洛伦兹力磁悬浮织针驱动器设计与仿真

为解决织针三角驱动中存在摩擦、冲击等问题,并避免引入电磁力非线性影响,设计了一种基于洛伦兹力的磁悬浮织针驱动器。首先提出了驱动原理并推导了数学模型,利用ANSYS软件进行电磁有限元分析;然后设计了执行调节(PID)控制器并在MatLab/Simulink中进行控制系统仿真,最后搭建了实物平台进行实验。结果表明:驱动器工作区域磁场均匀稳定,电磁力满足驱动要求;织针轨迹与预期吻合,仿真误差在±3.5 μm之间;织针可以达到集圈高度,且响应迅速、平稳无振荡,测试误差在±10 μm之间。洛伦兹力磁悬浮织针驱动器可以消除织针运动中摩擦、振动和冲击,并且与磁阻力磁悬浮织针驱动器相比控制系统简单、线性度好,控制精度可达到微米级。

Design and simulation of Lorentz force actuated maglev knitting needle actuator

In order to solve the problems of friction, impact in triangle knitting needle drive, and avoid the nonlinear influence of electromagnetic force, this paper presents a maglev knitting needle actuator based on Lorentz force. Firstly, the driving principle and mathematical model were proposed, and the electromagnetic finite element analysis is carried out with ANSYS; Secondly, the PID controller is designed, and the system control model is built and simulated in MatLab/Simulink; Finally, the physical platform is built for experimental verification. Magnetic field simulation shows that the magnetic field in the working area of the model is uniform and stable, and the electromagnetic force meets the driving requirements. The control system simulation results show that the needle trajectory is consistent with the expected trajectory, and the simulation error is within ±3.5 μm. The experimental results of the physical platform show that the needle can reach the height of tuck, with rapid, stable and no oscillation, and the experimental error is within ±10 μm. Lorentz force actuated maglev knitting needle actuator can eliminate the friction, vibration and impact in the needle movement. Compared with reluctance force actuated knitting needle actuator, the control system is simple, linear and the control precision can reach micron level.