mirror n. 1.鏡;反射鏡。 2.反映;借鑒;榜樣。 a concave [convex] mirror 凹[凸]鏡。 an electron mirror 電子反射鏡。 the mirror of fashion 流行事物的代表。 a mirror of the times 時代的反映。 done with mirrors 〔美俚〕用詭計弄成功的;神秘莫測地完成的。 hold the mirror up to nature 反映自然。 vt. 映,反射;反映。
Modal analysis and dynamic deformation of scanning mirror 掃描鏡動態(tài)面形變化和模態(tài)分析
High - speed scanning mirror is adopted to ensure high speed , great precision 采用高速掃描振鏡,速度快精度高
The scanning mirror system is execution component to compensates error brought by image movement . it is main component of aerial camera 本文所研究的掃描反射鏡系統(tǒng)是斜視航空相機實現(xiàn)像移補償?shù)膱?zhí)行元件,它是航空相機的重要組成部分。
Both results show that the inertial coupling of the platform to infrared camera scanning mirror , to evaluate mirror motion , is negligible and so the mirror can perform scans of the earth at the specified angular rate 兩方面的仿真分析表明:星體姿態(tài)運動干擾力矩對紅外相機掃描鏡轉動影響很小,紅外相機掃描鏡能夠按設計轉速正常運行。
This paper takes hj - 1b satellite and onboard infrared camera scanning mirror as research objects . the influences on respective motion performance caused by the dynamic interactions between them are evaluated . the emphasis is put on the influence of satellite platform ' s attitude motion upon infrared camera scanning mirror ' s continuous scanning motion 本文以hj - 1b衛(wèi)星和其上的紅外相機掃描鏡為研究對象,分析兩者之間的動力學耦合對各自運動特性的影響情況,并著重分析了衛(wèi)星平臺姿態(tài)振動對紅外相機掃描機構轉動的影響。
The electrical cut scanning mirror shows : this bilinear behavior results from different cracking ways under high and low strain amplitudes , that is , elastic cracking and brittle cracking respectively . cyclic hysteresis energy is an important fatigue parameter . the total cyclic hysteresis energy of gh4145 / sq increases gradually as strain amplitude goes from 1 % to 0 . 5 % , but it decreases when strain amplitude is lower than 0 . 5 % 在高溫低周疲勞下, gh4145 / sq合金的循環(huán)滯?能具有如下特征:在1 0 . 5應變幅范圍內,循環(huán)總滯?能是一個逐漸增大的過程,而當應變幅小于0 . 5時,總滯?能隨應變幅減小而趨于減?。话雺勖幍难h(huán)滯迥能和總滯?能與壽命之間的關系曲線表現(xiàn)出雙線性特征,轉折點對應0 . 5應變幅。
It analyses the causes to bright image movement , studies principle to compensate image movement , conforms project to compensate image movement , and designs framework to compensate image movement in the article ; to analyze and design configuration of the scanning mirror , to select matters of mirror and its support structures on the principle of consistent line expansion coefficient ; to ascertain type of moment electromotor by most rotating angle speed and most rotating moment which are required by loads in the period to take pictures , as well as by figuration size of electromotor ; to design retarder according as the electromotor parameters ; to design and optimize lightweighted mirror shapes , because the mirror is key part ; to design flexure support structure , to analyze static and dynamic characteristics of the support structure by name of patran program for validating desig n rationality ; to study function of the scanning mirror electric control system ; to test precision of the system , the results indicate the rationality of design of the scanning mirror system 本文通過分析像移產生原因、研究像移補償原理,確定像移補償方案,并根據(jù)像移補償原理設計補償機構;分析與設計掃描反射鏡系統(tǒng)結構,根據(jù)材料線膨脹系數(shù)一致原則,選擇反射鏡及其背部支撐的材料;由掃描反射鏡在擺掃周期內的最大擺掃角速度確定力矩電機的額定轉速,根據(jù)負載力矩確定電機的額定轉距,綜合電機外型尺寸等因素,確定執(zhí)行元件? ?電機的型號;根據(jù)所選電機的參數(shù)指標,設計1 : 6速比的減速器;利用patran軟件對掃描反射鏡系統(tǒng)中的關鍵件? ?反射鏡進行輕量化設計與優(yōu)化;設計反射鏡柔性支撐結構,并通過軟件分析支撐結構的力學特性,驗證反射鏡柔性支撐結構設計的合理性;從原理上研究掃描反射鏡控制系統(tǒng)功能;進行系統(tǒng)精度測試,測試結果表明掃描反射鏡系統(tǒng)設計的合理性。
In order to save time and reduce computational complexity in geometric calibration , a new idea is introduced , a new method on basis of it is presented . the image distortions are decomposed into nominal distortions , caused by nominal scan mirror and spacecraft motion , and seven perturbations , caused by deviations from the nominal motion . the paper analyzes each perturbation , build up a new equation to solve line of sight 為了快速地進行幾何校正,引進了一種新的思路,并加以改進,將圖像上的扭曲分解為標稱掃描鏡和衛(wèi)星運動引起的和七個偏離標稱運動的微擾量引起的兩個部分,引進了一種用偏導求視線的簡便方法,詳細分析了各個微擾量造成的影響,建立了新的視線求解方程。
The coordinate systems and time systems are described in detail at first , then the paper presents the whole algorithm containing line of sight generation and projection attitude data combination scan mirror calibration , find corresponding grid cell , resample . at the same time , scan gaps and detector delays are analyzed in detail 論文首先對校正過程中用到的時間系統(tǒng)和坐標系統(tǒng)作了介紹,然后給出了完整的校正算法,包括視線產生和投影、姿態(tài)合成、掃描鏡校正、尋找校正圖像空間像素到未校正圖像空間的對應像素位置、重采樣這幾個部分,并在相鄰掃描行間隙的插值上采用了簡潔的方法。