LFM_comp_w

求解线接触弾流润滑中的压力与膜厚分布，包括雷诺方程、膜厚方程。变性方程、粘压方程以及密压方程的求解。(Solution of pressure and film thickness distribution in line contact lubrication)

三个ANSYS瞬态分析的命令流：冲击载荷作用悬臂梁的阻尼振动分析；破碎锤的瞬态动力学分析；滑动摩擦接触分析(Three command streams of ANSYS transient analysis: damped vibration analysis of cantilever beam under impact load; transient dynamic analysis of crushing hammer; sliding friction contact analysis)

三相永磁同步电机的滞环电流控制仿真模型，控制瞬态电流输出。(Simulation Model of hysteresis current Control for Three-phase permanent Magnet synchronous Motor)

蠕滑力计算,滚珠轴承中蠕滑力计算时用到，修改后也可以用到滚珠丝杠中(fastsim function F=Get_Fastsim(C,Cp,ab,N))

一种虚拟同步发电机仿真模型，通过投切负荷达到频率波动的效果，然后VSG根据控制策略改变输出。(A virtual synchronous generator simulation model achieves the effect of frequency fluctuation by switching loads, and then VSG changes the output according to the control strategy.)

说明：  丹麦大学研究建立的风力发电机模型，2MW风机，包括叶轮、齿轮箱、发电机等风机系统仿真模型。(The wind turbine model established by the University of Denmark, 2MW wind turbine, including impeller, gearbox, generator and other complete simulation models.)

说明：  直流电机双闭环系统，实现转速和电流的反馈，根据给定的不同，电动机转速也会不同(DC motor double closed loop system)

abaqus 使用技巧-Inp文件中单元类型改变时，一定要注意，划分网格的时候是否，选用了一种望各类型，比如4变形和3变形的区别，如果用注意将所有的单元类型都做相应的修改。这说明单元类型由2个因素决定，1网格形状，2计算任务.(Abaqus tips-When changing the unit type in the Inp file, be sure to pay attention to whether or not to select a type, such as 4 deformation and 3 deformation, if you use the attention, all the unit types should be modified accordingly. This shows that the unit type is determined by two factors, 1 grid shape, 2 calculation tasks.)

说明：  计算可见光通信中最大化最小速率的优化问题，还有稳健波束成形(The optimization problem of maximizing the minimum rate and robust beamforming are also discussed)

本文首先分析了永磁同步电机矢量控制的发展概况，然后从机电能量转换的角度出发，解释三相永磁同步电机的机电能量转换原理，推导拉格朗日运动方程。此外，列写出永磁同步电机在三相静止坐标系和dq坐标系下的数学模型。基于Simulink建立了转速电流双闭环矢量控制系统的仿真模型，通过对仿真结果分析，验证了永磁同步电机矢量控制系统性能的优越性。(This paper first analyzes the development of permanent magnet synchronous motor vector control, and then explains the electromechanical energy conversion principle of three-phase permanent magnet synchronous motor from the perspective of electromechanical energy conversion, and deduce the Lagrange motion equation. In addition, the mathematical model of permanent magnet synchronous motor (PMSM) in three phase stationary coordinate system and dq coordinate system is listed. Based on Simulink, a simulation model of speed and current double closed loop vector control system is established. By analyzing the simulation results, the performance of PMSM vector control system is verified.)