Research On Optimization Method Of Aircraft Electromechanical System Distributed Simulation Model

With the rapid development of system simulation technology,computer simulation plays an increasingly important role in the research of large real-time complex systems such as aviation and aerospace.Simulation of complex system has the characteristics of high precision,large calculation of model simulation,and high requirements for real-time performance,while the complex systems simulation is often less efficient.Distributed simulation technology plays a paramount role in improving the simulation scale and efficiency of large real-time systems.However,when performing distributed simulation on a large real-time system to optimize its simulation efficiency,the problems of synchronization of simulation models and real-time model data exchange as well as the model distributed task division need to be tackled simultaneously.On the basis of the foregoing,it has great significance to study distributed simulation technology of complex systems to optimize simulation efficiency.Selecting the electromechanical system in the distributed co-simulation of the advanced civil aircraft as the research object,this thesis aims to optimize its simulation efficiency and proposes a distributed optimization method which has the following three key steps: The first step is to ensure the synchronization of simulation model data;the second step is the option of simulation model data interaction scheme;the third step is to select the distributed dividing points of the simulation model.First of all,the thesis analyzes the Data Distribution Service related communication mechanism,and uses the DDS distributed interconnection system and AMESim software to design a model data interface.This data interface can integrate the distributed model into the distributed interconnection for unified management,which can ensure the synchronization of the model data after distributed simulation.Then,this thesis studies the basic simple discovery algorithm of DDS and the automatic discovery algorithm based on standard bloom filter,analyzes the similarities and differences between standard bloom filter and single hash function bloom filter and designed a DDS automatic discovery algorithm using a Bloom filter based on a single hash function,which optimizes the real-time of the model data interaction.Finally,the basic composition of the advanced civil aircraft 3H / 2H2 E structure is studied,the index system suitable for AMESim simulation division is constructed,and a task division method for electromechanical system simulation based on network model and combined weighting method is proposed to determine the distributed simulation division points,which are appropriately extended to electromechanical system graphical simulation.The results show that the distributed optimization method of the simulation model mentioned in this thesis can not only ensure the synchronization of the simulation model before and after distribution,but also yield good effects in simulation acceleration without changing the precision.This research refines the distributed simulation technology and provides ideas for distributed simulation of large real-time systems.