sliding frequency 中文意思是什麼
sliding frequency
解釋
滑頻-
By using the processing method of sliding time window, the problem of the periodicity range ambiguity is solved. meanwhile, the problem of range ambiguity which is produced because the range of target is biger than the maximum range of radar is also solved by using this method. then, the pulse width parameter which is the most important in the parameters of fmicw is analyzed. the stricter restrict is given to ensure the range spectrum has only one beat frequency after signal processing. at last this thesis introduces the different signal processing methods of fmpcw and fmicw
同時利用該方法解決了fmpcw信號的由於目標距離超過雷達的最大單值測距范圍而引起的距離模糊問題。然後對fmicw波形參數中最為重要的脈沖寬度進行了分析，給出了更為嚴格的約束條件，保證了信號處理后距離譜峰值的唯一性。最後，分別介紹了fmpcw和fmicw信號的不同處理方式，並對兩者不同的時域濾波性能進行了比較，並對二者的差異進行了分析。 -
Based on the analysis of the beat frequency signal, the expression of the beat frequency phase is deduced. the expression indicates physics meanings of quantities to be detected and supplies theoretical bases for detection methods. by using two - dimensional fft, the range and velocity information of target is got out from the echo. according to the periodicity range ambiguity of symmetrical pulses in fmpcw, the processing method of sliding time window is used
通過對差頻信號進行的分析，得出了差頻相位的具體表達式，表現出了要檢測的各量的物理意義，對檢測的方法提供了理論依據。利用二維fft方法，可以有效地提取回波中目標的距離與速度信息。對于fmpcw信號由於均勻脈沖產生的周期性距離模糊的問題，採取時間波門的處理方法。 -
Its flaw is that after the system state getting to the sliding plane, it will produce high frequency chattering around the sliding plane and the control variable of the system will also produce high frequency chattering
它的不足主要是當系統運動狀態在到達滑動平面后，會在滑動平面附近產生高頻抖振，同時系統的控制量也產生高頻振蕩。 -
Study of the suppression of frequency shifting by sliding filter
滑頻濾波器對頻率移動抑制的研究 -
Recently, we propose that super - gaussian sliding - frequency filters are better in controlling timing jitter than the conventional filters usually in the form of fabry - perot etalons
很多文獻已表明，採用傳統的固頻或滑頻的濾波器（通常是f ? p標準具）能很好地控制噪聲和孤子的相互作用。 -
We have also demonstrated that the interactions between optical fiber solitons can be fully suppressed by super - gaussian sliding - frequency filters. computer simulations have shown a good agreement with theory
並且，通過與傳統的濾波器相比較，超高斯滑頻濾波器能更好地控制孤子的時間抖動。 -
By solving the nonlinear schrodinger equation with perturbation method and computer simulations, we have demonstrated that super - gaussian sliding - frequency filters are more effective to reduce timing jitter than conventional sliding - frequency filters without sacrificing the signal - to - noise ratio
通過求解非線性薛定諤方程和數值模擬，我們認為超高斯滑頻濾波器能很好地控制孤子的時間抖動和相互作用。 -
Third, a solid lubricant embedded 40cr - ptfe bearing and a bronze c86300 - ptfe bearing were prepared. the comparatively tribological tests were performed in an oscillating sliding tribotester. the conditions were a contact mean pressure of 80 mpa, an oscillating frequency of 0. 13 hz and relative humidity of
選擇40cr - ptfe鑲嵌型軸承與高強銅合金c86300 - ptfe鑲嵌型軸承在nh - 100型重載擺動摩擦試驗機上進行對比摩擦試驗，試驗條件為:承載壓強80mpa 、擺動頻率為0 . 13hz以及相對濕度為（ 60 3 ） % 。 -
Through establishing three mathematics models including the movement equation of the mechanical and electrical transmission system, the control of the load and the sliding in stable status, direct - current - brake of ac motor, this paper ascertained the range of the frequency value of drive motor and the efficiency of transmission system, calculated the efficiency of load motor in stable status and the moment of load motor in braking. this paper completed the design of the mechanical part of inertia brake test platform and provides a tool for the measurement of the inertia brake parameters
本文還通過建立慣性制動器試驗臺的包括機電傳動系統的運動方程、穩態運行時負載與轉差率控制、交流電動機直流制動在內的三個數學模型，確定驅動電機的頻率取值范圍和傳動系統的傳動效率，驗算慣性制動器穩態運行時負載電機軸功率和慣性制動器制動時負載電機軸力矩，完成慣性制動器試驗臺設計中的機械部分，為慣性制動器各參數的測量提供工具。 -
Some valuable conclusions are summarized by theoretical analysis and simulation experiments : from the side of signal processing, pulse jamming can be deleted by the method of time - domain sliding window accumulation and can be restored by interpolative prediction. ; gauss white nose can be attenuated while jamming disperse point - target by the method of time - frequency analysis in time - frequency domain. ; radio frequency noise jamming can be deleted by the method of average range frequency spectrum and notching in frequency domain
通過大量的理論分析和模擬實驗，得到了一批具有一定價值的結論：從信號處理的角度出發，對于脈沖式干擾，能夠運用時域滑動窗口積累的方法去掉，並且通過預測插值得到較好的恢復；對于高斯白噪聲干擾，在時頻變換域內應用時頻分析方法可減小其對分散點目標的干擾；對于射頻噪聲，通過平均距離頻頻法和頻域陷波的方法可以去掉；從改變合成孔徑雷達系統角度出發，類似雙基地雷達能夠避免各種干擾，對發射信號進行調幅，調相以及改變調頻斜率都是較好的抗干擾方法。 -
However, the chattering with high frequency in sliding mode control systems is a barrier for the application to the practice engineering problems
然而滑模變結構控制帶來的高頻抖振是其應用到實際系統的障礙。 -
Sliding mode control during variable speed constant frequency doubly - fed wind generator no - load connecting electric grid
變速恆頻雙饋風力發電機空載並網滑模控制 -
Secondly, spfm ( sliding polynomial fitting method ) was discussed and the arithmetic has been compared with pfm ( polynomial fitting method ). meanwhile, the model was corrected, and the parameters of arithmetic - - system sampling frequency, the length of sliding window and the exponent of fitting polynomial - - have been optimized
並在此基礎上討論了滑動窗多項式擬合預測演算法（ spfm ） ，對該演算法與普通的多項式外推預測進行了比較，對模型進行了適應性修正，並對演算法的參數：系統采樣頻率、滑動窗大小、擬合多項式指數進行了優化。 -
It will produce high frequency chattering around the sliding plane after the system state getting to the sliding plane, and the control variable of the system will also produce high frequency chattering so that the system would not be put into practice
但當系統運動狀態到達滑動平面后，會在滑動平面附近產生高頻抖振，這將會影響系統控制的精度，增加能量的消耗，並可能激發系統未建模部分的強烈振蕩，以致系統難以實現。 -
Then on one hand, author makes researches of anti - jamming against pulse jamming 、 gauss white noise jamming and radio frequency noise jamming from the side of signal processing. author exercises much signal processing knowledge of time - domain sliding window accumulation 、 wavelet analysis 、 time - frequency analysis and linear prediction and carries out many simulation experiments. on the other hand, author proposes the anti - jamming methods of using a sar similar to double - base radar and modulating the amplitude 、 the phase of emission signal and changing the frequency modulation slope from the side of changing sar system model
作者首先提出了合成孔徑雷達抗干擾的定義、分類以及評價抗干擾方法好壞的主客觀標準；然後，一方面從信號處理的角度出發對脈沖式干擾、高斯白噪聲干擾以及射頻噪聲干擾進行了抗干擾研究，其中運用了時域滑動窗口積累，小波分析，時頻分析以及線性預測等信號處理知識，做了大量的模擬實驗；另一方面，本文基於改變合成孔徑雷達系統模式提出了利用類似雙基地雷達來抗干擾，以及對發射信號進行調幅、調相以及改變調頻斜率來抗干擾，同樣做了相應的模擬實驗。 -
Super - gaussian sliding - frequency filters can be implemented with holographic fiber gratings
這種濾波器可以用全息光纖光柵製成。 -
Finally, the small computing load and error, and the better estimation effect can be obtained when sampling frequency is more than 4hz and sliding window is between 10 and 20 and polynomial exponent equals 3 or 4 by the computer - based simulation
最後通過計算機模擬說明在預測海上艦船運動時要求采樣頻率大於4hz ，滑動窗大小取10 20 ，多項式為3或4階時計算量和誤差較小，預測效果較好。
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