单点悬浮控制是各类悬浮技术的基本单元，但磁悬浮系统属于典型的开环不稳定系统，具有较强的非线性，因此克服系统的非线性，增强系统的稳定性很重要，本文以单点悬浮系统为对象，引用了串级控制思想，采用PID控制算法，使用了位置-电流双闭环控制器，并通过仿真和实验验证。 首先，简化单点悬浮系统，并根据理论知识写出了系统的动力学和电磁力方程，进行数学建模，并对其线性化。提高系统的精度与稳定性，采用电流-位置双环控制器，电流内环采用PI控制，位置外环采用PID控制。然后进行仿真分析电流环与位置环在系统中的作用。最后说明悬浮系统软件部分的原理并通过悬浮平台进行实验，测量出悬浮系统中，悬浮间隙与电流电压之间的关系。翻译成英文

Single-point suspension control is the basic unit of various suspension technologies. However, magnetic suspension systems are typical open-loop unstable systems with strong nonlinearity. Therefore, it is important to overcome the system's nonlinearity and enhance its stability. This article takes the single-point suspension system as the object and adopts the cascade control idea, utilizing the PID control algorithm and a position-current dual-closed-loop controller, which is verified through simulations and experiments. Firstly, the single-point suspension system is simplified, and the system's dynamics and electromagnetic force equations are written based on theoretical knowledge for mathematical modeling and linearization. To improve the system's accuracy and stability, a current-position dual-loop controller is used, with the current inner loop adopting PI control and the position outer loop adopting PID control. Then, the simulation analyzes the roles of the current and position loops in the system. Finally, the principle of the suspension system's software part is explained, and the relationship between suspension gap and current voltage in the suspension system is measured through experiments on the suspension platform.