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相关概念视频

Mechanical Systems01:22

Mechanical Systems

171
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...
171

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开发用于自由空间光通信系统的压电惯性旋转电机.

Laurynas Šišovas1, Andrius Čeponis2, Dalius Mažeika3

  • 1Department of Aeronautical Engineering, Antanas Gustaitis' Aviation Institute, Vilnius Gediminas Technical University, LT-10223 Vilnius, Lithuania.

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概括

一个新的用于太空应用的压电惯性电机可靠地在低地球轨道温度下运行. 它的设计确保了在广泛的温度范围内稳定的性能,非常适合精确的卫星任务.

关键词:
角运动的角度运动.惯性压电电机 惯性压电机在低地球轨道上运行.空间空间空间空间空间的空间.

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科学领域:

  • 工程 工程师 工程师 工程师
  • 材料科学 材料科学 材料科学
  • 航空航天工程 航空航天工程

背景情况:

  • 太空船需要紧,轻量级,可靠的执行器来执行精确的任务.
  • 现有的执行器在低地球轨道 (LEO) 中常见的极端温度变化下可能面临性能恶化.

研究的目的:

  • 设计,开发和研究一种用于LEO温度条件的新型压电惯性电机.
  • 为了评估电机的性能和稳定性在-20°C至40°C的温度范围内.

主要方法:

  • 利用了由压电双形板的第一个曲模式驱动的惯性棒滑原理.
  • 进行数值模拟和实验调查,以评估机械和机电性能.
  • 在-20°C至40°C的温度范围内测试电机性能.

主要成果:

  • 电机在测试温度范围内表现出稳定的运行,共振频率偏差为170Hz.
  • 随着温度的升高,位移幅度从12.61μm增加到13.31μm,这表明机械反应得到了增强.
  • 实现了 1200 RPM 的最大角速度和 13.1 N·mm 的失速扭矩.

结论:

  • 开发的压电惯性电机在不同的LEO温度条件下是紧的,轻的,稳定的.
  • 其强大的性能使其适用于需要精确定位的小型卫星应用,例如卫星定位和自由空间光通信.