Low order integral-action controller synthesis

A simple controller synthesis method is developed for certain classes of linear, time-invariant, multi-input multi-output plants. The number of poles in each entry of these controllers depends on the number of right-half plane plant zeros, and is independent of the number of poles of the plant to be stabilized. Furthermore, these controllers have integral-action so that they achieve asymptotic tracking of step input references with zero steady-state error. The designed controller’s poles and zeros are all in the stable region with the exception of one pole at the origin for the integral-action design requirement. The freedom available in the design parameters may be used for additional performance objectives, although the only goal here is stabilization and tracking of constant references.     

多级模糊控制的月球车避障研究

针对月球车这个MIMO系统,考虑其在未知环境下的避障问题,设计了一个多级模糊控制器,将输入变量分组设计子模糊作为第1级,再将第1级的输出作为第2级的输入变量设计第2级子模糊系统,最后控制系统输出平移速度和角速度。这样就避免了常规模糊系统中规则数目过大和设计繁琐问题,提高了整个控制系统的性能。该控制器模糊规则数量少,控制方法简单,响应速度快。最后的实验证明了该方法的有效性。     

基于通用分组无线业务短信控制的LED点阵屏设计

为满足中小商家的使用需求,给出了一种低成本、内容更新便捷的远程控制点阵LED文字显示屏的方案。该系统采用单片机(MCU)作为系统处理核心,采用 GPRS/GSM通信标准,通过显示屏上通用分组无线业务(GPRS)模块接收手机发送的控制命令及显示数据,经处理后控制LED显示屏的扫描显示,实现点阵屏远程更新显示内容。经一段时间的使用,系统运行稳定可靠,基本达到设计要求。     

低浓度瓦斯管道输送安全监控系统研究

随着低浓度瓦斯利用进度的加快,对于跨越5%～16%爆炸范围的低浓度瓦斯输送安全问题凸显,为保障低浓度瓦斯的安全输送和利用特研发了该套低浓度瓦斯管道输送安全监控系统。介绍了系统结构及工作原理,主要控制设备设计思路,软件及通讯单元设计思路。试验表明该系统能在低浓度瓦斯输送管道发生爆炸、燃烧等危险出现时能及时响应,有效阻止灾害扩大,保障低浓度瓦斯安全输送。     

机器人控制器体系结构研究的现状和发展

本文首先给出了机器人控制器的定义和分类,介绍了机器人控制器体系结构方面的 研究情况,提出了有关机器人体系结构研究发展的几个方向．     

Fault‐tolerant display image‐data‐manipulation unit for system‐on‐panel

Abstract— Bit‐partitioned and conventional shifts, as well as type transformations of multimedia data, are frequently used for display image‐processing systems. A data manipulation unit with fault‐recovery capability based on redundancies is proposed for system‐on‐panel with low processing technology yield. Utilizing data manipulations that are similar to normal shift operation, a proposed data‐manipulation unit is designed with a few additional paths added to the existing barrel shifter. The design methodologies are verified with FPGA and the performance is evaluated in terms of the advantages.     

Research on the controller of an arc welding process based on a PID neural network

A controller based on a PID neural network （PIDNN） is proposed for an arc welding power source whose output characteristic in responding to a given value is quickly and intelligently controlled in the welding process. The new method syncretizes the PID control strategy and neural network to control the welding process intelligently, so it has the merit of PID control rules and the trait of better information disposal ability of the neural network. The results of simulation show that the controller has the properties of quick response, low overshoot, quick convergence and good stable accuracy, which meet the requirements for control of the welding process.     

Semiochemicals for use with parasitoids: Status and future

Allelochemicals are known to serve important roles at all steps in the host-searching sequence of parasitoids. We discuss the various roles of these allelochemics and the type of information needed to develop their use in pest control, which to date has been very limited. Rapid advancements are being made with respect to airborne chemicals and longer-range foraging behavior. Moreover, recent discoveries have shown that genetic diversity in parasitoid populations and phenotypic plasticity of individuals, together with their physiological state, often result in substantial variations in the response to chemical cues. Successful application of semiochemical-parasitoid systems will require management of these intrinsic parasitoid variables as well as management of the foraging environment. We illustrate emerging technology for such an application. For the immediate future, the development of this technology will allow us to: (1) define the genetic and phenotypic foraging profiles important to consistent and efficient parasitoid foraging, and (2) establish the proper propagation and release procedures and monitoring bioassays necessary to ensure appropriate behavioral and physiological qualities of released organisms. For the long term, we envision technology for comprehensively manipulating the pest/crop environment in ways that would provide foraging stimuli and other needs important to retention and efficiency of parasitoids.     

Survey on model-based manipulation planning of deformable objects

A systematic overview on the subject of model-based manipulation planning of deformable objects is presented. Existing modeling techniques of volumetric, planar and linear deformable objects are described, emphasizing the different types of deformation. Planning strategies are categorized according to the type of manipulation goal: path planning, folding/unfolding, topology modifications and assembly. Most current contributions fit naturally into these categories, and thus the presented algorithms constitute an adequate basis for future developments.     

基于dSPACE的汽车ABS控制器开发

基于Matlab/Simulink和dSPACE开发汽车ABS控制器。控制器以dSPACE标准组件的MicroAutoBox作为汽车ABS的中央控制节点,用来接收车速信号、滑移率信号,并对这些信号进行处理。ABS执行器按信号要求执行相应动作进行汽车制动。结果表明该仿真平台能快速构建控制系统和模型,具有在线调参、实时仿真、目标代码快速原型化等优点,仿真精度高,可靠性好,节约研制成本,缩短研制周期。