Characteristics Analysis And Experimental Study Of Electromagnetic Actuator

In the actual vehicle-mounted photoelectric precision measurement project,the measurement equipment will be affected by the vibration of the vehicle engine and the power generator of the vehicle body,which will affect the measurement accuracy of the overall project.In order to solve the problem of error caused by vibration interference to the data in the project,the active vibration isolation technology with electromagnetic actuators as the active actuators can be adopted.It can effectively isolate the equipment used in engineering and obtain high-precision measurement results.In the active vibration isolation control,the electromagnetic actuator has an important role as a commonly used active actuator.However,the actual model of the electromagnetic actuator will deviate from the theoretical model in practical applications,which makes it difficult for conventional vibration isolation control strategies to achieve satisfactory results.At the same time,the electromagnetic actuator used in this experiment is a custom-made electromagnetic actuator,and the physical characteristics of its internal materials will also have some deviations,and it is not convenient to measure.Therefore,it is of great significance to conduct experimental research and analysis on the dynamic characteristics of the electromagnetic actuator,and it is also an important part of the real-time vibration control technology in practical engineering applications.This article mainly starts with the signal input and output characteristics of the electromagnetic actuator and the hysteresis nonlinearity,analyzes and experimentally studies the principles of the two characteristics,and performs calculation processing and mathematical modeling.This paper analyzes and models the signal input and output characteristics of electromagnetic actuators experimentally.The collected acceleration actuator output acceleration signal is subjected to signal denoising processing by a five-point movingaverage method,and the processed acceleration signal is subjected to frequency domain integration processing and Fourier transform to vibration displacement signals.Finally,a mathematical model that expresses the relationship between the input signal and the output signal of the electromagnetic actuator is calculated and analyzed by fitting and analyzing the input and output signals.After error analysis and calculation of this model,the error of the displacement amplitude is 2.83%,and the error of the phase angle is 0.85%.In this paper,experimental analysis and modeling of the hysteretic non-linear characteristics of electromagnetic actuators are performed.In the experiment,hysteresis characteristics experiments are performed to calculate the hysteresis curves of electromagnetic actuators at different frequencies,and the fitted curves are used to obtain mathematical expressions of different hysteresis curves.The signal points on different hysteresis curves were collected,and the results were calculated and fitted to establish a mathematical model of the vibration hysteresis amplitude of the binary change in voltage and frequency of the electromagnetic actuator.After error analysis and calculation,the error of the model is 3.26%.