基于环形交叉耦合结构的多电机比例同步控制

针对多电机同步控制,国内外学者提出了多种算法和策略,但是这些策略对需要转速成一定比例的情况具有一定的局限性。文中在相邻交叉耦合控制策略和环形耦合控制策略的基础上,对比例同步系统相邻耦合误差的数学模型进行变换,将系统转化为近似同步系统,考虑系统各轴同步系数,结合传统交叉耦合控制结构,应用经典控制理论设计跟踪误差控制器和同步误差控制器。同时,针对系统可能出现的不确定性,文中设计了一种参数自整定模糊PID控制器。最后文章应用Matlab/Simulink对环形交叉耦合结构进行了计算机仿真,仿真结果表明,该环形交叉耦合结构模糊PID控制算法收敛速度快、稳定性能好,能很好的实现多电机比例协同控制。     

基于DSP和CAN总线多轴电机控制系统

现代工业系统的高度复杂,多个伺服电机的联动控制得到了广泛的需求。针对多电机在运动中难以保持同步的问题,设计并实现了基于DSP和CAN总线的多轴电机控制系统。该系统选择TMS320F28335作为运动控制器的核心芯片,通过以太网接口与PC机进行通信,并利用CAN总线对多个伺服驱动器进行同步控制,完成系统硬件的搭建;同时将交叉耦合模糊PID算法引入到系统中,并在MATLAB仿真中实现了该算法。初步完成系统的软硬件设计,仿真结果表明算法的有效性。     

基于神经网络的多电机同步控制

文章通过对多电机同步控制的原理及其特点分析,将神经网络与PID控制相结合,设计一种神经网络PID控制器并用于多电机同步控制中,有效的缓解负载带来的同步误差,实验结果表明,在相同扰动情况下,该方法能更好的使多电机以一定速度同步运行。     

多电机变频调速协同智能控制系统的研究

在现代工业生产中,由多个电动机驱动的机械系统相当多,而且要求各电机之间保持一定的同步关系,以保证系统的动、静态性能要求。采用基于自适应模糊PID控制器的同步控制策略,很好地解决了多电机传动系统的速度同步问题,实现了多电机传动系统的速度同步、转矩平衡。     

永磁同步直线电机智能化PID速度控制研究

永磁同步直线电机是一个复杂的强耦合非线性系统,传统PID控制无法满足高性能直线电机控制系统的要求。在分析永磁同步直线电机d、q轴数学模型的基础上,采用遗传算法对模糊控制进行优化;针对模糊控制单一论域条件下无法实现全局最优控制,引入变论域控制思想,设计了一种智能化PID速度控制器。通过仿真结果表明,基于遗传算法的变论域模糊PID速度控制器能够使永磁同步直线电机获得更优良的控制效果。     

高压断路器三相永磁无刷直流电机机构控制算法研究

针对高压断路器三相永磁无刷直流电机机构,研究了不同控制策略下电机操动机构的运动特性.考虑高压断路器的分、合闸操作过程,建立了永磁无刷直流电机操动机构运动控制系统的仿真模型,采用数字式双闲环控制,内环为电流环,采用PI控制,外环为速度环,基于传统PID控制器、单神经元PID控制两种不同控制策略控制.通过对伺服控制系统的仿真分析得到了电机操动机构速度跟踪控制特性.结果表明,单神经元PID控制器能够较好的实现触头速度的跟踪控制,使其按理想运动特性曲线运动,是一种较理想、有效的控制方法.     

PID-模糊控制在多电机同步传动系统中的应用

针对开松上胶机（AF2）的多电机同步系统的复杂机械控制结构，本文提出了一种新型采用PID-模糊复合控制算法的电机同步控制系统。分析了系统的组成和多电机同步控制原理。介绍了PID-模糊控制器的设计。实践证明，该系统动态响应快、实时性能好、具有较高的同步精度和鲁棒性，取得了良好的控制效果。     

基于EtherCAT现场总线的物料传输控制系统

基于EtherCAT现场总线的运动控制器,设计了一种物料传输多轴运动控制系统,采用经典的PID运动控制算法和模糊自适应PID控制算法,实现了物料的高精度传输和交换。     

直流电机控制方法的Matlab仿真研究

针对无刷直流电机的控制方法进行了深入研究。根据无刷直流电机实际物理模型建立相应的数学模型,电机使用双闭环进行控制。根据电机的实际工作特点,使用模糊自适应PID算法替代常规PID算法建立速度控制模型,以提高无刷直流电机速度控制系统的稳定性和抗干扰能力。使用Matlab/Simulink工具箱建立无刷直流电机的仿真模型,研究结果表明,模糊自适应PID算法能够使无刷直流电机的速度更加平稳,在载荷扰动下快速恢复设定速度,使得控制系统具有更好的鲁棒性。     

基于神经网络的列车自动驾驶控制算法研究

对列车自动驾驶系统的速度控制过程进行了分析,针对传统PID算法缺乏自适应能力的缺点,在传统神经网络算法的基础之上对神经元的学习算法作出改进,设计出了基于RBF网络辨识的单神经元自适应PID控制器,仿真结果表明该控制器能够满足列车自动驾驶系统速度控制要求。     

Injection-coupled synchronous logic

A novel injector structure used in conjunction with an I/SUP 2/L gate is proposed and its application to the design of current comparators and synchronous logic is described. The operation and fabrication of basic gates as well as current comparators, SR and T flip-flops are discussed. The new gate structures exhibit similar power/spl times/delay products, but lead to a considerable increase in functional density when compared to standard I/SUP 2/L in synchronous logic applications.     

A new driving scheme for synchronous rectifiers: single windingself-driven synchronous rectification

Single winding self-driven synchronous rectification (SWSDSR) approach is a new driving circuit that overcomes the limitations of the traditional driving schemes, becoming an interesting alternative to supply new electronic loads such as microprocessors. Traditional self-driven synchronous rectification (SDSR) technique has shown very good performance to improve efficiency and thermal management in low-voltage low-power DC/DC converters, however it can not be extended to the new fast dynamic, very low voltage applications. SWSDSR scheme is based on an additional winding in the power transformer (auxiliary winding). It allows for maintaining the synchronous rectifiers (SRs,) on even when the voltage in the transformer is zero, which is impossible to do in traditional self-driven approaches. It also makes it possible to drive properly the SRs even in very low voltage applications, 1.5 V or less. Coupling of the windings strongly affects the performance of the SWSDSR technique. The influence of the coupling between the different windings is analyzed through simulations of different transformers designed for the same application. Models of transformers are generated with a finite element analysis (FEA) tool. Goodness of the SWSDSR scheme is validated through experimental results     

Coherent phase-locked synchronous oscillator

A coherent phase-locked synchronous oscillator (CPSO) is a coherent synchronisation and tracking network developed using a synchronous oscillator and a feedback network, external to the synchronous oscillator (SO). It is a unique network whose noise bandwidth is fully independent of its tracking range and has absolute coherency throughout the tracking range. It has several orders of magnitude wider tracking range for a given input signal/noise ratio than any other tracking network.     

A line-voltage-sensorless synchronous rectifier

A line-voltage-sensorless control for three-phase pulsewidth-modulated (PWM) synchronous rectifiers is presented. A line synchronization and unity power factor control are described. Indirect synchronization without sensing the line voltage allows a standard vector-controlled inverter to be used as a synchronous rectifier without requiring any additional hardware. Furthermore, the line synchronization can be properly operated under line voltage distortion or notching and line frequency variation. All control functions are implemented with a single-chip microcontroller. It is shown via experimental results that the proposed controller gives good performance for the synchronous rectifier     

多路视频同步播放控制的实现

目前所采用的视频处理软件不能满足试飞工程师试飞数据分析处理的专用需求,面临现有商业软件所存在的众多局限性,采用解码库和时间戳同步等方法通过VC编程解决了多种视频音频格式解码、多路视频时间精确同步等关键技术。经过试飞工程师实际使用验证表明,该软件满足试飞视频数据分析处理所需的时间同步、精确定位等专用需求,本文详细介绍了该软件的结构和各功能模块,并讨论了软件的具体实现、技术创新点及软件实现的关键技术。     

Implementing a flexible synchronous network

The SYNET project, undertaken by Deutsche Telekom to modernize its transmission network, is discussed. The SYNET technology is based on the synchronous digital hierarchy (SDH), which uses synchronous transport modules of 155 Mbit/s (STM-1). The latter include a maximum usable bit rate of about 50 Mbit/s as well as a variety of additional information intended for network management. Since the transmission network is divided into several network levels characterized by different traffic loads and structures, a range of synchronous components geared to the requirements of the different network levels have been developed. The major differences between the trunk network and the local networks are described. The implementation of SYNET is reviewed     

Nozzle-shaped antenna for synchronous satellite

For synchronous satellites a new type of antenna formed around the apogee motor nozzle and operating simultaneously at 40 and 360 MHz has been designed. The antenna is fed through a circular gap by two tuned back cavities. The antenna feasibility has been demonstrated by measurements on a scaled model.