PCI Express

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(The development of vector control of permanent magnet synchronous motor is analyzed. Then, from the perspective of electromechanical energy conversion, the principle of electromechanical energy conversion of three-phase permanent magnet synchronous motor is explained, and the Lagrangian motion equation is derived. In addition, the mathematical model of the permanent magnet synchronous motor in the three-phase stationary coordinate system and the dq coordinate system is written. Based on Simulink, the simulation model of the speed and current double closed-loop vector control system is established. The simulation results are analyzed to verify the superiority of the performance of the permanent magnet synchronous motor vector control system.)

说明：  变分模态分解的整体框架是变分问题，使得每个模态的估计带宽之和最小，其中假设每个“模态”是具有不同中心频率的有限带宽，为解决这一变分问题，采用了交替方向乘子法，不断更新各模态及其中心频率，逐步将各模态解调到相应的基频带，最终各个模态即相应的中心频率被一同提取出来(The whole framework of variational mode decomposition is variational problem, which makes the sum of the estimated bandwidth of each mode minimum. It is assumed that each "mode" is a finite bandwidth with different center frequencies. To solve this variational problem, the alternating direction multiplier method is used to update each mode and its center frequency continuously, demodulate each mode to the corresponding fundamental frequency band step by step, and finally each mode is called the first mode The corresponding center frequencies are extracted together)

GM (1,1) modified for Predictions. This is helpful in forecasting of non linear data.

说明：  一架飞机在海上失事，搜救人员打捞出了该机的黑匣子，技术人员从其中的内存里恢复了一段声音plane.wav，经推断该声音是失事之前最后时刻的数据，设备供应商证实该声音是通过频分复用生成后准备发送出去的，复用的其中一路信号可能含有驾驶员最后发出的指令，现在要求对该声音进行分析，并恢复可能存在的指令，同时能够利用平台实时播放提取的信号。 内含matlab和CCS两份代码(A plane crashed at sea, search and rescue personnel salvaged the black box of the plane, the technician recovered a piece of sound plane.wav from its memory, and it was inferred that the sound was data at the last moment before the crash, and the equipment supplier confirmed the sound It is prepared to be sent out after being generated by frequency division multiplexing. One of the multiplexed signals may contain the last command issued by the driver. Now it is required to analyze the sound and restore the possible instructions. At the same time, the extracted signals can be played in real time using the platform.)

类的测试程序告诉初学者如何更好的建立工程-kind of testing procedures tell beginners how to build a better project

GP-Pro EX 4.08 Serial Key Code.txt

一本很好的有限元分析的书籍，可以帮助土建类专业初学者更好的理解有限元，并学会用matlab编程(A good book of finite element analysis can help beginners of civil engineering to understand finite element better and learn to program with matlab)

实现文件下载,文件夹下载，可以通过代码修改实现图片，pdf,压缩包文件的下载(File download, folder download, you can modify the code to achieve image, PDF, compressed package file download)

说明：  5432-mcu屏驱动,BOE玻璃，库存玻璃，库存IC 已经在记录仪验证(5432-mcu lcd driver)

通过AVR 单片机的硬件IIC对HMC5883进行读写(use avr mcu hardware iic to read write hmc58883)