基于DSP的直流无刷电动机神经网络控制系统

提出了一种直流无刷电动机的N-PID转速调节器的设计方法。在直流无刷电动机的高性能速度跟踪中,若仅采用传统的PID调节器,则难以克服系统超调和短时振荡问题,采用复合N-PID的控制方法,利用神经网络的自学习自适应功能在线调整PID控制参数。介绍了基于数字信号处理器的直流无刷电机神经网络调速系统,仿真结果表明,运用这种设计方法很好地抑制了超调和振荡。     

A Preliminary Examination of Identity Exploration and Commitment among Polish Adolescents with and without Motor Disability: Does Disability Constitute Diversity in Identity Development?

The aim of this study was to define whether, and to what extent identity formation in late adolescence is disability specific. Ninety-eight adolescents participated in this study, including 43 students with motor disability and 55 students without disability. Identity exploration and commitment was measured by the Utrecht-Groningen Identity Development Scale which consists of subscales covering three identity domains: a school domain and a relational domain divided into two subdomains concerning relationships with peers and parents. The results showed that the amount of commitment and exploration was lesser in those with motor disability compared to those without disability; the most common identity status in participants with motor disability was diffusion, whereas those without disability were primarily achievers across the three domains. However, the findings revealed consistently non-significant interaction effects between disability/non-disability and commitment and exploration. Thus, what constitutes diversity in identity development is the amount of commitment and exploration made by adolescents with and without disability, suggesting a different pace, but not a different direction of identity change in both groups.     

多楔带单根磨削机控制系统的改进

多楔带单根磨削机在调试时,存在步进电机只有正转不能反转的问题。在排除了步进电机驱动器、高速脉冲输出模块等硬件上的问题后,将高速脉冲输出模块设置成单脉冲控制方式,步进电机即可实现正、反转运行;如果程序中磨削进给量的分配是固定不变的,会产生磨削质量达不到要求,磨削效率低等问题。设计中采用磨削进给量和间隔时间都是变化的方法,可在保证产品质量的前提下提高生产效率。     

软启动器与SA828的结合应用

比较传统启动方式与软启动方式特点，简述软启动器的原理、功能。结合MCS-51系列单片机及PWM产生器SA828的特点，提出了一种用单片机实现的控制方法。     

韶山7E电力机车交流变频电动机的技术特点

交流变频电动机是电力机车的一种新装置，本文主要介绍了韶山7E电力机车交流变频电动机的技术特点。     

“Can I play too?” Adapting common classroom activities for young children with limited motor abilities

This paper offers suggestions on adapting common classroom activities found in early childhood classrooms to increase participation of young children with limited motor abilities. It stresses the importance of de-emphasizing differences among children and highlighting that all children, even those with severe disabilities, can benefit from the same activities.     

情绪智力的脑机制研究进展综述

根据认知神经科学的研究成果,介绍了前额皮层、腹内侧前额皮层、眶额皮层、前扣带回皮层、基底神经节、杏仁核、海马在情绪智力中的作用。探讨了情绪加工回路中各部分的功能与识别、体验、表达、评价、调控情绪和情绪信息能力之间的对应关系。强调了情绪回路中的特异性情绪加工只是相对的,各部分之间更多的是协调作用,感情加工与认知加工在大多数情况下也是密不可分的。     

数控机床三轴伺服电机安装——工程化教学案例实施

本文以数控机床三轴伺服电机安装为案例,结合自身数控机床装调与维修经验、课程项目工程化开发的经验及反思,积极探索研究数控机床装调与维修课程项目工程化的开发,建立一套具有职业教育工学结合的理论实践一体化的数控机床装调与维修专业方向课程项目工程化。     

电动汽车现状及未来

对电动汽车的关键技术进行了介绍,比较了电动汽车用各种型号电池的性能,总结了电动汽车用电动机需要满足的要求,及其动力总成的布局;对国内外电动汽车的现状进行了比较,并对其未来发展做了论述。     

Application of stochastic method to optimum design of energy-efficient induction motors with a target of LCC

INTRODUCTIONMostcountrieshaveimplementednewpoli ciesontheenergysavingandenvironmentpro tection.AmericanPresidentBushsigned“TheComprehensiveNationalEnergyPolicyAct”in1992statingthatnogeneral purpose ,three phaseinductionmotorswillbeallowedintoUnit edStat…