CAJ | 학술논문

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。
선권통전지후가이산생전자력，전자력가이대일반강질소구산생일정방향적력。근거전자력여소구중력평형관계건립상응적수학관계。이용랍보랍사변환분석소구현부적수학모형，통과근궤적분석법판정소구계통불구유자은정성。이용PD 초전보상공제방법래보상자현부소구공제계통적체후성，사계통전체함수구성폐배반궤공제계통，사기구유은정성。운용고정도운산방대기탑건간역실용적공제전로，최종실현소구적현부。
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'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 .