摘要
针对基础激励会导致转子碰撞保护轴承,甚至引起系统失稳的问题,对电磁轴承柔性转子系统在基础平动激励条件下的振动位移响应特性及其控制进行了研究。首先,在基础坐标系中建立了电磁轴承柔性转子系统的运动方程;然后,以基础加速度为输入信号和LMS变步长算法设计了自适应控制器,根据位移差值自适应调节其输出信号,抑制了系统在该种扰动下的振动位移响应;接着进行了数值仿真,分析了基础平动激励条件下电磁轴承柔性转子系统的振动位移响应特性,并验证了所设计的自适应控制器在基础平动激励条件下对电磁轴承柔性转子系统振动的控制效果。研究结果表明:在基础平动激励条件下,电磁轴承柔性转子系统的振动位移响应与激励频率、激励幅值、激励相位等有关;该自适应控制器能够有效地抑制基础平动激励条件下电磁轴承柔性转子系统的振动位移响应。
Aiming at the problem that base excitation would cause the rotor to collide to protect the bearing and even cause the system to lose stability,the vibration displacement response characteristics and control of the active magnetic bearing-flexible rotor system under the condition of base translational excitation were studied.First,the motion equation of the active magnetic bearing-flexible rotor system in the base coordinate system was established.Then,an adaptive controller was designed with the base acceleration as the input signal and the LMS variable step algorithm,the output signal was adaptively adjusted according to the displacement difference,and the vibration displacement response of the system under this kind of disturbance was suppressed.A numerical simulation was carried out to analyze the vibration displacement response characteristics of the rotor system under the base translational excitation,and the control effect of the designed adaptive controller to control the vibration of the active magnetic bearing-flexible rotor system under the base translational excitation condition was studied.The results show that the vibration displacement response of the electromagnetic bearing-flexible rotor system under base translational excitation is related to the excitation frequency,excitation amplitude,excitation phase,etc.The adaptive controller proposed in this paper can effectively suppress the vibration of the active magnetic bearing-flexible rotor system under the base translational excitation.
作者
陈润田
祝长生
CHEN Run-tian;ZHU Chang-sheng(College of Electrical Engineering,Zhejinag University,Hangzhou 310027,China)
出处
《机电工程》
CAS
北大核心
2021年第6期673-680,共8页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(11632015)
国家重点研发计划资助项目(2018YF0905500)。
关键词
柔性转子
电磁轴承
基础平动激励
LMS算法
振动控制
flexible rotor
active magnetic bearing
base translational excitation
LMS algorithm
vibration control
