The Principle,Model And Application Of System Fusion For Aerospace Megaproject

There are numerous technological innovations in major aerospace engineering,huge investment scale,complicated units,and huge challenges in the organization and management of projects.Therefore,the research and development of aerospace megaprojects are often accompanied by innovations in management theories and methods.For example,the American Apollo program has spawned the application of modern systems engineering methods,and the American Space Shuttle has advanced the development of quantitative risk analysis techniques and probabilistic risk analysis methods.In my country,the "integrated integration" theory and method proposed by Qian Xuesen not only well supported the development of my country's aerospace industry,but also gained good application in other areas of the national economy.At present,my country has carried out a number of aerospace megaprojects,such as lunar exploration projects,manned aerospace projects,and Beidou satellite projects,and the "integrated integration" theory and methods have also obtained new developments.It is necessary to thoroughly summarize the valuable experience of these major aerospace engineering management practices,and gradually establish my country's own major aerospace engineering management system to help my country's aerospace industry shift from "following" to "leading."This article will analyze the complex system characteristics of aerospace megaprojects from the perspectives of ontology,understanding and evolution based on the management practices of aerospace megaprojects in China,integrate foreign complexity science and China's "integrated integration" management ideas,and reveal the relationship between complexity and integrity.The dynamic mechanism of tension-driven behavioral decision-making for major aerospace engineering,based on the evolutionary laws of complexity and integrity of major aerospace engineering,a system fusion theory is proposed,based on the concepts and models of entropy,negative entropy,and quantitative description of system fusion theory,and finally a data-based system Fusion method.First,multi-scale complexity analysis of aerospace megaprojects.Aerospace megaprojects is a typical complex system.Based on the complex system theory,this paper analyzes the multi-scale complexity characteristics of aerospace megaprojects from three aspects: engineering ontology,cognition and evolution.Based on the correlation of elements of complex systems,the description framework of different types of systems in aerospace megaprojects is established,the characteristics of multi-scale complexity in engineering ontology are analyzed,and the contradictory relations among different scales of complexity are illustrated.Based on the characteristics of engineering ontology,this paper analyzes the challenges brought by multi-scale complexity to engineering cognition,discusses the limitations of average field theory in analyzing such systems,and puts forward the strategies of "dividing" and "combining" in case studies to recognize the multi-scale complexity of aerospace megaprojects.Corresponding to this strategy,the mechanism of "competition" and "sum" in the evolution of aerospace megaprojects is proposed from the perspective of multi-scale complexity evolution.This part of research has established the theoretical and logical foundation for putting forward the fusion principle of major aerospace megaprojects.Second,the construction of integration principles for aerospace megaprojects.This part is based on the basic cognition of the coexistence of the integrity and complexity of aerospace megaprojects.This part uses grounded theoretical methods,through large-scale interviews and data and text processing,to carry out open coding,main axis coding and selective coding.On this basis,it summarizes and refines the decision-making process that promotes the simultaneous evolution and development of the complexity and integrity of aerospace megaprojects.The research in this part reveals the dynamic mechanism of the tension-driven engineering behavior decision-making that the micro-complexity and the macro-integrity of major aerospace engineering are both contradictory and dependent,and summarizes the fusion process including "complexity degradation" and "integrit y neutralization".The theory and method of comprehensive integrated management.Third,the construction of fusion for major aerospace engineering systems.This part will analyze the complexity and integrity of major aerospace engineering based on the evolution of biological systems.The concepts and models of entropy and negative entropy will be used to describe the "complexity degradation" and "integrity neutralization" processes in the fusion principles of major aerospace engineering systems.Build a bi-level programming model that integrates various stages of the system,and apply the Beidou satellite "One Arrow,Two Stars" measurement and dispatch process to illustrate the application of the model.The research in this part will provide a quantitative method for the practical application of system fusion theory.Fourth,the fusion network model of major aerospace engineering systems.This part considers the correlation of each step in the system fusion principle,describes the tension change between macro-integrity and micro-complexity in aerospace megaprojects based on common information entropy,and aims at the main goals of each stage of system fusion within the Bayesian network framework Establish a system fusion model based on common information entropy,and design relevant intelligent algorithms to solve the models at each stage.This part of the study describes the system fusion process as the construction process of the Bayesian network,which can make full use of the relevant data obtained in various stages of aerospace megaprojects to provide methodological support for future intelligent engineering decisions.In the process of my country's march toward a space power,the successful implementation of aerospace megaprojects needs theoretical and methodological support consistent with my country's management thinking.The research in this paper expects to expand the theory and methods on the basis of my country's own "integrated integration" theory,to make China's voice in the current world's major engineering theory research field,and form China's own management theory method system.