IMC-PID-fractional-order-filter controllers design for integer order systems

One of the reasons of the great success of standard PID controllers is the presence of simple tuning rules, of the automatic tuning feature and of tables that simplify significantly their design. For the fractional order case, some tuning rules have been proposed in the literature. However, they are not general because they are valid only for some model cases. In this paper, a new approach is investigated. The fractional property is not especially imposed by the controller structure but by the closed loop reference model. The resulting controller is fractional but it has a very interesting structure for its implementation. Indeed, the controller can be decomposed into two transfer functions: an integer transfer function which is generally an integer PID controller and a simple fractional filter.     

伺服压力机机械负载模拟系统的设计

搭建了整套伺服控制的软硬件系统。为了对伺服压力机的传动系统设计和控制进行优化,构建了一种用伺服电机模拟机械负载动力学特征,以模拟伺服非线性机械负载动力学特征的伺服压力机负载的模拟实验平台。该实验平台采用前馈与转速跟踪结合实施控制,以伺服电机作为可调控柔性负载等效于各种机械负载下的输出,在实验室环境下实现对于各种机械负载的模拟。由于规避了逆动力学特性的引入,本系统具有比以往测功机更好的动态响应特性。     

Tuning fuzzy PD and PI controllers using reinforcement learning

In this paper, we propose a new auto-tuning fuzzy PD and PI controllers using reinforcement Q-learning (QL) algorithm for SISO (single-input single-output) and TITO (two-input two-output) systems. We first, investigate the design parameters and settings of a typical class of Fuzzy PD (FPD) and Fuzzy PI (FPI) controllers: zero-order Takagi–Sugeno controllers with equidistant triangular membership functions for inputs, equidistant singleton membership functions for output, Larsen’s implication method, and average sum defuzzification method. Secondly, the analytical structures of these typical fuzzy PD and PI controllers are compared to their classical counterpart PD and PI controllers. Finally, the effectiveness of the proposed method is proven through simulation examples.     

采用单片机技术设计CAI通用智能控制器

本文提出了一种将单片机应用于通用智能控制器的硬件设计电路，并详细讨论了该控制器与主机的双向通讯及与被控制对象的硬件连接。     

采用自适应电力系统稳定器提高输电系统稳定性

对电力系统稳定器的设计方法、性能特点作了讨论。仿真实验表明,高阶、非线性输电系统可用低阶、线性模型来表示,且模型的参数可用最小二乘法来辨识;极点移动的自校正调节器最适合电力系统应用;同传统的PSS相比,自适应电力系统稳定器,提供了更好的阻尼。提出解决干扰出现后辨识器参数不能收敛问题的一种新方法:首先模拟各种可能出现的大干扰,辨识出系统在这些状态下的参数值并存于计算机中;系统一旦出现大干扰时,可借助继电保护信号迅速地判断干扰的类型,然后将相应的参数值调出,设计控制器,计算控制作用。仿真结果表明,这种措施能保证系统在出现大干扰的情况下,具有良好的动态响应。     

Application of selftuning regulator algorithm to generating unit controllers

The processing capability of computers makes it feasible to implement sophisticated techniques for process control. However, to minimize the software development costs, it is desirable to develop algorithms that can have a wider application. In keeping with this, an AVR and speed governor for a generating unit have been designed using the same algorithm, called the selftuning regulator. The selftuning AVR and speed governor have been implemented using a microprocessor and a minicomputer online. The feasibility of developing unified algorithms is demonstrated by means of realtime tests, in which the two controllers are used simultaneously for a generating unit physical model.     

基于PCS 7的多PLC之间的程序同步和协作

本文以啤酒厂PCS7-300/400PLC自动控制系统为例说明西门子PCS7系统中多PLC控制器中程序之间相互协调、相互通信、相互同步的实现方法。     

一种应用数字实时控制的直流无刷电机系统的设计

介绍了一种基于DSP(数字信号处理器) FPGA(现场可编程门阵列)的直流无刷电机控制系统.阐述了通过FPGA对PWM波进行组合逻辑变换的设计方法.详细介绍了采用单神经元自适应PSD控制器对电流环进行调节的方法,使电机能稳定工作在变负载条件下.试验结果表明,系统的硬件和软件设计合理,具有良好的的调速性能.     

Application of an explicit min-max MPC to a scaled laboratory process

Min-max model predictive control (MMMPC) requires the on-line solution of a min-max problem, which can be computationally demanding. The piecewise affine nature of MMMPC has been proved for linear systems with quadratic performance criterion. This paper shows how to move most computations off-line obtaining the explicit form of this control law by means of a heuristic algorithm. These results are illustrated with an application to a scaled laboratory process with dynamics fast enough to preclude the use of numerical solvers.     

基于dSPACE的大型风电机组系统控制器测试平台的研制

为了解决大型风电机组系统控制器的试验室闭环测试问题，利用硬件在环实时仿真技术，研制了基于dSPACE的全数字化测试平台。以一台1．5MW变速变桨双馈风电机组的控制为例，介绍了硬件在环测试平台的搭建过程。试验结果表明，开发的测试平台能够对系统控制器的起停运转、各种运行状态的控制和切换以及故障保护等功能进行有效的测试。