CN-121981498-A - Connection structure assembly sequence self-adaptive planning method, system, equipment and medium

CN121981498ACN 121981498 ACN121981498 ACN 121981498ACN-121981498-A

Abstract

The application provides a connection structure assembly sequence self-adaptive planning method, a system, equipment and a medium, which comprise the steps of obtaining geometric centers according to space position information of all fasteners on a connection structure to be assembled, dividing the fasteners into a plurality of concentric annular areas taking the geometric centers as circle centers according to set ring diameter parameters, decomposing to form an assembly level from inside to outside, carrying out iterative decision by circularly executing preset diffusion-symmetry-uniform physical rules in each annular area to generate a complete global installation sequence, carrying out quantitative evaluation on the global installation sequence through defined quality evaluation indexes, and carrying out parameter closed-loop optimization according to evaluation results. According to the application, the optimal assembly sequence can be automatically and efficiently generated according to the actual spatial distribution of the fasteners, and effective digital tool support is provided for realizing the accurate regulation and control of the connection performance of high-end equipment.

Inventors

LIU YATAO
Xin Yuanlin
GAO YUAN
LIU SICHENG
SHEN CHAO
XU YANWEI
LIU YAN
LU HAO
ZHOU QUANZHI
LI YUHENG
FU JIE

Assignees

航天精工股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260407

Claims (10)

1. The connection structure assembly sequence self-adaptive planning method is characterized by comprising the following steps of: obtaining geometric centers according to the space position information of all fasteners on a connecting structure to be assembled, dividing the fasteners into a plurality of concentric annular areas taking the geometric centers as circle centers according to set ring diameter parameters, and decomposing the concentric annular areas to form an assembly level from inside to outside; Performing iterative decision-making by circularly executing a preset diffusion-symmetry-uniformity physical rule in each annular region to generate a complete global installation sequence, wherein the diffusion step preferentially selects fasteners which are close to the geometric centroid and have optimal uniformity in the rings; the symmetrical step is based on the determined reference point, a geometric symmetrical point is obtained according to the reference point and the geometric centroid, and a bolt closest to the geometric symmetrical point is selected in the searching radius; and carrying out quantitative evaluation on the global installation sequence through defined quality evaluation indexes, and carrying out parameter closed-loop optimization according to evaluation results.
2. The method for adaptively planning the assembly sequence of a connection structure according to claim 1, wherein: adding the geometric centroid as a virtual initial mounting point into a global selected point set; And traversing all the fasteners, determining the Euclidean distance between each fastener and the geometric centroid, determining the maximum number of rings according to the set ring diameter parameter and the Euclidean distance maximum value, and defining and dividing the concentric annular region.
3. The method for adaptively planning the assembly sequence of a connection structure according to claim 1, wherein: Defining a current ring to comprise a plurality of fasteners to be processed, initializing an index set of unselected fasteners in the ring and an in-ring ordered sequence, and acquiring a current global selected point set; Processing outwards from the innermost ring one by one, circularly executing diffusion-symmetry-uniform physical rules in each ring to perform iterative selection of fasteners, removing selected fastener indexes from an index set of unselected fasteners in the ring, adding the indexes to the tail end of the ordered sequence in the ring, and adding actual coordinates of the fasteners to a global selected point set; after all iterations of the current ring are completed, an ordered installation sub-sequence corresponding to the current ring is obtained, and the ordered installation sub-sequence is added to the global installation sequence in sequence to generate an ordered optimal assembly sequence from inside to outside in the ring.
4. A method of adaptive planning of the assembly sequence of a connection structure according to claim 3, wherein: by setting the step number of the step counter, for each round of iterative decision, taking a modulus of 3 according to the value of the step counter to select a corresponding physical rule, wherein the diffusion step comprises: The candidate set is constructed by selecting all the nearest fasteners to the geometric centroid in the index set of unselected fasteners in the loop, and selecting the fastener in the candidate set that has the greatest sum of distances to all points in the global selected point set as the selected point.
5. The method for adaptively planning the assembly sequence of a connection structure according to claim 4, wherein said step of symmetrically comprises: taking the last element in the in-loop ordered sequence as a determined reference point, and calculating a geometric symmetry point of the reference point about a geometric centroid; Searching all fasteners in a circular area in the index set of the unselected fasteners in the ring to form a candidate set, wherein the circular area is a local neighborhood search range formed by taking the geometric symmetry point as a circle center and taking a set search radius as a radius; In response to the candidate set being a non-empty set, selecting therefrom a fastener closest to the point of geometric symmetry; in response to the candidate set being an empty set, a fastener closest to the geometric symmetry point is selected from an index set of unselected fasteners throughout the ring.
6. The method for adaptively planning the assembly sequence of a connection structure according to claim 4, wherein said step of uniformly comprises: and selecting a fastener with the largest sum of the distances to all points in the global selected point set from the index set of the non-selected fasteners in the ring.
7. The method for adaptively planning the assembly sequence of a connection structure according to claim 1, wherein: The quality evaluation index comprises a global uniformity index and a symmetrical fit index; The global uniformity index is used for evaluating the spatial dispersion degree of newly selected fasteners and all installed points in the whole installation process; the symmetry fit index is used for evaluating the approach degree of the actually selected fastener to the ideal symmetry position in all symmetry steps.
8. A connection structure assembly order adaptive programming system, comprising: The concentric ring domain decomposition module is configured to obtain geometric centers according to the space position information of all fasteners on the connecting structure to be assembled, and divide the fasteners into a plurality of concentric ring areas taking the geometric centers as circle centers according to set ring diameter parameters so as to decompose and form an assembly level from inside to outside; The global installation sequence generation module is configured to carry out iterative decision by circularly executing preset diffusion-symmetry-uniformity physical rules in each annular region so as to generate a complete global installation sequence, wherein the diffusion step preferentially selects a fastener which is close to the geometric centroid and has optimal uniformity in the annular ring; and the sequence evaluation and optimization module is configured to quantitatively evaluate the global installation sequence through defined quality evaluation indexes and perform parameter closed-loop optimization according to evaluation results.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements a connection structure assembly order adaptive planning method according to any of claims 1-7 when the program is executed by the processor.
10. A non-transitory computer readable storage medium, wherein the non-transitory computer readable storage medium stores computer instructions for causing a computer to perform a connection structure assembly order adaptive planning method according to any one of claims 1-7.

Description

Connection structure assembly sequence self-adaptive planning method, system, equipment and medium Technical Field The application belongs to the technical field of high-end equipment assembly, and particularly relates to a connection structure assembly sequence self-adaptive planning method, a system, equipment and a medium. Background In the assembly of modern industrial equipment, the rationality of the mounting process is critical to ensure the performance and reliability of the connection structure. For a connecting structure involving a plurality of fasteners (such as bolts), complex mechanical interaction exists among the fasteners, and the installation sequence of the complex mechanical interaction directly influences the pretightening force distribution, the contact state and the long-term service performance of the structure, so that the complex mechanical interaction is a critical decision-making link in the assembly process. At present, the order is mainly formulated by the experience of operators, and empirical criteria such as 'crisscross', 'from the middle to the two ends' are formed for simple and regular connection forms (such as circular flanges and linear arrangement), and the order has a certain guiding significance, but is highly subjective and difficult to quantify. The conventional rule of thumb has limitations in the face of irregular layouts or large-scale complex connection structures. At present, a set of installation process guidance method which is universally applicable and based on an explicit physical principle is lacked in the industry, and an intelligent decision algorithm capable of automatically outputting an optimal sequence is not formed. The technical blank causes unstable assembly quality of complex equipment and difficult optimization of residual stress, thereby restricting the connection reliability, sealing performance and fatigue life. Disclosure of Invention In view of the above, the present application aims to provide a method, a system, a device and a medium for adaptively planning an assembly sequence of a connection structure, so as to solve the long-term problem that the assembly of a complex structure depends on manual experience and lacks a universal quantization tool. In order to achieve the above purpose, the technical scheme of the application is realized as follows: in a first aspect, the present application provides a connection structure assembly order adaptive planning method, including: obtaining geometric centers according to the space position information of all fasteners on a connecting structure to be assembled, dividing the fasteners into a plurality of concentric annular areas taking the geometric centers as circle centers according to set ring diameter parameters, and decomposing the concentric annular areas to form an assembly level from inside to outside; Performing iterative decision-making by circularly executing a preset diffusion-symmetry-uniformity physical rule in each annular region to generate a complete global installation sequence, wherein the diffusion step preferentially selects fasteners which are close to the geometric centroid and have optimal uniformity in the rings; the symmetrical step is based on the determined reference point, a geometric symmetrical point is obtained according to the reference point and the geometric centroid, and a bolt closest to the geometric symmetrical point is selected in the searching radius; and carrying out quantitative evaluation on the global installation sequence through defined quality evaluation indexes, and carrying out parameter closed-loop optimization according to evaluation results. In a second aspect, based on the same inventive concept, the present application further provides a connection structure assembly order adaptive planning system, including: The concentric ring domain decomposition module is configured to obtain geometric centers according to the space position information of all fasteners on the connecting structure to be assembled, and divide the fasteners into a plurality of concentric ring areas taking the geometric centers as circle centers according to set ring diameter parameters so as to decompose and form an assembly level from inside to outside; The global installation sequence generation module is configured to carry out iterative decision by circularly executing preset diffusion-symmetry-uniformity physical rules in each annular region so as to generate a complete global installation sequence, wherein the diffusion step preferentially selects a fastener which is close to the geometric centroid and has optimal uniformity in the annular ring; and the sequence evaluation and optimization module is configured to quantitatively evaluate the global installation sequence through defined quality evaluation indexes and perform parameter closed-loop optimization according to evaluation results. In a third aspect, based on the same inventive concept, the present applicati