基于DSP28335的FPGA软件在线升级方法

在DSP+FPGA架构的嵌入式系统中,一些产品不具备拆卸外壳通过JTAG接口进行软件升级的条件。针对这一问题,提出了一种基于TMS320F28335的FPGA软件在线升级方法。该方法通过上位机将FPGA代码发送给TMS320F28335,TMS320F28335通过GPIO模拟JTAG时序,完成对配置PROM芯片的擦除、编程和校验操作,重新上电后FPGA从配置PROM加载新程序。在理论分析的基础上,给出了所提方法的硬件原理图和软件实现流程。大量实验结果表明,该方法具有较好的可行性、稳定性和可靠性,可以实现DSP+FPGA架构下不拆产品就可升级FPGA软件的目的。

基于高速串行总线的DSP+FPGA架构图像处理系统设计

采用高性能DSP+FPGA架构可满足嵌入式图像处理系统对大数据量、复杂算法的实时处理需求,传统的DSP+FPGA架构使用并行外部存储器接口作为数据传输接口,走线条数较多,布线难度大,故障点多。采用高速串行总线可解决以上问题,本文提出一种基于高速串行总线的DSP+FPGA架构图像处理系统,采用PCIe总线作为DSP与FPGA之间的图像数据传输通道,SRIO总线作为DSP与DSP之间的数据传输通道,SGMII总线作为DSP与PHY芯片的数据传输通道。高速串行总线使得数据传输率更高,布线更容易,减小了电磁干扰,提高了抗干扰能力。本文设计的系统已在实际场所中部署并稳定运行,验证了设计的可行性和系统的可靠性。

基于DSP+FPGA的旋转平台自抗扰控制方法

旋转平台在低速运转过程中易产生非线性摩擦,由于非线性因素的影响,传统PID算法的控制效果远不能满足超精密运动平台定位精度高、响应快速等要求。因此,设计了基于DSP+FPGA的旋转平台自抗扰控制算法(active disturbance rejection control,ADRC),利用扩张状态观测器(extend states observer,ESO)对系统内外部未知扰动进行实时估计并予以补偿,提升系统响应速度,增强鲁棒性与抗干扰能力。最后,通过正弦扫描实验进行验证,PID对正弦输入信号无法及时响应,超调明显;ADRC响应迅速,稳态误差波动小。相比PID,ADRC最大跟踪误差降低79.5%,跟踪误差平均值降低65.4%。

基于FPGA的DSP与ARINC429总线控制器接口设计

提出了一种基于FPGA的DSP与ARINC429总线控制器的接口设计方法和电路,该设计方法也适用于DSP与串口控制器、CAN控制器等接口的扩展设计。首先,分析了TMS320C6713 EMIF与HI-8582的主要信号与时序,表明通过FPGA实现译码逻辑和时序控制就可实现TMS320C6713与HI-8582之间的通信;接着,给出了详细的硬件设计和接口逻辑设计;然后,讨论了ARINC429总线驱动软件设计;最后,通过环境试验和实际应用验证了该接口电路工作稳定可靠。

Fuzzy PID Controllers Using FPGA Technique for Real Time DC Motor Speed Control

The design of intelligent control systems has become an area of intense research interest. The development of an effective methodology for the design of such control systems undoubtedly requires the synthesis of many concepts from artificial intelligence. The most commonly used controller in the industry field is the proportional-plus-integral-plus-derivative (PID) controller. Fuzzy logic controller (FLC) provides an alternative to PID controller, especially when the available system models are inexact or unavailable. Also rapid advances in digital technologies have given designers the option of implementing controllers using Field Programmable Gate Array (FPGA) which depends on parallel programming. This method has many advantages over classical microprocessors. In this research, A model of the fuzzy PID control system is implemented in real time with a Xilinx FPGA (Spartan-3A, Xilinx Company, 2007). It is introduced to maintain a constant speed to when the load varies.,The model of a DC motor is considered as a second order system with load variation as a an example for complex model systems. For comparison purpose, two widely used controllers “PID and Fuzzy” have been implemented in the same FPGA card to examine the performance of the proposed system. These controllers have been tested using Matlab/Simulink program under speed and load variation conditions. The controllers were implemented to run the motor as real time application under speed and load variation conditions and showed the superiority of Fuzzy-PID.

DSP ＆ FPGA-based control architecture for a highly integrated robot hand with enhanced impedance performance

A novel control system is developed to improve the capabilities of robet hand performing tasks in a variety of environments. A joint impedance control strategy has been successfully implemented in the low level control of a highly integrated robot hand. At flint, a real time controller with DSP＆FPGA-based multilevel control architecture is built. Then a current sensor of the single direct current （DC） link is used to measure and reconstruct the three phase currents, and a stable current signal is measured by optimizing sample instant. The experimental results of the joint impedance control show that the proposed method not only improves the effectiveness of contact environment performance, but also provides compliant interaction of robot hand with a person, which is very important for the development of friendly human robot of the next generation.

Synopsys的SRIO controller FPGA原型验证方法

包含SRIO接口的高性能处理器已广泛应用于航空航天通信系统,因此SRIO高速接口功能与性能的验证是系统设计的关键,同时设计可靠完备的验证平台对芯片SRIO controller的原型验证至关重要。本文基于对RapidIO协议的理解,搭建了Synopsys的SRIO controller+Xilinx Transceivers Wizard core FPGA原型验证平台完成对SRIO协议以及功能的验证。测试结果表明,所提的FPGA原型验证平台为芯片设计中的SRIO提供了一种高效的原型验证手段。

基于DSP与FPGA的工业计算机设计

工业现场的嵌入式计算机通常完成数据的输入、处理、输出功能,当需要处理的接口数量、种类较多时使用单DSP的计算机已经不能满足需求。针对该问题,本文将DSP与FPGA进行组合设计了一种多接口的高性能工业计算机,该工业计算机由FPGA实现接口或通信、由DSP实现控制算法。经系统试验证明,该工业计算机工作稳定、数据处理能力强、接口丰富,具备一定的工程实用价值。

一种多FPGA及多DSP的通用远程更新系统设计

为解决传统JTAG方式更新FPGA或DSP程序距离受限且灵活性较差的问题,设计了一种以FPGA为主控芯片的多FPGA+多DSP的远程更新系统。通过接收上位机指令的方式判断待更新的目标芯片,并将应用程序下发给指定FPGA或DSP完成程序的更新。同时设计了FPGA与DSP的重启方案,实现了远程更新程序与应用程序的跳转切换。测试结果表明,该远程更新系统可以实现对多FPGA+多DSP架构信号处理系统程序的远程更新。该系统实现简单、稳定可靠、可复用性强,能够降低工程应用的开发难度、缩短其开发周期。

基于FPGA和DSP的中频采集电路设计与实现

本文设计并实现了一种基于FPGA和DSP的中频采集电路。电路采用国产器件,旨在实现高效、稳定的中频信号采集。本文详细介绍了该电路的系统方案、元器件选型以及关键电路设计。测试结果表明,该电路能够实现对中频信号的高精度采集和处理,并具有良好的性能和可靠性。该研究为FPGA和DSP在中频信号采集领域的应用提供了一种有效的解决方案。

基于FPGA和多核DSP的雷达信号处理架构的分析

本文针对目前雷达信号处理的应用需求,结合雷达系统的硬件结构和运算处理特点,提出了一种基于FPGA和多核DSP的信号处理架构。该架构采用FPGA作为高速数据缓冲器,同时以多核DSP为核心组成信号处理系统,并利用FPGA的内部结构设计了信号处理系统的底层拓扑结构。实验结果表明,基于此架构设计的信号处理系统可以满足雷达系统对实时性和精度要求,同时可为后续更多算法和更复杂算法的实现提供硬件平台支撑。同时,该架构也可应用于其他高速数据传输、大容量数据存储等场合,具有重要的工程实践价值。

Development of FPGA Based NURBS Interpolator and Motion Controller with Multiprocessor Technique

The high-speed computational performance is gained at the cost of huge hardware resource,which restricts the application of high-accuracy algorithms because of the limited hardware cost in practical use.To solve the problem,a novel method for designing the field programmable gate array(FPGA)-based non-uniform rational B-spline(NURBS) interpolator and motion controller,which adopts the embedded multiprocessor technique,is proposed in this study.The hardware and software design for the multiprocessor,one of which is for NURBS interpolation and the other for position servo control,is presented.Performance analysis and experiments on an X-Y table are carried out,hardware cost as well as consuming time for interpolation and motion control is compared with the existing methods.The experimental and comparing results indicate that,compared with the existing methods,the proposed method can reduce the hardware cost by 97.5% using higher-accuracy interpolation algorithm within the period of 0.5 ms.A method which ensures the real-time performance and interpolation accuracy,and reduces the hardware cost significantly is proposed,and it’s practical in the use of industrial application.

Design and Application of a DSP Controller for Giant Magnetostrictive Smart Structure

It is proposed a digital signal processing （DSP） controller used in the control system of six degree-of-freedom （DOF） giant magnetostrictive smart structure （GMSS）. Also are presented the controller design and its implementation, the embedded adaptive least mean-square （LMS） control algorithm and the real-time experiments of GMSS. Three programs are embedded in this controller. Of them are the adaptive LMS control algorithm and the other two which are used to search for the optimal values for the initial weight vectors. Moreover, the work flow and the control approach of the GMSS with the DSP controller are introduced. The experimental results indicate that the DSP controller has better control precision and real-time property, and the damping effect is up to 20 dB-30 dB.

Reduction of current chopping noise with DSP controller in switched reluctance motor drive system

A novel current chopping mode was used in a switched reluctance motor drive system to make full use of the characteristics of digital signal processor (DSP) TMS320F240. The necessity of this 180° phase-shift current control (PSCC) mode is introduced first and then the principle of PSCC covering both hardware requirement and software programming is described in detail. The analysis made indicated that with this mode, the chopping frequency in winding can reach 20 kHz with 10 kHz power switches and the control frequency can reach 40 kHz at the same time. Subsequently, based on the linear and nonlinear mathematical models of the switched reluctance motor (SRM), some simulation work has been done. The simulation results show that when this mode is applied to SRM drive (SRD) system, the current waveform becomes better. So the ripple of the torque is reduced simultaneously and the vibration and acoustic noise are reduced involuntarily. Stationary tests show that the acoustic noise is greatly diminished. Finally, some experiments were made using a 50 kW SRD system for electric vehicle (EV). Experimental results indicate that this mode can be implemented feasibly and it has a good action on the SRD system.

基于DSP+FPGA的ARINC429总线通信设计

ARINC429总线因具有抗干扰能力强、可靠性高等优势而被广泛应用于航空工业领域的机载数据交互场景。对此,提出一种基于DSP+FPGA以及HI-3593芯片的ARINC429总线通信设计方案,着重阐述了系统的架构设计、HI-3593硬件原理设计与控制逻辑设计,最后对数据缓存控制、HI-3593芯片SPI接口控制以及数据读取、写入功能均进行了验证与测试。经测试,所设计的方案能够稳定可靠地实现ARINC429总线数据的接收与发送,满足飞机供电系统与机载管理计算机进行数据实时交互的需求。

DSP Based Simulator for Speed Control of the Synchronous Reluctance Motor Using Hysteresis Current Controller

This paper presents the field oriented vector control scheme for synchronous reluctance motor (SRM) drives, where current controller followed by hysteresis comparator is used. The test motor has a star-connected wound stator and a segmental rotor of the multiple barrier type with an external incremental encoder to sense rotor position. The magnetic characteristics of this motor are described using 2D finite element method, which is used firstly for rotor design of SRM. The field oriented vector control, that regulates the speed of the SRM, is provided by a quadrature axis current command developed by the speed controller. The simulation includes all realistic components of the system. This enables the calculation of currents and voltages in different parts of the voltage source inverter (VSI) and motor under transient and steady state conditions. Implementation has been done in MATLAB/Simulink. A study of hysteresis control scheme associated with current controllers has been made. Experimental results of the SRM control using TMS320F24X DSP board are presented. The speed of the SRM is successfully controlled in the constant torque region. Experimental results of closed loop speed control of the SRM are given to verify the proposed scheme.

Design of Industrial Robotic Controller Based on DSP

This paper describes the design of industrial robot controller based on the DSP technology. Robotic real time control is realized by PC and DSP motion control card and this method improves the performance of robotic controller. Finally this paper gives some experiment results and conclusion.

Implementation on FPGA of Neuro-Genetic PID Controllers Auto-Tuning

The present paper studies the use of genetic algorithm to optimize the tuning of the Proportional, Integral and Derivative (PID) controller. Two control criteria were considered, the integral of the time multiplied by the absolute error (ITAE), and the integral of the time multiplied by the absolute output (ITAY). The time variant plant tested is a first-order plant with time delay. We aim at a real time implementation inside a digital board, so, the previous continuous approach was discretized and tested;the corresponding control algorithm is presented in this paper. The genetic algorithms and the PID controller are executed using the soft processor NIOS II in the Field Programmable Gate Array (FPGA). The computational results show the robustness and versatility of this technology.

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.

DSP+FPGA折反射全景视频处理系统中双核高速数据通信

对于嵌入式折反射全景视频处理系统,由于计算量大,一般采用多处理器协同的结构,但在该结构下多个处理器之间需要进行高速的数据通信。该文提出一种基于DSP+FPGA架构的双核高速数据通信方法,该方法通过基于地址总线的控制指令编码解析方法协同双核工作,通过逆向波形分析和基于乒乓缓存的间接DMA通信方式,实现DSP与FPGA之间的双核DMA数据通信。实验结果表明,使用上述方法实现的DSP与FPGA之间数据通信速度高达585MBps。