲动腿部运动.
  • 探索生物灵感机制,以提高机器人移动性和跨越障碍物的能力.

主要方法:

  • 开发了一种生物灵感的附属物,具有并行连接和形状记忆合金执行器,用于释放能量.
  • 包含一个被动驱动的弹性链,用于控制地面接触和跳跃.
  • 利用高速视频分析和动态模型进行设计优化.

主要成果:

  • 这台2.2克的机器人实现了1.4米 (23体长) 的最大水平跳跃.
  • 跳跃的动态非常接近弹尾的动态.
  • 该机制被集成到一个四足的微型机器人中,使得可重复的定向起飞和降落成为可能.

结论:

  • 生物启发的跳跃机制显著提高了小型机器人的障碍物扩展能力.
  • 这项研究提供了对跳机械学的洞察力,并为未来的机器人设计提供了信息.
  • 集成平台展示了在具有挑战性的地形中进行复杂机动的潜力.