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用复数矢量法建立周转轮系各基本回路中各构件的角速度关系 ,在此基础上 ,引入符号流图的概念来描述这些关系并进行化简计算 ,直接从简化后的符号流图中得出结果 ,并以计算实例进行了说明 相似文献
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Seismic signal is generally employed in moving target monitoring due to its robust characteristic. A recognition method for vehicle and personnel with seismic signal sensing system was proposed based on improved neural network. For analyzing the seismic signal of the moving objects, the seismic signal of person and vehicle was acquisitioned from the seismic sensor, and then feature vectors were extracted with combined methods after filter processing. Finally, these features were put into the improved BP neural network designed for effective signal classification. Compared with previous ways, it is demonstrated that the proposed system presents higher recognition accuracy and validity based on the experimental results. It also shows the effectiveness of the improved BP neural network. 相似文献
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分析、比较了几种常用基本链型的机械利益、紧凑性、刚性及动态灵敏度等拓扑特性,可为概念设计中选择运动链提供参考。 相似文献
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为了解决电液伺服阀测试中手动测试效率低下、误差率高的现状,开发了一种基于LabVIEW图形编程语言的自动测试系统;系统结合NI PCI-6232板卡,用LabVIEW软件实现了电液伺服阀的静态及动态特性的自动测试,系统具有数据采集、处理及实时显示、数据保存等功能;对空载流量特性、零位泄漏特性、压力特性等进行了实验测试,并对测试结果进行了分析,各测试数据在伺服阀允许的误差范围内;实验结果表明测试系统运行良好、数据采集及处理可靠有效。 相似文献
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