Research On Dynamic Measurement Layout Optimization And Its Algorithm Of Muti-station Heterogeneous Network

With the rapid development of modern manufacturing technology,the measurement requirements of large-scale equipment manufacturing are increasing in terms of large space,high precision,and low cost.As a result,heterogeneous networked measurement of a combination of multiple measurement systems has become a new research hotspot.However,Due to the lack of systematic and effective theoretical guidance,especially the lack of complete precision analysis methods,the research and application of networked measurement on heterogeneous platforms are obviously restricted.Based on the large equipment manufacturing and precision measurement of large-scale science and engineering requirements as the background,refining heterogeneous network coordinate measuring idea,in-depth study based on the point of intersection measuring system in dynamic measurement environment problems,focus on the dynamic error model based on the point of intersection measuring system and the layout optimization of under certain conditions,finally set up based on the dynamic measurement of w MPS system experimental platform,combined with specific engineering application completed the related validation.the main research content is organized as follows:1 、 Dynamic error model was established based on the Angle intersection measurement system.The composition and measurement principle of the angular crossplot measurement system were systematically described.The dynamic error source of the system was analyzed,and it was divided into the dynamic error caused by the observation Angle error of the station and the dynamic error caused by the movement of the measured target.2、Design experiments to verify the applicability of the dynamic error model.In the two-station w MPS system,the receiver was installed on a 1000 mm linear guide rail as the motion carrier,placed on the marble platform,and measured at a constant speed and at an equal distance.The measured motion trajectory linearity was compared with the simulation results.The results show that the experimental results are consistent with the simulation results.3、A layout optimization strategy based on firefly algorithm was proposed.The layout optimization objective function was established based on the above dynamic error model,and the corresponding optimization process was designed.Aiming at the defect that firefly algorithm is easy to fall into local optimization,Frefly algorithm based on the inertia weight logarithmic decreasing was proposed and simulated.The results show that the improved firefly algorithm could balance the global optimization ability and local optimization ability of the algorithm.4、An experiment was designed to verify the feasibility of the optimization algorithm.According to the existing spatial layout conditions,20 measured points were set up in the measuring area,and selected four-station system to carry out coverage measurement of the measured points.Based on the coordinate information measured by the laser tracker and the w MPS measurement system as the supporting platform,The measurement data before and after optimization are compared,and the results verify the effectiveness of the algorithm proposed in this paper.