An optimization method for pre-connection layout and multi-constraint action sequence of large aircraft components

Abstract

The invention provides a method for optimizing the pre-connection layout and multi-constraint action sequence of large aircraft components, including: using finite element analysis software to simulate the pre-connection process to obtain the one-to-one correspondence between the complex array and the pre-connection layout and sequence, assembly deviation and residual Gap data, as training data; Based on the multi-layer nonlinear artificial neural network RBF-ANN, the pre-connection assembly quality prediction model of aircraft large parts is established; based on the assembly quality prediction model, the weighted norm of assembly deviation and the weighted norm of assembly residual gap are constructed The comprehensive index of assembly quality is minimized as a fitness function, the pre-connection layout of large aircraft components and the optimization model of multi-constraint action sequence are established, and the optimal pre-connection layout and optimal action sequence are obtained by solving. The invention quickly and accurately obtains the optimal plan of pre-connection and sequence of large aircraft parts by creating a pre-connection layout and multi-constraint action sequence optimization model, thereby improving assembly efficiency and product quality.

Description

A pre-connection layout and multi-constraint action sequence optimization method for large aircraft components technical field The present invention relates to the field of assembly and manufacture of large parts of aircraft, in particular to a pre-connection layout of large parts of aircraft and multiple Constraint action order optimization method. Background technique Because error and deformation are easily produced in the assembly process of large parts of the aircraft, and each error source is in the step-by-step assembly process. Continuous transfer and accumulation make the walls and skeletons of the actual typical aircraft large parts "wing box" deviate from their nominal dimensions. inch, there will be a large assembly gap. If the assembly clearance of large parts of the aircraft is out of tolerance, it may cause the hole-making burr to enter the clearance and scratch the product, When the wall plate is disassembled and reset, the position of the fastening ...

AI Technical Summary

Problems solved by technology

During the production process, it was found that the pre-connection layout (that is, the position distribution of the pre-connection points) and the connection sequence of the pre-connection points will affect the assembly deviation of the wing box after pre-connection and the clearance level of the rest of the fastening holes of the wing box, which requires continuous trial and error. In the prior art, there is no method to quickly find the pre-connection layout and order that satisfies a certain assembly deviation and clearance control effect

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