摘要
为了使飞行仿真具有真实感和沉浸感,重现飞机座舱的三维声场环境是非常必要的.在确立飞行模拟器所要模拟的声音事件基础上,使用频谱分析和时频分析方法分析实际现场采集的声音数据,找出飞机各个部件声音的基本特征,再使用LMS自适应滤波及其他各种信号处理方法从原始录音中提取出用于仿真的声源.基于系统集成和性能的考虑,提出一种新的声音仿真系统组成方案,并在软件实现上使用面向对象的程序开发方法.详细讨论了研究开发三维声音仿真系统的关键技术,即声音实时合成技术和空间化技术.将开发出的三维声音仿真系统集成在实验室的波音737-800飞行模拟器中,经过大量试飞证明了该开发方法的可行性和有效性.
In order to obtain the sense of reality and immersion for flight simulation,it is very necessary to recur three dimensional（3D） sound field environment of aircraft cockpit.On the basis of determining the sound events to be simulated by a flight simulator,the frequency spectrum analysis and time-frequency analysis were used to analyze the sound data acquired from the pratical field to find out the basic sound characteristics of each component for an aircraft.And then the sound sources to be used in the simulation were extracted from the original sound record with LMS adaptive filtering and various methods for signal processing.Based on the consideration of both system integration and performance,a new component scheme for sound simulation system was proposed,and an object-oriented program development method was used for software realization.The key technologies for researching and developing 3D sound simulation system,namely sound real-time synthesis and spatialization technologies,were particularly discussed.The developed 3D sound simulation system was integrated in a Boeing 737-800 flight simulator in laboratory.A large amount of flight tests prove that the proposed development method is effective and feasible.
出处
《沈阳工业大学学报》
EI
CAS
北大核心
2012年第1期48-55,共8页
Journal of Shenyang University of Technology
基金
教育部新世纪优秀人才支持计划资助项目(NCET-04-0325)
国家"985"工程基金资助项目(CDAZ98502211)
关键词
声音仿真
频谱分析
时频分析
自适应滤波
面向对象
实时合成
三维
飞行模拟器
sound simulation
frenquency spectrum analysis
time-frequency analysis
adaptive filtering
object-oriented
real-time synthesis
three dimension
flight simulator
