微处理器芯片的生态建设是高端装备与智能微系统自主、可控的关键,尽管国产数字信号处理(digital signal processing, DSP)器件及其相关开发应用技术近年来得到了一定的发展,但与需求仍存在较大差距。在主动噪声控制领域,前馈型多通道...微处理器芯片的生态建设是高端装备与智能微系统自主、可控的关键,尽管国产数字信号处理(digital signal processing, DSP)器件及其相关开发应用技术近年来得到了一定的发展,但与需求仍存在较大差距。在主动噪声控制领域,前馈型多通道控制方案比单通道有较大的控制范围和较好的性能,但对系统的运算能力有较高的要求。文章以多通道FxLMS算法为基础,对多通道降噪系统的运算量进行了分析,依据国产DSP开发板的电路结构,设计了控制系统方案,并进行了实验研究。实验表明,所设计的噪声控制系统运算效率较ARM作为运算器提高了80%,对100~1 000 Hz内的周期性噪声信号衰减达到15~20 dB,证明了该方案的正确性。展开更多
现代工业对电机控制要求的不断提高使得软件的规模和复杂度越来越高,而传统开发DSP电机控制软件的方式是手工编写C代码,其算法实现难度大、底层驱动配置复杂、开发效率低。针对该问题,研究一种高效的DSP代码开发方式——基于模型设计(Mo...现代工业对电机控制要求的不断提高使得软件的规模和复杂度越来越高,而传统开发DSP电机控制软件的方式是手工编写C代码,其算法实现难度大、底层驱动配置复杂、开发效率低。针对该问题,研究一种高效的DSP代码开发方式——基于模型设计(Model Based Design,MBD),该方式以MATLAB为开发平台,可实现Simulink模型到C代码的自动转化,显著提高开发效率。文章首先介绍MBD对电机控制开发的支持并给出开发流程,然后以DSP永磁同步电机矢量控制为例,在Simulink下建立系统的仿真模型和代码模型,并自动生成C代码,最后将代码下载到DSP控制系统中进行软件测试。研究结果表明,利用MBD方式可快速、高效地开发出DSP电机控制代码,并且具有开发难度低、代码可移植性强等优点。展开更多
Presented is a scheme of an embedded video remote monitoring system based on TMS320DM642. Using DM642 as the data processing core, the remote monitoring system is composed of video acquisition module, video processing...Presented is a scheme of an embedded video remote monitoring system based on TMS320DM642. Using DM642 as the data processing core, the remote monitoring system is composed of video acquisition module, video processing module and communication module, which gives an implementation of class/mini driver module in DSP/BIOS integrated developing environment and also a common task module in application layer is achieved. The system realizes the entire functions of the analog video signal acquisition, H.264 video coding and Internet transmission. It provides the general connection for the future development and has good flexibility and extendibility. The system uses a modular design and overall development of programming methods to improve the efficiency of system development.展开更多
文摘现代工业对电机控制要求的不断提高使得软件的规模和复杂度越来越高,而传统开发DSP电机控制软件的方式是手工编写C代码,其算法实现难度大、底层驱动配置复杂、开发效率低。针对该问题,研究一种高效的DSP代码开发方式——基于模型设计(Model Based Design,MBD),该方式以MATLAB为开发平台,可实现Simulink模型到C代码的自动转化,显著提高开发效率。文章首先介绍MBD对电机控制开发的支持并给出开发流程,然后以DSP永磁同步电机矢量控制为例,在Simulink下建立系统的仿真模型和代码模型,并自动生成C代码,最后将代码下载到DSP控制系统中进行软件测试。研究结果表明,利用MBD方式可快速、高效地开发出DSP电机控制代码,并且具有开发难度低、代码可移植性强等优点。
基金National Natural Science Foundation of China(40274047)
文摘Presented is a scheme of an embedded video remote monitoring system based on TMS320DM642. Using DM642 as the data processing core, the remote monitoring system is composed of video acquisition module, video processing module and communication module, which gives an implementation of class/mini driver module in DSP/BIOS integrated developing environment and also a common task module in application layer is achieved. The system realizes the entire functions of the analog video signal acquisition, H.264 video coding and Internet transmission. It provides the general connection for the future development and has good flexibility and extendibility. The system uses a modular design and overall development of programming methods to improve the efficiency of system development.
