摘要
线圈通电之后可以产生电磁力,电磁力可以对一般钢质小球产生一定方向的力。根据电磁力与小球重力平衡关系建立相应的数学关系。利用拉普拉斯变换分析小球悬浮的数学模型,通过根轨迹分析法判定小球系统不具有自稳定性。利用PD超前补偿控制方法来补偿磁悬浮小球控制系统的滞后性,使系统传递函数构成闭环反馈控制系统,使其具有稳定性。运用高精度运算放大器搭建简易实用的控制电路,最终实现小球的悬浮。
For the coil going through the current , the magnetic force of the coil will be generated .In this paper , the magnetic force is used to balance the ball＆#39;s gravity.Based on this theory , it builds the math mode of magnetic suspension ball system .Using Laplace transform function and the root loci methods , it analyzes the magnetic sus-pension ball system , announces the self -balance characteristics .Based on a PD controller , it develops the sys-tem to transfer function turn into a closed -loop system , and ensures the system balance immediately .The sys-tem consists of picking resistors capacitors and operational amplifier , realizes to suspend the ball finally .
出处
《机械设计与制造工程》
2015年第1期54-56,共3页
Machine Design and Manufacturing Engineering
