Research On Digital Design Technology Of Flight Control System

"Aircraft Digital Design & Manufacture Engineering (ADDME)"is a project that China aviation industry department starts for overcoming the disadvantages of traditional design method of aircraft, such as low quality, long period and costly. Digital design of Flight Control System (FCS) is an important part of ADDME, this paper focuses on it and does some research.First of all, the overall scheme of FCS digital design is proposed. The details include:â‘ The concept of digital design and layered digital design idea of FCS is proposed.â‘¡On this basis, the function architecture of FCS digital design is researched and divided into three parts: top level digital design, domain level digital design and auxiliary functions.â‘¢Based on the currently technical conditions, the design & modeling language and supporting environments based on COTS are designed.The second part of this paper deeply researches on the top level digital design technology. The details include:â‘ Specification, diagrams and application in FCS design of SysML, which is the core design & modeling language of top level digital design, are researched.â‘¡The structure, working principle and code component of SysML model built on top level design environments are analyzed firstly, on this basis, the FCS concept prototype schemes composed of SysML and Simulink model is given, and the collaborative simulation principle and simulation visualization problem are researched.â‘¢Based on traditional design process of FCS and characteristic of SysML, the top level digital design process model of FCS is studied and presented.â‘£The top level digital design is finished by treating the FCS of UAV Predator as a research object, and the FCS concept prototype of Predator, which runs correctly and meets the design requirements, is obtained.The third part of this paper deeply researches on the software digital design technology of the domain level. The details include:â‘ Specification, diagrams and application in flight control software design of UML are researched.â‘¡According the same characteristics of UML and SysML, the software digital design process model is presented based on cut and modification of high level process model.â‘¢OXF framework adapter design principle, which is the key factor of transforming from flight control software UML model to specific target platform source code, is researched.â‘£As treating UAV Predator as a research object, the software digital design is finished, and the UML model of its flight control software, which meets the design requirements, is obtained.The fourth part of this paper deeply researches on the auxiliary function technology which supports the top level digital design. The details include:â‘ The scheme of automatically generating high level digital design document is determined, on this basis, the document template, which matches the process model of top level digital design, is designed, then relevant design documents for Predator FCS designed in chapter 3 are generated.â‘¡Based on the analysis of models generated from top level digital design, its model management system is designed.At last, the research in this paper is concluded and prospected. The details include:â‘ The achievements and innovation of this research are concluded.â‘¡The thought of completing relevant research work is proposed.