弓网振动试验系统的改进幅相自适应控制设计  

Modified amplitude-phase adaptive control in the pantograph-catenary vibration test system

作　　者：魏巍[1] 杨志东[1] 韩俊伟[1] 

机构地区：[1]哈尔滨工业大学机电学院,黑龙江哈尔滨150000

出　　处：《哈尔滨工程大学学报》2015年第5期702-706,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51205077)

摘　　要：为提高弓网振动试验系统的正弦信号跟踪精度,提出一种改进幅相自适应控制方法。在时域给出正弦信号的幅值误差、相位误差和中心位置误差的辨识公式,采用线性插值的方式对相位误差以超过系统控制周期的精度进行辨识。结合辨识误差,建立3个参数的迭代序列,并在考虑低频快速性与高频稳定性的基础上,对迭代速率进行分段处理。最后分别给出辨识和迭代部分有限状态机程序的计算机实现方法。由弓网振动试验系统的实验数据表明,该改进算法能有效提高正弦信号的跟踪精确,可广泛应用于工程领域。This paper proposes a modified amplitude-phase adaptive control （ MAPAC） for increasing the sinusoidal motion precision of the pantograph-catenary test system. Amplitude error, phase error and center position error of the sinusoidal signal are identified in the time domain. Through linear interpolation approach, phase lag time can be re-duced to a smaller value than the system control period. Iterative sequences of the three parameters are established with error identification and an iteration rate for subsections is built with both the rapidity in low frequency and the stability in high frequency taken into account. The stateflow programs are divided into the identification and iteration sections. The experimental result for tracing errors using the pantograph-catenary vibration test system shows that the novel control strategy significantly improves the tracking accuracy of the sinusoidal test signal. It can be widely used in other engineering systems that require precision for tracing sinusoidal motions.

关 键 词：幅相控制 自适应控制 弓网试验 精确跟踪 正弦振动 有限状态机 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]