PLC-analog

摘要 随着火电机组向大容量、高参数和高效率方向发展，对机组热工自动控制系统控制品质的要求也随之提高。在热工过程中，大多数热工对象具有较大的惯性和迟延，且是非线性和慢时变的，部分对象还是多变量的，因而具有很大的不确定性和强耦合性。这就难以建立精确的数学模型，使采用固定参数的PID控制器不能与生产上越来越高的控制要求相适应。 本文主要是研究动态矩阵控制算法在主汽温控制方面的应用。首先，分析了当前火电厂主汽温的控制方式和常规的控制方法，以及影响主汽温变化的各种扰动因素；然后，介绍了动态矩阵控制算法的原理，并基于此原理设计了DMC主汽温控制系统；并且与传统的串级PID控制系统进行了比较，仿真结果表明动态矩阵控制算法的响应速度快，且没有超调，鲁棒性好，控制品质明显优于常规PID控制。 关键词：主汽温；动态矩阵控制；DMC；matlab仿真 (Abstract Developing with the tendency to large capacity, high parameters and high efficiency of fossil-fired unit, the control trait request for thermodynamic automatic control systems is heightened .In thermodynamic process, most thermodynamic objects have large inertia and delay, and are nonlinear and time-variable furthermore, some of them are multi-variable, and also has large uncertainty and strong coupling. This makes it difficult to construct accurate mathematic models, and makes PID controllers with fixed parameters hardly adapted to higher and higher control request in production This article is mainly the research of the application of dynamic matrix control in the main temperature control system. First, it analyzed the conventional control method in the current thermoelectric power station steam system, and the affects of every kind of perturbation factor in the main temperature control system. Then it introduced the principle of dynamic matrix control algorithm, and desi)

叶片元素计算法 基于叶素-动量理论（BEM）. 采用叶素-动量理论可以计算风轮旋转面中的轴向诱导。 风力发电用(BEM method for calculate the blade drage and lift force.)

4 files are included in the package: (1) fs01.m - the 1st-order local linear approximation (LLA) very similar to algorithm by Farmer and Sidorowich (1987). Uses constrained linear least squares (lsqlin) and (2) ts1.m - to reconstruct the vectors of the state space. (3) Example.m - runs fs01 and ts1 to predict (4) composite.txt - synthetic time series of decadal average sunspot number (4 files are included in the package: (1) fs01.m- the 1st-order local linear approximation (LLA) very similar to algorithm by Farmer and Sidorowich (1987). Uses constrained linear least squares (lsqlin) and (2) ts1.m- to reconstruct the vectors of the state space. (3) Example.m- runs fs01 and ts1 to predict (4) composite.txt- synthetic time series of decadal average sunspot number )

这是一篇很好的关于风力发电的资料，希望对大家有所帮组。(good material)

calculate ccdf of papr of ofdm

computes likelihood for ARIMA model

MIMO-OFDM的多信道同步技术仿真，多发送和多接收部分。(MIMO-OFDM simulation of multi-channel synchronization, multi-transmit and multiple receive section.)

这一段源代码为瑞利衰落信道的实现，代码比较简单，适合初学者学习(This section of the source code for the realization of Rayleigh fading channel, the code is relatively simple, suitable for beginners to learn)

说明：  光伏并网逆变器，阳光电源，测试部设计,有待修改 (pv grid inverter,sungrow,test dept desigen)

利用旋转不变方法对信号的波达方向进行估计，主要用于窄带信号(DOA estimation by ESPRIT)