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Fractional calculus has a history of300years.Itoccurred at almost the same time as classical integer or-der calculus,but it is different from the latter.It is asubject studying the derivatives and integrals with arbi-trary order.Since the computation of fractional calculusis much more complicated than that of integer order cal-culus,the development of the theory of fractional calcu-lus mainly focused on the pure mathematical domain formany years,and it is interesting mainly to mathemati-cians.… 相似文献
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Recently the focus of interest toward factional cal-culus and fractional systems became increasingly heat-ed. One of the important reasons is that many real phe-nomena, such as electrochemistry[1], heat conduc-tion[2], diffusion[3], and viscoelasticity[4], are wellsuited to be represented by fractional systems, i.e. itconforms to the real situations better if the order ofthese systems is non-integer rather than integer. For theidentification of integer order systems, there are manymature algor… 相似文献
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H型鳍片管传热过程的研究 总被引:1,自引:0,他引:1
采用MATLAB程序对于描述H型鳍片中传热过程的偏微分方程求解,对于影响传热过程的各个结构因素和热力参数进行了分析,得出优化鳍片管性能的途径. 相似文献
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使用自主开发的永磁同步直线电机试验平台,对国产永磁同步直线电机进行电机气隙与推力、相电流关系试验、伺服刚度试验和重复定位精度试验。通过对国产永磁同步直线电机与科尔摩根同类直线电机的速度跟踪、反电势试验分析,得出该直线电机的主要性能指标已接近或达到科尔摩根同类直线电机的水平。 相似文献
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使用National Instruments公司的LabView8.6.1和cRIO9074,cRIO9004软、硬件平台成功搭建一套永磁同步直线电机硬件在环实时仿真平台。其中cRIO9074和cRIO9004分别用于永磁同步直线电机控制器仿真和永磁同步直线电机模型仿真,两者采用高速数、模数据采集卡进行数据交换,且其核心算法全部在现场可编程门阵列(Field Programmable Gate Array,FPGA)中完成,具有50us级的高实时性特点。该仿真平台的快速成功搭建,可以预先验证永磁同步直线电机的控制算法,从而便于提早发现潜在错误,节约调试成本、缩短调试周期和尽可能减小事故发生概率。 相似文献
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采用有限元数值求解鳍片传热和传统相似理论计算方法相结合,得到符合经验数值的合理结果;对于工程实践具有参考价值。 相似文献
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