Research On Vibration Reduction In The Process Of Optical-mechanical Module Transport

The construction of a large-scale laser device requires a transfer vehicle to transfer a large number of optical-mechanical modules.Whether these optical modules can be safely and smoothly transferred directly affects the construction progress and successful operation of the entire device.In this paper,the vibration caused by the long-distance transportation of the optical-mechanical module is studied.According to the characteristics of the transport vehicle’s own structure and motion mechanism,the corresponding vibration reduction scheme is designed,and the designed vibration reduction scheme is simulated and verified.The main research contents of this paper are as follows:First of all,the degree of freedom of the optical-mechanical module that needs to be damped during the transfer process of the transfer vehicle is analyzed,and the corresponding damping plan is proposed according to the damping index: the passive damping plan is adopted in the Z direction,and the three angles are around X/Y/Z.The direction adopts the active damping scheme,and the existing mechanism on the transfer vehicle is adopted for the active damping mechanism,which realizes the functional interoperability of the same mechanism.Secondly,for passive vibration reduction,the passive vibration reduction is mainly achieved by adding a spring damping element between the transfer vehicle and the clean keeping box.A dynamic model of passive vibration reduction was established according to the vibration principle,and the stiffness,damping and layout of the passive vibration absorber were designed;the parameters and vibration reduction characteristics of the passive vibration absorber designed were verified,including the modal analysis and damping characteristics of the transfer vehicle Time-frequency domain analysis,according to the analysis results,the vibration attenuation of 8Hz,10 Hz,15Hz,20 Hz can reach 62.86%,71.57%,82.77%,87.53% respectively..Then,for the active vibration reduction,the attitude adjustment of the active vibration reduction mechanism is mainly performed through the control algorithm and the control system to offset the attitude change caused by the transfer vehicle,so that the optical engine module maintains the original attitude.The analytic method is used to solve the kinematics of the active damping mechanism,and the method of comparison between Adams and Matlab is used to verify.At the same time,the natural frequency of the mechanism is analyzed through the modal analysis method.The result meets the requirements of actual use,which shows the rationality of the mechanism design.Finally,in view of the strong coupling,nonlinearity,redundancy and other characteristics of the active damping mechanism,the kinematics-based single-chain position closed-loop control strategy is adopted to design the PID control algorithm and fuzzy adaptive PID control algorithm of the active damping mechanism.,And use the Adams and Matlab co-simulation method to compare the two algorithms.According to the analysis results,the fuzzy adaptive PID control is better than the traditional PID control.The vibration attenuation of 0～1Hz in the three angular directions around X/Y/Z reaches 85.95%,86.07%,and 84.63%.