摘要:洛伦兹电机是一种以洛仑兹力驱动的电磁作动器,具有结构简单、体积小、响应快、推力线性度好等特性,在精密主动减振器中具有广阔的应用前景。本文对被动减振器和主动减振器进行了动力学分析。确立了作动器在主动减振系统中绝对阻尼力的技术方案,针对减振系统运行中的质心偏移问题,提出了基于直线电机作动器的质心偏移测量技术和减振系统的质心补偿技术。为了验证音圈电机及其驱动的有效性,对被动减振系统和主动减振系统进行了时域和频域的实验对比测试,并获取实际测量的主动减振系统的与被动减振系统的减振效果曲线,验证了主动减振优于被动减振的分析与设计。 关键词:减振平台;主动减振;阻尼;洛伦兹电机;作动器;质心补偿 Abstract: The Lorentz Motor (LM), an electromagnetic actuator driven by Lorentz force, can be applied widely in precise active isolators, with simple structure, small size, low noise, fast response time, good currentthrust linearity, and so on.. In this paper, the dynamic models of active and passive isolators were analyzed, respectively. The absolute damping arrangement of actuator in the active isolator was established based on the dynamic analysis. The actuators used in vibration isolation platform were applied to measure the centroid of the platform. The centroid compensation technology was proposed to compensate the centroid shift of vibration isolation system. Tests about active and passive isolators were performed, and the results show that the system of active isolator has obvious advantages. Key words: vibration isolation platform; active vibration isolation; damping; Lorentz motor; actuator; centroid compensation
|