通向定制控制的阶梯

终于，你仅用简单的几步就可以定制好ActiveX控制了——你所需要的只是Delphi 3.0。

用于某种工业场合的定制控制器的设计与实现

文章描述了一种能在某些特定场合代替上位机对交流伺服器进行控制的定制控制器的设计与实现;控制器只用1片CPLD做主控芯片,无需单片机和外部存储器,外围电路设计简单;利用CPLD内部FLASH进行参数配置与存储,使其能较灵活地适应某些工业场合的要求。该控制器的特点是成本低,结构简单,实时性强,具备一定的实用性。

基于可定制微控制器的光栅检测片上系统

新型器件可定制微控制器ZE5内部集成了加速的8051和FPGA,利用一片ZE5实现了光栅数显表的细分辨向、计数、数据处理、人机接口等全部功能的集成,构成嵌入式光栅检测片上系统,利用硬件描述语言Verilog和C语言相结合完成了系统的硬软件设计,并利用Fastchip开发平台进行了系统的调试,给出了调试的过程和仿真波形,该系统具有全数字、可定制、高集成、体积小、速度快等特点。

基于LabVIEW的多种类型控制器集成通信模式设计与开发

介绍了一种面向多种类型控制器的通信模式设计与开发方法,能够实现主流品牌控制设备与定制开发控制设备之间的数据交互,从而满足船舶机舱监控需求。该方法采用Lab VIEW作为系统层监控应用软件,基于OPC技术实现Lab VIEW与主流品牌控制器之间的数据通信,利用Lab VIEW的串口设计功能实现与定制控制器之间的串口通信,从而实现整个系统的数据交互。应用KEPServer软件构建通用OPC服务器和VSPD软件进行串口通信仿真开发调试,能够进一步降低成本、提高效率。

新一代OMNIDRIVE（总体驱动／全面驱动）控制软件

BSS AUDIO推出了针对于OMNIDRIVE FDS-366的新一代专业标准扬声器管理系统控制软件——SB2。

灰色神经网络仿真及其在MCMQC中的应用

为了解决大规模定制生产质量控制中质量数据缺乏的灰色不确定性问题,将灰色理论引入到了神经网络建模中。以灰色理论的核心思想(信息递阶、时变和多维特性)为基础,构造了基于灰色体系的建模方法,并对其进行了简化,给出了经过简化的一般性建模方法——横向、纵向和混合建模法,并将其与神经网络建模相结合。以一个典型的灰色BP神经网络为例,以横向建模方式对其进行了实现,并将其应用到大规模定制生产过程质量控制(MCMQC)中。仿真实验结果表明,灰色神经网络解决大规模定制生产质量控制中的灰色不确定问题是有效可行的。

Simulation Study on Active Roll Control of Vehicles

The effects of active control on the vehicle roll were studied. Based on the theory that distributing the greater roll stiffness to the rear axle can improve tracking trajectory capacity and increase maneuver stability, an eight degrees of freedom vehicle model was established and feedforward feedback control strategy was devised to control distribution of lateral load transfer on the front axle and the rear one. Simulation results showed that the proposed control strategy can improve comfort, maneuver stability and safety effectively.

Target Seeker Gyro and Controls

A composite target seeker gyro with dual spectral range infrared rays and millimeter waves, and the associated control methodology are developed. The static pressure air floated ball bearing is used to sustain the outer frame, the optical fiber and wave guide are used to transmit these two kinds of signals to the rear part of the gyro, and the stator coils are used to get non contact angular measurement. Composite guiding, scanning, tracing and controlling can be achieved, the maximum tracing angular velocity can be as high as 16(°)/s.

铁路液化石油气槽车自动灌装系统的改造

介绍了中国石化集团股份公司洛阳分公司液化石油气火车槽车自动灌装系统的组成、功能和性能特点,并指出存在的不足,提出改进措施。

LOW COST IMPLEMENTATION OF SPEED SENSORLESS INDUCTION MOTOR CONTROL USING STATOR FLUX ORIENTATION

The control platform of the induction motor （IM） with low costs is developed by using DSP MC56F8013 with a good performance/price rtaio. The control algorithm for the speed sensorless IM is studied based on the stator flux orientation （SFO）. The algorithm structure is simple to be implemented and cannot be influenced by motor parameters, The improved stator flux estimation is used to compensate errors caused by the low pass filter （LPF）. A new speed regulator is designed to ensure the system working with the maximal torque in the transient state. The system simulation and the prototype experiment are made. Results show that the con- trol system has good dynamic and static performance.

DECENTRALIZED ADAPTIVE CONTROL FOR LINEAR TIME INVARIENT SYSTEMS WITH FIRST ORDER INTERCONNECTIONS

A new decentralized adaptive control scheme is presented for linear time invariant systems with first order interconnections. The proposed control scheme with “proportional plus integral” terms is used to improve the convergence rate and the ultimate bound of the tracking error. It is important to note that the adaptive scheme uses lower adaptive gains and smaller control inputs to avoid input saturation and oscillatory behavior. Simulation results are illustrated for controlling a dual inverted pendulum and a multivariable turbofan engine using the proposed adaptive scheme. These simulations validate out conclusions.

生成独文件的Windows程序

一个应用程序总是要由一簇其他程序跟从是不是太有些碍手碍脚了?Versatile Control System公司开发的VEXE 1.0版(＄99),让你把所有与Microsoft Windows 3.1兼容的可执行软件,以及它们的支持软件.VBX(定制控制),.DLL(动态链接库)和.HLP(Windows帮助)文件等统统包装成一个执行文件。这样以来,安装和删除软件都变得容易了,对VBX的版本控制也有所帮助。 用了VEXE,嵌入的VBX就不会在另一个程序安装过程中被不兼容的版本所覆盖。但是,如果某个程序已先把一个VBX载入内存。

Control uncertain continuous－time chaotic dynamical system

The new chaos control method presented in this paper is useful for taking advantage of chaos.Based on sliding mode control theory, this paper provides a switching manifold controlling strategy of chaoticsystem, and also gives a kind of adaptive parameters estimated method to estimate the unknown systems' pa-rameters by which chaotic dynamical system can be synchronized. Taking the Lorenz system as example, and with the help of this controlling strategy, we can synchronize chaotic systems with unknown parameters and different initial conditions.

Study of dynamic stable control for a leg-wheeled robot

In order to realize the dynamic stable motion control for a leg-wheeled robot, this paper presents a layered control architecture. It is composed of three levels, i.e. the supervisor level, coordinator level and leg level. The supervisor level is for the task definition and planning, while the coordinator level does the dynamic stable control and the leg level executes the real-time control command. First, we build the efficient Newton-Euler dynamics equations of the robot. Then, the stability control is realized by properly distributing ground reaction forces applied by the legs. We also use Simplex method to optimize the ground reaction force distribution and verify the control method by experimental and numerical results.

Tuning of fuzzy PID controller for Smith predictor

An analytical tuning method was proposed for fuzzy PID controller used in Smith predictor in order to extend its application and improve its robustness. The fuzzy PID controller was expressed as a sliding mode control. Based on Lyapunov theory, Smith predictor was analyzed in time domain. The parameters of the fuzzy PID controller can be obtained using traditional linear control theory and sliding mode control theory. The simulation experiments were implemented. The simulation results show that the control performance, robustness and stability of the fuzzy PID controller are better than those of the PID controller in Smith predictor.

On Reliability-optimized Controller Placement for Software-Defined Networks

By decoupling control plane and data plane,Software-Defined Networking(SDN) approach simplifies network management and speeds up network innovations.These benefits have led not only to prototypes,but also real SDN deployments.For wide-area SDN deployments,multiple controllers are often required,and the placement of these controllers becomes a particularly important task in the SDN context.This paper studies the problem of placing controllers in SDNs,so as to maximize the reliability of SDN control networks.We present a novel metric,called expected percentage of control path loss,to characterize the reliability of SDN control networks.We formulate the reliability-aware control placement problem,prove its NP-hardness,and examine several placement algorithms that can solve this problem.Through extensive simulations using real topologies,we show how the number of controllers and their placement influence the reliability of SDN control networks.Besides,we also found that,through strategic controller placement,the reliability of SDN control networks can be significantly improved without introducing unacceptable switch-to-controller latencies.

Model Predictive Controller Design for the Dynamic Positioning System of a Semi-submersible Platform

This paper researches how to apply the advanced control technology of model predictive control （MPC） to the design of the dynamic positioning system （DPS） of a semi-submersible platform. First, a linear low-frequency motion model with three degrees of freedom was established in the context of a semi-submersible platform. Second, a model predictive controller was designed based on a model which took the constraints of the system into account. Third, simulation was carried out to demonstrate the feasibility of the controller. The results show that the model predictive controller has good performance and good at dealing with the constraints or the system.

Electricity Pricing Policy Should Serve Macro-Economic Control

The National Development and Reform Commission beefed up its efforts to promote the work of electricity price reform in 2004. It took measures in aspects of easing price contradictions, tentatively implementing discriminated price and time-of-use price and issuing a policy on the linkage of coal and electricity prices and price administration. In 2005 the basic thinking of the Commission's electricity price reform is to actively advance the pilot work of price reform,carry out the reform of transmission and distribution price, enlarge the scope of pilot work of large consumer's direct purchase, simplify sales price structure and bring about the linkage of coal and electricity prices.

Deformation mechanism and stability control of roadway along a fault subjected to mining

It is difficult to maintain the roadway around a fault because of the fractured surroundings, complex stress environment, and large and intense deformation in the mining process. Based on a tailgate of panel $2205 in Tunliu colliery, in Shanxi province, China, we investigated the evolution of stress and displace- ment of rocks surrounding the roadway during the drivage and mining period using theoretical analysis, numerical simulation and field trial methods. We analyzed the deformation and failure mechanisms of the tailgate near a fault. The deformation of surrounding rock caused by unloading in the drivage period is large and asymmetric, the roadway convergence increases with activation of the fault and secondary fracture develops in the mining period. Therefore, we proposed a specific control technique of the road- way along a fault as follows： （1） High-strength yielding bolt not only supports the shallow rock to load- bearing structures, but also releases primary deformation energy by use of a pressure release device in order to achieve high resistance to the pressure retained： （2） Grouting of near-fault ribside after initial stabilization of the rock deformation is used to reinforce the broken rock, and to improve the integral load-bearing capacity ol~ the roadway. The research results were successfully applied to a field trial.