摘要
磁流变系统的控制效果依赖于系统建模,因此对滞后与动态响应特性的建模尤为重要。通过分析磁流变系统受控制信号激励时各部分的滞后,得到了系统研究各部分动态行为的方法;通过施加直流加交流的激励,测试与研究了磁流变测量系统的动态响应特性。结果表明,无偏置简谐电流激励下电流-剪切应力关系为蝶形曲线,经分析可知其由响应滞后所致,而曲线光滑的上下沿分别由滞后和系统的非线性导致。最后,通过引入滞后时间较好地描述了各种情况下电流与剪切应力间的动态响应关系,其值为23.1 ms。
The control effectiveness of magnetorheological systems depended on the modeling,which was crucial for modeling hysteresis and dynamic response characteristics.By analyzing the hysteresis of each part of the magnetorheological systems excited by a control signal,the method of systematically studying the dynamic behavior of parts was known.By applying the excitation of DC and AC,dynamic response characteristics of the magnetorheological measuring systems were tested and studied.The results show that the current-shear stress relationship under the excitation of the unbiased harmonic current is a butterfly curve,which is caused by the response hysteresis,and the smooths upper and lower edges of the curve are caused by the hysteresis and the nonlinearity of the system,respectively.Finally,the hysteresis time is introduced to better describe the dynamic response relationship between currents and shear stresses in various situations,and the value is as 23.1 ms.
作者
吕靖成
危银涛
邬明宇
何俊祥
梁冠群
尹航
LYU Jingcheng;WEI Yintao;WU Mingyu;HE Junxiang;LIANG Guanqun;YIN Hang(School of Vehicle and Mobility,Tsinghua University,Beijing,100084)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2022年第17期2017-2023,共7页
China Mechanical Engineering
基金
国家自然科学基金(51761135124,11672148,52003142,51775293)
汽车安全与节能国家重点实验室基金(20191)
清华大学Z05专项基金(20194180043)。
关键词
动态响应
磁流变
测量
滞后
dynamic response
magnetorheology
measurement
hysteresis
