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.

Digital control of pulsed gas metal arc welding inverter using TMS320LF2407A

A digital control of pulsed gas metal arc welding inverter was proposed. A control system consisting of analogue parts was replaced with a new digital control implemented in a TMS320LF2407A DSP chip. The design and constructional features of the whole digital control were presented. The resources of the DSP chip were efficiently utilized and the circuits are very concise, which can enhance the stability and reliability of welding inverter. Experimental results demonstrate that the developed digital control has the ability to accomplish the excellent pulsed gas metal arc welding process and the merits of the developed digital control are stable welding process, little spatter and perfect weld appearance.

基于大创项目的应用技术开发实践——以数字电源教具设计为例

针对教学环节中的难点和重点内容,基于dsPIC33CK256MP505数字信号控制器芯片,为开发新型的数字电源教具,在降压转换器的电路拓扑结构基础上,利用MplabPowerSmart开发软件,完成了电压控制型数字环路补偿器的设计,实现3P3Z数字补偿器的实时算法功能。

非线性环路补偿的交错并联BUCK变换器数字控制策略研究

针对氢能燃料电池输出低电压、大电流,不能适用通讯基站电源的问题,设计了一种电力电子交错并联BUCK变换器,同时提出了一种非线性环路补偿的数字控制策略。文中采用两个BUCK电路并联,控制信号为180°两相交错脉冲宽度控制,采用小信号模型建立了电压环、电流环数学模型,控制策略采用电流内环、电压外环双闭环控制。为了控制快准稳,分别对两环路控制策略补偿校正设计,通过环路补偿数字控制策略搭建交错并联BUCK变换器simulink模型,仿真结果表明变换器在输入范围下实现了48 V直流稳定输出,验证了本研究的有效性。

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.

Position Sensorless Control for Permanent Magnet Synchronous Motor Using Sliding Mode Observer

An approach of position sensorless control for permanent magnet synchronous motor （ PMSM ） is put forward based on a sliding mode observer. The mathematical model of PMSM in a stationary αβ reference frame is adopted, and the system is controlled by the digital signal processor （ DSP; TMS320LF2407 according to the control achieve closed loop operation of the motor, the stator theory of sliding mode observer. In order to magnetic field should be vertical with the rotor magnetic field and be synchronous with rotor rotating, so the position and speed of PMSM is estimated in real time and the estimated position is modified continuously. The simulation results indicate that the proposed observer has high precision is more robust to the parametric variation and load in estimation of PMSM position and speed, and torque disturbance.

Development of a Reconfigurable Platform for Manufacturing Equipment Control

In modern manufacturing equipment control area,controller is required to deliver higher computing capability for adopting advanced algorithms to meet speed and accuracy requirements,and reconfigurabilities for changing or(and)adding features or functions.This paper presents a methodology in design and implementation of a high performance and reconfigurable platform for manufacturing equipment control.This methodology is in virtue of system on a programmable chip(SoPC)technolo- gy but replacing the on-chip processor by an external high performance,floating-point digital signal processor(DSP).The appli- cation of the DSP is designed as a multi-threaded framework,which has more flexibilities than a traditional single-loop one.Fur- thermore,the field programmable gate array(FPGA)system can be reconfigured easily and quickly to meet a new requirement by dragging and dropping pre-built components in a SoPC building environment.As a result,the controller platform is more recon- figurable in terms of algorithms and functions.This platform is implemented in a 3-axis milling machine control and the result indicates that the design and implementation presented in this paper is feasible.

一种高动态弱GNSS信号跟踪解调算法研究与实现

在某些高动态弱信号场景中,载波相位难以锁定。为实现对高动态弱全球导航卫星系统(GNSS)信号的跟踪,考虑锁频环较锁相环更为鲁棒,提出了一种基于锁频环(FLL)+差分解调的算法,实现对GNSS信号的跟踪和解调。该算法采用二阶FLL实现对卫星信号的频率进行跟踪,差分解调算法实现对比特数据的解调。工程应用上,算法采用现场可编程门阵列和数字信号处理器(FPGA+DSP)的架构实现,在FPGA中实现信号的跟踪信号的前处理,在DSP中实现跟踪环路算法、位同步和差分解调。本文在Matlab平台中实现算法的仿真,通过模拟器平台和对天接收真实的GNSS信号对算法进行验证。仿真结果与实验结果表明,该算法在高动态弱信号条件下能实现对卫星信号的稳定跟踪和数据的解调,克服了锁相环难以锁定导致数据无法解调的难题,最终实现GNSS信号在该条件下的位置、速度和时间(PVT)解算。

基于功率仿真软件的半实物电动机实验平台设计

为解决现有电动机驱动系统实验平台效率低、复杂控制算法实现难度大的问题,基于功率仿真(PSIM)软件构建一种自动生成数字信号处理器(DSP)程序代码的电动机驱动系统教学实验平台,实现电动机控制理论学习和实验验证的有效统一。该平台主要由基于PSIM软件的控制平台和基于DSP的电动机控制硬件系统构成。以磁场定向控制(FOC)算法为实例,阐述了半实物永磁同步电动机教学实验平台的构成和工作流程,并验证了该平台的有效性。

面向飞腾迈创数字处理器的内核代码自动生成框架

数字信号处理器(digital signal processor,DSP)通常采用超长指令字(very long instruction word,VLIW)和单指令多数据(single instruction multiple data,SIMD)的架构来提升处理器整体计算性能,从而适用于高性能计算、图像处理、嵌入式系统等各个领域.飞腾迈创数字处理器(FT-Matrix)作为国防科技大学自主研制的高性能通用数字信号处理器,其极致计算性能的体现依赖于对VLIW与SIMD架构特点的充分挖掘.不止是飞腾迈创系列,绝大多数处理器上高度优化的内核代码或核心库函数都依赖于底层汇编级工具或手工开发.然而,手工编写内核算子的开发方法总是需要大量的时间和人力开销来充分释放硬件的性能潜力.尤其是VLIW+SIMD的处理器,专家级汇编开发的难度更为突出.针对这些问题,提出一种面向飞腾迈创数字处理器的高性能的内核代码自动生成框架(automatic kernel code-generation framework on FT-Matrix),将飞腾迈创处理器的架构特性引入到多层次的内核代码优化方法中.该框架包括3层优化组件:自适应循环分块、标向量协同的自动向量化和细粒度的指令级优化.该框架可以根据硬件的内存层次结构和内核的数据布局自动搜索最优循环分块参数,并进一步引入标量-向量单元协同的自动向量化指令选择与数据排布,以提高内核代码执行时的数据复用和并行性.此外,该框架提供了类汇编的中间表示,以应用各种指令级优化来探索更多指令级并行性(ILP)的优化空间,同时也为其他硬件平台提供了后端快速接入和自适应代码生成的模块,以实现高效内核代码开发的敏捷设计.实验表明,该框架生成的内核基准测试代码的平均性能是目标-数字信号处理器(DSP)--的手工函数库的3.25倍,是使用普通向量C语言编写的内核代码的20.62倍.

基于DSP的永磁同步电动机RCP对拖实验平台设计

为了满足永磁同步电动机(PMSM)运动控制的教学和科研需求,设计了基于数字信号处理器(DSP)的PMSM快速控制原型(RCP)对拖实验平台。根据PMSM矢量控制原理,利用MATLAB/Simulink搭建算法单元仿真模型,对不同控制算法下的性能进行仿真与实验验证。结果表明,该实验平台对PMSM控制算法开发效率的提升以及性能验证有着重要意义,为使用者对PMSM算法的快速实现与验证提供可能。

基于CAN总线的城市轨道交通综合监控系统设计

城市轨道交通监控涉及车内监控分站和人员跟踪分站等多个方面,其数据采集和处理的实时性、准确性会影响监控系统的运行性能。为提高监控系统CPU利用率和安全性,文中基于CAN总线技术设计一种城市轨道交通综合监控系统。基于CAN总线设置城市轨道交通综合监控框架,硬件部分选择DSP数字信号处理器实现多节点数字信号处理;采用dasRdb系统数据库,利用实时数据服务器的空间分配技术处理数据。软件设计方面,在IndasMake开发环境中分析IndasIBNS组态软件,分别设计城市轨道交通综合监控模块、系统权限与安全管理模块、网络监控功能模块、监控报警模块。为验证基于CAN总线的城市轨道交通综合监控系统的整体有效性,设计实验进行对比测试。实验结果表明,所设计系统延时保持在2 s以下,系统CPU利用率高于89%,系统安全性高于91.5%,说明该系统监测效果较好,安全性高。

基于DSP28379的改进线性自抗扰电动机矢量控制实验设计

为了提升交流电动机的响应速度和抑制中频扰动的能力,设计并搭建了基于TMS320F28379D的改进线性自抗扰三相电动机矢量控制实验平台。硬件以双核DSP芯片为控制核心,系统时钟频率200 MHz;采用高集成度智能功率模块驱动电动机,无需光耦隔离驱动;利用旋转变压器测量电动机转速和位置信息,搭配解码芯片可实现16 bit高精度测量。软件以传统线性自抗扰算法为基础,改变扰动反馈通道并在误差反馈通道中加入低通滤波器,从而提出一种改进线性自抗扰控制算法,并通过实验进行实物验证。结果表明:相比于传统PI和线性自抗扰控制算法,改进算法的阶跃响应速度分别提升25%和18%,受瞬间扰动影响的转速跌落分别降低4倍和2倍,并且转速恢复时间分别减少85%和70%,大幅提升了系统的动静态特性。

基于DSP的LPMSM驱动系统自适应积分反推位置控制

直线永磁同步电机(LPMSM)取消了滚珠丝杠和齿轮等中间传动环节,致使参数摄动、外界干扰和齿槽力等因素直接影响驱动系统的性能。为提高LPMSM驱动系统的位置跟踪精度,提出了一种自适应积分反推控制(AIBC)方法。建立含有干扰项的LPMSM系统模型,设计AIBC克服干扰对系统的影响,通过引入自适应律可对系统干扰进行估算并实时调整控制器参数,确保电机实际位置跟踪给定参考轨迹。采用高性能的数字信号处理器(DSP)作为控制核心,验证AIBC方法的有效性。结果表明,该方法可以使LPMSM驱动系统具有良好的伺服性能。

A time-domain digitally controlled oscillator composed of a free running ring oscillator and flying-adder

A time-domain digitally controlled oscillator （DCO） is proposed. The DCO is composed of a free-running ring oscillator （FRO） and a two lap-selectors integrated flying-adder （FA）. With a coiled cell array which allows uniform loading capacitances of the delay cells, the FRO produces 32 outputs with consistent tap spacing for the FA as reference clocks. The FA uses the outputs from the FRO to generate the output of the DCO according to the control number, resulting in a linear dependence of the output period, instead of the frequency on the digital controlling word input. Thus the proposed DCO ensures a good conversion linearity in a time-domain, and is suitable for time-domain all-digital phase locked loop applications. The DCO was implemented in a standard 0.13μm digital logic CMOS process. The measurement results show that the DCO has a linear and monotonic tuning curve with gain variation of less than 10%, and a very low root mean square period jitter of 9.3 ps in the output clocks. The DCO works well at supply voltages ranging from 0.6 to 1.2 V, and consumes 4 mW of power with 500 MHz frequency output at 1.2 V supply voltage.

超塑成形液压机加热平台测温系统的结构及原理分析

针对超塑成形对温度控制有严格要求的状况,对其加热平台进行温度探测,采集加热平台上多点的温度,将温度信号反馈至PLC,通过触摸屏显示,并通过PLC对各点温度进行对比,控制不同加电热管之间或同支电加热管的不同分段处的电流强度,达到平台各点温度迅速平衡的目的。测温系统由热电偶、西门子SM331热电偶模块、西门子S7-300 PLC可编程控制器、西门子FM355 PID闭环控制器、工业触摸屏等组成。通过热电偶直接测量温度输出电动势信号,并把电动势信号转换成PLC内部处理用的数字信号,最终由PLC进行处理后对相应电加热管的开关时间进行控制。

精密光电跟踪转台的设计与伺服控制

以某型号电视制导导引头为背景,针对载体上光电跟踪系统的特点,设计研制了一种新型四轴精密光电跟踪转台。在介绍转台主要性能指标的基础上,从系统机械谐振、结构建模、元部件选型计算方面进行了详细分析和设计,给出了基于高速DSP控制器和数字滤波的复合闭环伺服控制策略和实现方案。实验测试结果达到预先制定的设计指标和精度要求,表明了系统设计方案的实用性和有效性。所设计转台能够在实验室条件下模拟弹、箭制导导引头和机载光电成像跟踪系统等的动力学特性和各种运动姿态,为实际系统的研制和改进提供重要参考依据和实验数据。

基于扩张状态观测器的永磁无刷直流电机滑模变结构控制

根据无刷直流电机的数学模型和滑模变结构控制的特点,把换相引起的相电流变化当作外界对电机的干扰,建立了一个模型。根据此模型,构造了滑模变结构控制器,运用其对各种扰动不敏感的特性来抑制各种干扰对电机的影响。扩张状态观测器是一种性能良好的观测器,它不仅能得到不确定对象的状态,还能获得对象模型中内扰和外扰的实时控制量。电机的负载转矩用扩张状态观测器来准确估计,所以把它当作一个已知扰动来控制,这样提高了系统的控制精度。MATLAB仿真表明,与经典PID控制器相比,用滑模变结构控制器控制无刷直流电机,超调量小,速度响应快,且速度响应受电机参数变化影响小,各种外界干扰也得到了很好的抑制。用TMS320LF2407ADSP来搭建硬件电路,证明本控制器在实时控制中取得了很好的实验性能。

一种基于DSP的PMSM转子位置及速度估计新方法

在分析永磁同步电机数学模型的基础上,针对永磁电机无位置传感器运行的需要,提出了一种全数字化的基于估计坐标系的永磁同步电动机(PMSM)位置估算方法,并应用这种方法建立了永磁同步电机无位置传感器的矢量控制系统,在DSP芯片TMS320LF2407A上得到了具体验证和实现。该方案将电气稳态操作概念引入电机的状态估计中,有效解决了暂态过程中转子速度、位置估计不精确的问题。在讨论状态估计算法对电机参数依赖性的基础上,给出了估计误差补偿算法。该状态估计算法简单,计算量小,易于数字化实现。实验结果表明,所提出的PMSM无传感器控制方法具有较强的鲁棒性和令人满意的性能。