一种飞行模拟机运动系统的抖振特效建模方法
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摘要
运动系统是构建飞行模拟机虚拟环境的主要分系统之一,抖振特效模拟是提高运动系统仿真度的重要研究内容。采用正弦加随机振动的基本模型,结合飞机试飞数据中的振动统计数据——加速度功率谱密度,建立抖振特效生成模型。研究基于加速度功率谱密度的抖振参数估计方法,实现正弦分量、随机分量参数的计算。分析典型飞行状态下的振动数据特性,研究抖振特效特征影响参数的提取方法,实现全飞行状态下的抖振特效生成。以抖振参数和特征影响参数为驱动,提出抖振特效的建模方法。实验结果表明,该方法能有效实现飞行模拟机系统中的抖振特效仿真。同时,也为虚拟现实技术其他应用中振动环境的构建提供一定的借鉴意义。
Motion system is one of the main subsystems of the virtual environment of flight simulators. Buffet simulation is an important content for the motion system to improve the fidelity. In this paper, a buffet model is established by using the basic model of sinusoidal and random hybrid vibration, combined with the acceleration power spectrum density(APSD) of the aircraft flight test vibration data. Based on the APSD, an estimate method of buffet parameters is studied to calculate the parameters of the sinusoidal and random components. The vibration characteristics of typical flight conditions are analyzed, and an extraction method of influence parameters is studied to achieve the buffet model under full flight condition. Driven by the buffet parameters and the influence parameters, a modeling method for the buffet analysis is proposed. The results show that this method can effectively simulate the buffet in flight simulator systems. Moreover, this study provides a reference for the construction of vibration environment in virtual reality technology.
Motion system is one of the main subsystems of the virtual environment of flight simulators. Buffet simulation is an important content for the motion system to improve the fidelity. In this paper, a buffet model is established by using the basic model of sinusoidal and random hybrid vibration, combined with the acceleration power spectrum density(APSD) of the aircraft flight test vibration data. Based on the APSD, an estimate method of buffet parameters is studied to calculate the parameters of the sinusoidal and random components. The vibration characteristics of typical flight conditions are analyzed, and an extraction method of influence parameters is studied to achieve the buffet model under full flight condition. Driven by the buffet parameters and the influence parameters, a modeling method for the buffet analysis is proposed. The results show that this method can effectively simulate the buffet in flight simulator systems. Moreover, this study provides a reference for the construction of vibration environment in virtual reality technology.
引文
[1] DAVID Allerton著.飞行仿真原理[M].刘兴科译.北京:电子工业出版社,2013:1-12.
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[3]中国民用航空总局.飞行模拟设备的鉴定和使用规则[S].北京:中国民用航空总局,2005.
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[8]蒋瑜,陶俊勇,王得志,等.一种新的非高斯随机振动数值模拟方法[J].振动与冲击,2012,31(19):169-173.
[9]关广丰,王海涛,熊伟.随机振动功率谱再现自适应控制算法研究[J].振动与冲击振动与冲击,2011,30(3):1-4.
[10]陈章位,于慧君.振动控制技术现状与进展[J].振动与冲击,2009,28(3):73-77+86.
[11]高亚奎,朱江,林皓.飞行仿真技术[M].上海:上海交通大学出版社,2015:375-377.
[12]付金良. MIL-STD-810中振动应力经验公式的研究[J].航空标准化与质量,1994,2:14-17.
[2]汪泓,谢东来.运输机飞行仿真技术及应用[M].北京:清华大学出版社,2013:200-226.
[3]中国民用航空总局.飞行模拟设备的鉴定和使用规则[S].北京:中国民用航空总局,2005.
[4] ICAO. Manual of criteria for the qualification of flight simulation training devices[S]. Third Edition. Montreal,Canada:ICAO, 2009.(Doc 9625-AN/938)
[5]庄表中.随机振动入门[M].北京:科学出版社,1981.
[6]袁宏杰,李传日.正弦加随机振动控制技术的研究[J].航空学报,2000,21(4):383-384.
[7]孙宁,李瑰贤.随机振动信号的一种简单模拟计算方法[J].振动与冲击,2000,19(2):50-51+63.
[8]蒋瑜,陶俊勇,王得志,等.一种新的非高斯随机振动数值模拟方法[J].振动与冲击,2012,31(19):169-173.
[9]关广丰,王海涛,熊伟.随机振动功率谱再现自适应控制算法研究[J].振动与冲击振动与冲击,2011,30(3):1-4.
[10]陈章位,于慧君.振动控制技术现状与进展[J].振动与冲击,2009,28(3):73-77+86.
[11]高亚奎,朱江,林皓.飞行仿真技术[M].上海:上海交通大学出版社,2015:375-377.
[12]付金良. MIL-STD-810中振动应力经验公式的研究[J].航空标准化与质量,1994,2:14-17.