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   空中点火试验 的翻译结果: 查询用时:0.008秒
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空中点火试验
相关语句
  相似匹配句对
     TESTING
     试验
短句来源
     Experiment Research to Multi-Points-Ignition Technology
     多点点火技术的试验研究
短句来源
     Experimental Study on Electronic Ignition System of Engine
     电子节能点火装置的试验研究
短句来源
     Through the ignited experiment on ground and the formal use in shooting practice in the sky,it is proved that the design of the igniter is successful.
     点火器经地面点火试验空中靶试正式使用,证明设计是成功的。
短句来源
     AN APPLICATION OF AUTOMATIC IGNITOR DDK-1 TO TURBOJET ENGINE TEST UNDER SIMULATED ALTITUDE CONDITION
     DDK-1自动点火起动装置在涡喷发动机模拟空中点火起动试验中的应用
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The disadvantage of harmonic wavelets is that the rate of decay is so low (proportional to x -1 ) that localization is not very precise. This is because the Fourier transform of the wavelets is restricted to a specified frequency band. This paper gives a method smoothing the boxcar spectrum of harmonic wavelets to improve localization in time domain. The paper presents a method which improves the harmonic wavelets so that the improved wavelets have simpler structure and adjustable decay rates in time domain.The...

The disadvantage of harmonic wavelets is that the rate of decay is so low (proportional to x -1 ) that localization is not very precise. This is because the Fourier transform of the wavelets is restricted to a specified frequency band. This paper gives a method smoothing the boxcar spectrum of harmonic wavelets to improve localization in time domain. The paper presents a method which improves the harmonic wavelets so that the improved wavelets have simpler structure and adjustable decay rates in time domain.The improved harmonic wavelets are found to be more suitable than the conventional harmonic wavelets for vibration analysis because their rate of decay in time domain is much higher. The improved wavelets can also be computed by a numerically efficient algorithm based on the FFT. In this paper, the improved harmonic wavelets are used to analyze the dynamical behavior of a missile.Then a time frequency map is obtained, which can trace how the missile vibration signal changes with time.Finally the physical cause represented by the signal is interpreted.

针对谐波小波在时域衰减速度慢的缺点 ,对其在频域进行光滑化处理 ,得到了性质更好的改进谐波小波。由于采用光滑化方法只能得到改进小波在频域的表达式 ,因而采用基于 FFT的算法对它进行计算。针对振动信号一般采样点较多的特点 ,采用计算等间隔小波系数的方法以减少计算量。以改进谐波小波对某新型导弹空中点火试验的振动信号进行了时频分析 ,并采用计算时频图等高图的方法以消除大部分无用的信息 ,得到了振动信号的高清晰时频图

 
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