Subjects: Dynamic and Electric Engineering >> Electrical Engineering submitted time 2019-03-05 Cooperative journals: 《电气工程学报》
Abstract：针对采用差动方式测量位移的主动磁悬浮轴承控制系统，研究了电涡流位 移传感器故障信号与控制器输出信号之间的关系，分析了不同探头发生故障时位移传 感器输出和控制器输出的特征，介绍了自适应滤波的工作原理，进而提出了基于自适 应滤波的传感器故障诊断方法。该方法以两传感器输出信号的差值为参考信号对控制 器的输出信号进行滤波，得到控制器输出信号与两传感器输出差值信号之间的相关系 数，从而根据相关系数的极性准确判断出现故障的传感器。最后应用 Matlab 对其进行 仿真，并结合基于可编程序门阵列（FPGA）的自适应滤波器对故障信号进行实验验 证。结果表明，该方法可以准确地检测到传感器故障并识别故障传感器。
Subjects: Dynamic and Electric Engineering >> Electrical Engineering submitted time 2019-03-05 Cooperative journals: 《电气工程学报》
Abstract：热继电器过载保护的传统机理是依据双金属片的受热弯曲特性，但由于双 金属片材料及特性分散性较大、反时限特性单一、调整误差大、重复性差、易受环境 温度影响误动或拒动等原因，很难满足当今的过载保护要求。为了确保交流电动机安 全可靠的工作，需要对热继电器进行电子化和智能化的研究。本文提出了一种新型热 继电器的控制原理，通过实验验证了该原理的可行性，为电动机的热保护开辟了一条 新的途径。
submitted time 2018-10-26 Cooperative journals: 《电气工程学报》
Abstract： For position oriented precise control system, a BISS-C protocol communication system based on DC power line carrier technology is proposed. The carrier communication system is based on the BISS-C protocol, and it takes the DC power line as the carrier. The asynchronous communication is used to realize quasi synchronous signal transmission, thus the communication system is simplified and the utilization of cable is improved. Power supply and data communication multiplexing are realized by using two wires. The system is based on a programmable logic device (FPGA). The carrier hardware circuit is designed, the communication flow is planned, and the communication protocol is worked out. The experiment of servo motor closed loop control shows that the system is stable and reliable, and it can meet the communication requirements.
Hits
Hits
Downloads
Comment