boilerdigital

A New Algorithm for ARMA Model Parameter Estimation Using Group Method of Data Handling

Análisis de Componentes Principales en Matlab

autocov computes the autocovariance between two column vectors X and Y with same length N using the Fast Fourier Transform algorithm from 0 to N-2. The resulting autocovariance column vector acv is given by the formula: acv(p,1) = 1/(N-p) * sum_{i=1}^{N}(X_{i} - X_bar) * (Y_{i+p} - Y_bar) where X_bar and Y_bar are the mean estimates: X_bar = 1/N * sum_{i=1}^{N} X_{i} Y_bar = 1/N * sum_{i=1}^{N} Y_{i} It satisfies the following identities: 1. variance consistency: if acv = autocov(X,X), then acv(1,1) = var(X) 2. covariance consistence: if acv = autocov(X,Y), then acv(1,1) = cov(X,Y)

捷联惯导数据计算的详细功能、包含内容说明，原始代码。(Detailed features SINS computing, including the content description, source code is in these two a)

采用最小二乘法进行参数辨识，模型为三阶模型。(Using the least squares method to identify the parameters, the model for the third-order model.)

单一频率的正弦相关法动态测试系统的测试方法简单，不需要对系统进行辨识。只需要观察被测系统输出信号的相差和幅值变化。通过扫频的方法测量在不同的频率点下的幅值和相位变化。在工程应用中，只需要知道被测系统的相位变化在正常的范围内就可以视系统的动态性能正常。该仿真算法只是建立了一个模型。在实际运用时还需要变换测试信号的频率和周期。(A single frequency sinusoidal correlation method of testing dynamic testing system is simple, does not require system identification. Only need to observe the difference between the measured system output signal and amplitude change. Swept through the method of measurement points at different frequencies under the amplitude and phase changes. In engineering applications, only need to know the system under test changes in the normal phase it may be possible within the framework of the dynamic performance of the system to normal. The simulation algorithm is the establishment of a model. In the practical application of test signals also needed to change the frequency and periodicity.)

说明：  利用matlab实现已知电势分布情况下，周围电磁场的分布情况。(achieved using Matlab known potential distribution circumstances surrounding the distribution of the electromagnetic field.)

交织源程序，卷积交织，分块交织，级联交织等(Interwoven source code, convolutional interleaving, block intertwined, interwoven cascade)

bpsk的调制与解调的过程，并采用卷积码，讨论其误码性能随着其功率、频偏、相偏而变化.(bpsk modulation and demodulation process and using convolutional codes, to discuss its error performance with its power, frequency offset, phase offset changes.)

六相PMSM传统矢量控制系统的仿真模型，其中六相PWM算法模块采用两个三相SPWM算法模块。(Six-phase PMSM traditional vector control system simulation model, in which six-phase PWM algorithm module uses two three-phase SPWM algorithm module.)