| 基于短时傅里叶变换的飞控纵向频域等效拟配 |
| |
| 引用本文： | 冀翔,夏洁.基于短时傅里叶变换的飞控纵向频域等效拟配[J].北京航空航天大学学报,2011,37(7):872-876. |
| |
| 作者姓名： | 冀翔 夏洁 |
| |
| 作者单位： | 北京航空航天大学飞行器控制一体化技术重点实验室,北京,100191;北京航空航天大学飞行器控制一体化技术重点实验室,北京,100191 |
| |
| 摘 要： | 基于短时傅里叶变换(STFT, Short Time Fourier Transform)方法,进行飞控系统时域数据纵向频域等效系统的拟配研究.对系统的输入信号,运用STFT方法进行分解,得到驾驶员敏感的频带内的信号.利用快速傅里叶变换(FFT, Fast Fourier Transform)求取输入输出信号的频谱,由频谱导出系统的频率响应函数,并将其用于低阶等效系统拟配,得到低阶系统参数.这种方法提高了高低阶系统等效拟配的拟配效率,减小了拟配误差,改善了飞行品质的评估结果.
|
| 关 键 词： | 低阶等效系统 频域等效拟配 短时傅里叶变换 快速傅里叶变换 飞行品质 |
| 收稿时间： | 2010-09-10 |
Longitudinal frequency-domain equivalent matching method for flight control system based on short time Fourier transform |
| |
| Ji Xiang Xia Jie.Longitudinal frequency-domain equivalent matching method for flight control system based on short time Fourier transform[J].Journal of Beijing University of Aeronautics and Astronautics,2011,37(7):872-876. |
| |
| Authors: | Ji Xiang Xia Jie |
| |
| Institution: | Science and Technology on Aircraft Control Laboratory, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
| |
| Abstract: | Based on short time Fourier transform(STFT),a study was carried out on longitudinal frequency-domain equivalent matching for time-domain data in flight control system.The input signals of the system were first decomposed by STFT to achieve those signals that most interest the pilots.Then fast Fourier transform(FFT) was used to extract the frequency spectrums of both input and output signals.From the achieved frequency spectrums,the response function was derived and was applied in the low-order equivalent ma... |
| |
| Keywords: | low-order equivalent systems equivalent matching in frequency domain short time Fourier transform(STFT) fast Fourier transform(FFT) flying qualities |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《北京航空航天大学学报》浏览原始摘要信息 |
| 点击此处可从《北京航空航天大学学报》下载免费的PDF全文 |
