摘要
磁流变阻尼器是通过改变线圈中的电流来改变其阻尼力的,而基于混合模式的磁流变阻尼器的阻尼力是由压力工作模式的阻尼力和剪切工作模式的阻尼力构成的。根据磁流变阻尼器的磁路设计和动态特性,推导了阻尼力、电流和磁场强度的计算公式及相互关系;针对阻尼器的时间响应要求,设计了一种脉冲宽度调制电流驱动器,通过仿真分析了电路中的电流响应时间。实验结果表明,电流响应快、精度高,达到稳态值的95%所需的时间为0.3～0.6ms,标准残差控制在0.11以内,满足磁流变阻尼器的控制要求。
The damping force of the MR damper is changed through changing the current in the winding of the MR damper, and it consists of two parts： the damping force in the pressure mode and the damping force in the cutting mode. According to the magnetic circuit and dynamic performance of the MR damper, the formulas of damping force, current and magnetic field intensity and their relationships were deduced. Aiming at the high time response requirement of the MR damper, a PWM current driver was designed, and the current response time of the circuit was analyzed through simulation. Experimental results show that the designed PWM controller features fast current response and high precision; the current can reach 95% of its steady-state value within 0.3 -0.6 ms, and the standard residual error is controlled under 0. 11. So, the designed PWM controller meets the control requirement of the MR damper.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2007年第8期1405-1409,共5页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(50375067)
高等学校博士学科点专项科研基金资助课题(20050299002)
江苏大学高级人才启动基金(05JDG015)资助项目
