Controller Design for Induction and Brushless Motors Using Matlab with Digital Signal Processor (DSP)

The automation process is a very important pillar for Industry 4.0.One of the first steps is the control of motors to improve production efficiency and generate energy savings.In mass production industries,techniques such as digital signal processing(DSP)systems are implemented to control motors.These systems are efficient but very expensive for certain applications.From this arises the need for a controller capable of handling AC and DC motors that improves efficiency and maintains low energy consumption.This project presents the design of an adaptive control system for brushless AC induction and DC motors,which is functional to any type of plant in the industry.The design was possible by implementing Matlab software and tools such as digital signal processor(DSP)and Simulink.Through an extensive investigation of the state of the art,three models needed to represent the control system have been specified.The first model for the AC motor,the second for the DC motor and the third for the DSP control;this is done in this way so that the probability of failure is lower.Subsequently,these models have been programmed in Simulink,integrating the three main models into one.In this way,the design of a controller for use in AC induction motors,specifically squirrel cage and brushless DC motors,has been achieved.The final model represents a response time of 0.25 seconds,which is optimal for this type of application,where response times of 2e-3 to 3 seconds are expected.

INTELLIGENT CONTROL SYSTEM OF PULSED MAG WELDING INVERTER BASED ON DIGITAL SIGNAL PROCESSOR

A fuzzy logic intelligent control system of pulsed MAG welding inverter based on digital signal processor （DSP） is proposed to obtain the consistency of arc length in pulsed MAG welding. The proposed control system combines the merits of intelligent control with DSP digital control. The fuzzy logic intelligent control system designed is a typical two-input-single-output structure, and regards the error and the change in error of peak arc voltage as two inputs and the background time as single output. The fuzzy logic intelligent control system is realized in a look-up table （LUT） method by using MATLAB based fuzzy logic toolbox, and the implement of LUT method based on DSP is also discussed. The pulsed MAG welding experimental results demonstrate that the developed fuzzy logic intelligent control system based on DSP has strong arc length controlling ability to accomplish the stable pulsed MAG welding process and controls pulsed MAG welding inverter digitally and intelligently.

Dynamic Power Dissipation Control Method for Real-Time Processors Based on Hardware Multithreading

In order to eliminate the energy waste caused by the traditional static hardware multithreaded processor used in real-time embedded system working in the low workload situation, the energy efficiency of the hardware multithread is discussed and a novel dynamic multithreaded architecture is proposed. The proposed architecture saves the energy wasted by removing idle threads without manipulation on the original architecture, fulfills a seamless switching mechanism which protects active threads and avoids pipeline stall during power mode switching. The report of an implemented dynamic multithreaded processor with 45 nm process from synthesis tool indicates that the area of dynamic multithreaded architecture is only 2.27% higher than the static one in achieving dynamic power dissipation, and consumes 1.3% more power in the same peak performance.

基于ARM的电阻炉炉温控制系统设计

在科学技术突飞猛进发展的背景下,现代工业生产中的电压、电流、开关量等都是重要的被控参数,在冶金制造业中,温度是器件生产过程中非常重要的物理参数,需要对各种加热炉的温度进行严格控制,对其温度变化进行实时监测,确保炉内温度满足制造器件的需求。电阻炉在金属热处理中具有较为广泛的应用,是进行金属锻压加热、烧结的重要工业设备。电阻炉温度控制多采用自动化控制系统,实现智能化管理,保证炉温的均匀度以及零件温度的均匀性,提高生产的可靠性和稳定性。从电阻炉温度控制的难点入手分析,结合电阻炉温度控制系统的设计原则,提出一种基于ARM处理器的电阻炉炉温控制系统设计方案,能够提高电阻炉温度控制的精度,保证工业生产的稳定性。

嵌入式处理器自定义指令迭代识别方法仿真

嵌入式系统中的硬件资源是有限的,并且自定义指令和原始指令之间可能存在冲突,导致指令代码识别精准度降低、运行功耗较高。为此,提出嵌入式处理器自定义指令迭代低功耗识别方法。对嵌入式处理器的指令代码展开可视化处理,将指令图像输入卷积神经网络中,检测指令代码中存在的恶意代码,采用开源编译器将代码转变为控制数据流图,枚举并选择子图,通过代码转换完成嵌入式处理器自定义指令识别。仿真结果表明,所提方法的恶意代码检测精度高、代码识别准确率高,始终保持在70%以上,平均能耗仅为89J。

电动履带式运输机智能语音控制系统的设计

采用语音识别模块,识别语音命令词控制电动履带式运输机。语音识别模块通过应用配置相关工作模式、识别语音命令词和发送识别语音后对应的通信命令,MCU接收、解析识别语音后对应的通信命令帧,并根据通信命令帧控制履带式运输机前进、后退、左转、右转、车斗升降以及语音播放执行命令的操作。

基于交叉开关互连的多核堆栈处理器架构设计

为满足堆栈处理器对于并行化程序应用的需求,提出一种多核堆栈处理器架构。在单核堆栈处理器的基础上,以交叉开关作为核间互连结构,通过对指令集、高速缓存器、一致性协议以及中断机制的设计,可在一个时钟周期内完成取指、译码、执行、核间数据传输和中断响应操作。在Xilinx FPGA芯片上进行单核、双核和四核堆栈处理器的实现,通过矩阵乘法计算进行性能实验验证,在100 MHz时钟频率的情况下,四核堆栈处理器的最大性能相当于单核堆栈处理器的3.99倍。实验结果表明,基于交叉开关互连的多核堆栈处理器架构可较好发挥多核堆栈处理器中每一个核心的性能。

Script Control在自动阅卷系统中的应用研究

为解决自动阅卷系统的通用性和独立性问题,对Script Control进行了深入的研究,提出了一种新的自动阅卷系统设计方案。介绍了基于Script Control的阅卷描述处理器的设计思想和实现原理,以及阅卷信息处理模块的一般结构,给出了基于Script Control的自动阅卷系统的阅卷描述样例。提供了该设计方案基于VB语言的关键实现,并通过实际测试验证了新的自动阅卷系统设计方案的有效性。

模块化多电平换流器阀控装置录波功能研究

模块化多电平换流器阀控装置的录波功能对观察子模块运行状态和分析子模块故障暂态过程具有重要作用,阀控装置集成内部录波功能有较大研究意义。针对阀控装置需接入海量子模块的工程应用需求,本文提出一种基于多核处理器和现场可编程门阵列(FPGA)硬件架构的阀控装置内部录波方案,介绍阀控装置录波功能相关的硬件架构、软件架构和测试方法。本文采用模块化分层解耦设计方法,通过底层系统软件、图形化工具软件和上层应用软件共同实现装置录波功能。利用柔性直流仿真控制系统对阀控装置录波功能进行测试,结果表明该功能可以满足工程现场应用需求。

一种高精度温度控制斯特林制冷器控制系统设计

通过对斯特林制冷机驱动控制器电路的分析和器件选型,设计了一款以DSP为核心控制芯片、硬件与软件相结合、可对斯特林制冷机进行高精度温度控制的电路。介绍了电路的设计思路、各模块组成和功能,提出了提高温度控制精度的方法,给出了实际测试结果。测试结果表明:所设计的斯特林制冷机驱动控制电路控温范围宽、高温特性好、控温精度高,具备一定的工程应用价值。

采用国产芯片的高档同步电主轴驱动电路的设计方法

本文主要阐述了应用全部由国产芯片组成的三闭环数字交流同步电主轴设计,采用预处理数据储存的方式,使单片机快速实时计算的任务提前计算完成,并以数据表的格式固化在驱动器的存储器中,从而可使用低档芯片实现高速化、高性能的功能,使普通国产芯片同样能实现与进口高速芯片相媲美的数字交流伺服控制,在我国电主轴行业中解决了进口芯片紧张的问题,并介绍了控制系统采用的硬件结构和实现方法。

中控主机在智能音视频系统中的应用

随着信息化浪潮在全球范围内的不断推进,智能音视频系统因其使用方便、效率高等特点,已经成为人们日常生活、工作、学习中不可或缺的一部分。中控主机在智能音视频系统中起着核心控制的作用。鉴于此,详细介绍中控主机在智能音视频系统中的实际应用,为相关使用人员提供参考。

基于主动噪声控制技术的校园房屋建筑减噪装置

随着城市化的快速发展和人口增长,校园房屋建筑周边环境噪声逐渐成为一个严重问题,给学生和教职工的学习和工作带来了困扰和不适。传统的隔音措施无法解决噪声源本身,因此需要开发一种能够主动减噪的装置。该文提出一种基于主动噪声控制技术的校园房屋建筑减噪装置。该装置通过采集环境噪声信号,并利用相位和频谱信息生成与之相反的声波信号,以实现噪声的减弱或消除。装置由噪声传感器、信号处理器、扬声器系统和控制系统组成,能够实时调整扬声器系统的输出,以达到最佳减噪效果。通过引入基于主动噪声控制技术的校园房屋建筑减噪装置,可以有效降低环境噪声对学生和教职工的不良影响,创造一个更安静、舒适的学习和工作环境。然而,装置的性能和可行性仍需要进一步研究和实践验证,未来可以进一步优化装置的设计,并探索其在更广泛的应用领域中的潜力。

基于FSMC接口的点火控制装置设计

介绍ARM处理器FSMC接口内部结构、机理及其初始化参数配置方法,将FSMC接口作为一种系统总线应用于点火控制装置,实现多回路阻值采集及点火控制。使用FSMC接口传输速度快,简化硬件设计,提高装置的可靠性。

某型航空发动机抗电源失效设计与试验验证

为应对外部电源可能出现的失效问题,某航空发动机控制系统开展电子控制器储能电路设计,并选用具有零偏功能的电液伺服阀。通过改造台架电源配置、增加延时继电器,实现模拟电源短时中断50ms和完全失效功能。整机电源失效试验表明,某航空发动机电子控制器CPU在外部电源短时中断50ms条件下可保持稳定工作,可取消配套应急电源设备;在电源完全失效情况下可通过切断关闭主燃油、调节几何角度使发动机安全停车,发动机性能和操纵性未发生变化,满足飞机使用要求。

一种基于组合传感器的汽车内环境控制系统设计

通过采用人脸识别传感器、声音识别传感器和多种环境传感器组合构成传感器阵列,并通过嵌入式微处理器进行集中控制,设计完成了具有人脸识别开门、哭声探测开窗、震动探测报警、雾霾探测除霜、自动恒温控制、自动光照度控制、内环境远程监测等功能于一体的无人驾驶汽车智能内环境控制系统。测试结果表明,该系统功能丰富并具有扩展性、智能化程度高,适合普通大众的需要,有助于提升无人驾驶汽车的乘坐舒适度和使用安全性。

基于物联网技术的智能水上垃圾处理器的研发与设计

文中针对水上垃圾处理问题,利用物联网技术研发了一种智能水上垃圾处理器。通过对垃圾进行识别和分类,实现了智能化的垃圾处理和收集。通过系统需求分析和设计,提出了智能水上垃圾处理器的功能需求、性能需求、硬件设计、软件设计和网络通信设计。同时,研究了关键技术,包括垃圾识别与分类算法、智能控制与操作系统、垃圾收集与处理机制。通过实验与性能评估,验证了智能水上垃圾处理器的功能和性能。最后,总结了研究工作,提出了进一步优化和发展的展望。

A Fuzzy Logic Based Supervisory Hierarchical Control Scheme for Real Time Pressure Control

This paper describes a supervisory hierarchical fuzzy controller （SHFC） for regulating pressure in a real-time pilot pressure control system. The input scaling factor tuning of a direct expert controller is made using the error and process input parameters in a closed loop system in order to obtain better controller performance for set-point change and load disturbances. This on-line tuning method reduces operator involvement and enhances the controller performance to a wide operating range. The hierarchical control scheme consists of an intelligent upper level supervisory fuzzy controller and a lower level direct fuzzy controller. The upper level controller provides a mechanism to the main goal of the system and the lower level controller delivers the solutions to a particular situation. The control algorithm for the proposed scheme has been developed and tested using an ARM7 microcontroller-based embedded target board for a nonlinear pressure process having dead time. To demonstrate the effectiveness, the results of the proposed hierarchical controller, fuzzy controller and conventional proportional-integral （PI） controller are analyzed. The results prove that the SHFC performance is better in terms of stability and robustness than the conventional control methods.

CONTROL SYSTEM OF MAGNETIC BEARINGS BASED ON LINEAR QUADRATIC METHOD OF OPTIMAL CONTROL STRATEGY

A state equation for radical 4-degree-of-freedom active magnetic bearings isbuilt, and the approach on how to use linear quadratic method of optical control theory to design acentralized and decentralized parameters control system is introduced, and also Matlab language isused to simulate and analyze. The simulation results have proved that the differences are smallbetween centralized parameters and decentralized parameters control system. The conclusions ofexperiments have shown that decentralized controllers designed from optimal state feedback theorymeet the requirements of active magnetic bearing system. The vibration amplitude of the rotor isabout 20 mu m when the speed of the rotor runs between 0 to 60 000 r/min. This method may be used inthe study and design of controllers of magnetic bearings.

REALIZATION OF FUZZY-FILTER CONTROL ON A BRUSHLESS AC GENERATOR

The transistor voltage regulators have been widely adopted in the brushless AC generators in aircraft. This paper researches the digital voltage regulator. The paper presents the hardware platform of the digital voltage regulator, which is based on a DSP chip — TMS320C32. A novel fuzzy filter control structure is developed from normal fuzzy control strategy. And the fuzzy filter control algorithm is adopted in the hardware platform successfully. The computer simulation has been conducted. Some control parameters have been obtained through the simulation. The same parameters have been applied in the digital regulation experiments on a brushless AC generator. In the experiment, the digital voltage regulator results in good responses. From the experiment results, it can be seen that the new control algorithm is efficient for the digital voltage regulator.