Image motion compensation ( imc ) is often used in aerial cameras to improve the quality of imaging 在研制航空相机时,为提高相机的分辨力,通常都采用像移补偿技术。
The scanning mirror system is execution component to compensates error brought by image movement . it is main component of aerial camera 本文所研究的扫描反射镜系统是斜视航空相机实现像移补偿的执行元件,它是航空相机的重要组成部分。
The simplified formula of image motion velocity ( imv ) is usually introduced in engineering . the formula ignores the effect of aircraft ' s initial rotational angle , which will necessarily bring on the error of imc 像移补偿在工程实现时,经常采用简化的像移速度公式。忽略了飞机初始姿态角的影响,这就必然带来补偿后的像移误差。
Different kind space cameras use different image motion compensation methods and drift angle controls respectively . applications of drift angle control in mechanical image motion compensation and electronic image motion compensation are introduced and analyzed in this paper 不同类型的空间相机有不同的像移补偿方法,也就有不同的偏流角控制方法,本文对机械像移补偿法、电子学补偿方法等像移补偿方法中的偏流角控制及作用进行分析。
The paper studied actual method of imc about panoramic aerial camera , and put forward a true _ angle imc method in scanning orientation . the true _ angle imc is independent of scanning velocity , and the demand of drum control system ' s rotational velocity ' s precision is reduced . at last , through experiments , the true _ angle imc was validated 研究了全景相机像移补偿的具体实现方法,提出了相机在摆扫方向上的真角度补偿方法,补偿后的像移误差与摆扫速度无关,从而降低了对镜筒扫描系统的稳速精度要求。
Image motion compensation ( imc ) is the key technology of high - resolution space camera . image motion speed is seperated into two vectors in image coordinate for the existence of the drift angle : the forward direction image motion speed and the crosswise image motion speed . in fact , drift angle control eliminates the crosswise image motion speed , so it is a part of image motion compensation 在空间照相,由于偏流角的存在,使得像移速度在像面坐标系存在两个分量:前向像移速度和横向像移速度,偏流角控制本质上是消除横向像移速度,因此,偏流角控制是空间相机像移补偿的一部分。
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 本文通过分析像移产生原因、研究像移补偿原理,确定像移补偿方案,并根据像移补偿原理设计补偿机构;分析与设计扫描反射镜系统结构,根据材料线膨胀系数一致原则,选择反射镜及其背部支撑的材料;由扫描反射镜在摆扫周期内的最大摆扫角速度确定力矩电机的额定转速,根据负载力矩确定电机的额定转距,综合电机外型尺寸等因素,确定执行元件? ?电机的型号;根据所选电机的参数指标,设计1 : 6速比的减速器;利用patran软件对扫描反射镜系统中的关键件? ?反射镜进行轻量化设计与优化;设计反射镜柔性支撑结构,并通过软件分析支撑结构的力学特性,验证反射镜柔性支撑结构设计的合理性;从原理上研究扫描反射镜控制系统功能;进行系统精度测试,测试结果表明扫描反射镜系统设计的合理性。
This paper analyses the applied characteristic of phase - locked loops ( pll ) for the forward motion compensation technology of lmk aerial survey camera . according to the analysis , a new style pcb is produced . the realization by software for the forward motion compensation is discussed in this paper , which is realized by the ti prduction tms320f240 在对lmk航空摄影机像移补偿控制系统的再设计工作中,本人设计出了新的补偿电路线路板,并进行了几项典型的实验研究和前向运动补偿效果评价,经过外场飞行试验,进一步证明了该设计的可靠性、可行性、实用性。