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有源磁悬浮系统在高过载条件下的工作状态,是影响三浮陀螺和平台系统使用精度的关键因素。针对此问题,分析磁悬浮系统加力的作用机理,对系统的力学模型进行研究。从刚体动力学基本方程出发,以三浮陀螺浮子组件为研究对象,建立了浮子5个受控自由度的动力学关系和浮子运动的状态方程。然后对瞬时冲击力、阶跃常值力和简谐变化力作用下浮子运动规律的进行了分析和计算。仿真结果表明,当三种过载同时作用在浮子上时,磁悬浮系统在闭环状态下浮子位移的稳态值为2.12?m,即浮子最终停在线性区的边缘,不会碰到轴尖,因此不会影响仪表的精度和可靠性。但由于加力的刚度比较小,系统的过渡时间比较长。
The active state of the active magnetic levitation system under high overload conditions is the key factor that affects the precision of the three-floating top and platform system. In response to this problem, the mechanism of the force application of the maglev system is analyzed, and the mechanical model of the system is studied. Based on the basic equations of rigid body dynamics, the dynamics of five controlled degrees of freedom of the float and the equation of state of the float movement are established by taking the three-floating top as the research object. Then, the laws of the movement of the buoy under the instantaneous impact force, the step-by-step force and the harmonic harmonic force are analyzed and calculated. The simulation results show that when the three overloads act on the float at the same time, the steady-state value of the float displacement in the closed-loop system of magnetic levitation system is 2.12 μm, that is, the float finally stops at the edge of the linear region and does not touch the shaft tip Will not affect the accuracy and reliability of the instrument. However, due to the stiffer afterburner, the transition time of the system is relatively long.