Design And Implementation Of An Inertial Actuator With Large-Force And Low-Power

Vibration control of large electromechanical equipment has important academic and engineering applications.Traditional vibration control technology mainly relies on passive flexible vibration isolators,which are difficult to isolate low-frequency vibration,while vibration active control technology has the advantage of suppressing low-frequency vibration.As a vibration active control system actuator,electromagnetic inertia actuator has the advantages of fast response,small size,compact structure,good linearity,etc.It has good effect on vibration control from 20 Hz to 300 Hz,and can be used for vibration active control of large electromechanical equipment.Domestic research on electromagnetic inertia actuators is relatively small,and the lack of large-value low-power molding products restricts the development of vibration active control technology applications.Therefore,it is important to carry out the development of large-value low-power electromagnetic inertia actuators.In this paper,the problem of power consumption of large-value electromagnetic inertia actuator is addressed,and the scheme of double coils with symmetric arrangement at both ends is adopted.The main research contents are as follows.(1)Considering the conditions of mass,size,assembly,output force value,etc.,the magnetic induction intensity at the center of the air gap of seven magnetic circuit configuration schemes is calculated and analyzed with the help of Maxwell and other simulation software,and the dual coil magnetic circuit scheme is established.The parameters in the dual-coil magnetic circuit are optimized and designed to obtain the optimal dimensions.The influence of the parameters of the suspension system on the operating characteristics of the electromagnetic inertia actuator is analyzed,and the structural parameters of the suspension system are optimized based on the response surface optimization method.The design of the large force value double coil electromagnetic inertia actuator is completed.(2)The heat loss of electromagnetic inertia actuator is analyzed by analytical method,and the expression of eddy current loss is derived to provide theoretical analysis for power consumption reduction.The simulation results show that the power consumption of the double-coil inertia actuator is lower,and the steady-state temperature at 90 Hz is lower than the rated operating stability of the permanent magnet,which ensures the reliability of the actuator in long-term operation.(3)According to the design,an electromagnetic inertia actuator prototype was processed.The test shows that the prototype can output 200 N in the frequency range of20Hz-300 Hz at rated current,which can output more force per unit current compared with the previously developed single coil actuator.The temperature rise of electromagnetic inertia actuator was tested,and the temperature rise of magnetic circuit was less than 48.8 degrees at 90 Hz for 3 hours,which is much lower than the rated working temperature of permanent magnet.The final result is a large force,low power consumption,and low frequency broadband actuator.