In linear theory there is no difference between Eulerian and Lagrangian descriptions. 在线性理论中，欧勒描述和拉格朗日描述之间是没什么不同的。
The usual design of the magnetic controller always linearizes around the balance point and bases on the linear system theory to design the linear controller. 磁悬浮轴承的控制器设计通常是在平衡点附近进行线性化，按照线性理论设计线性控制器。
