为补偿面阵测绘相机航摄成像过程中的前向像移,设计了采用压电陶瓷驱动器直接驱动焦平面组件的前向像移补偿系统,给出了前向像移补偿系统工作时序.压电陶瓷驱动器工作于位置闭环模式,通过斜坡递增设置压电陶瓷驱动器位置给定,使压电陶瓷驱动器驱动焦平面组件以期望速度移动,补偿前向像移速度.实验结果表明,前向像移速度为2.5 mm/s时,前向像移补偿系统最大像移补偿残差为0．38μm；前向像移速度为3．5 mm/s 时,最大像移补偿残差为0.48μm,远小于1/3像元尺寸.相机最长曝光时间为20 ms时,前向像移补偿频率可达25 Hz,满足高频航测成像前向像移补偿需要.
Forward motion compensation (FMC)system for airborne area mapping camera is designed, and the working schedule is presented.The FMC system uses piezoceramic actuator to drive the focal plane module directly.The piezoceramic actuator works at position close loop mode whose given posi-tion is set incrementally.This makes focal plane module move at desired speed so that forward motion speed can be compensated.Experiments imply that the maximum FMC residual error of the FMC sys-tem is 0.38μm when the forward motion velocity is 2.5 mm/s and the maximum residual FMC error is 0.48μm when the forward motion velocity is 3.5 mm/s.The residual errors are far less than one third of the pitch dimension.The FMC frequency is 25 Hz which satisfies the demand of high frequency aerial FMC while the maximum exposure time is 20 ms.
参考文献
| [1] | 刘明;匡海鹏;吴宏圣;刘钢;修吉宏;翟林培.像移补偿技术综述[J].电光与控制,2004(4):46-49. |
| [2] | 王德江;匡海鹏;蔡希昌;刘志明;张雪菲.TDI-CCD全景航空相机前向像移补偿的数字实现方法[J].光学精密工程,2008(12):2465-2472. |
| [3] | 李延伟;远国勤.面阵彩色航空遥感相机前向像移补偿机构精度分析[J].光学精密工程,2012(11):2439-2443. |
| [4] | 远国勤;丁亚林;惠守文;田海英;张景国;李延伟.彩色大面阵航空测绘相机前向像移补偿分析及误差纠正[J].光学学报,2013(1):235-243. |
| [5] | 范伟;余晓芬;奚琳.压电陶瓷驱动系统及控制方法研究[J].光学精密工程,2007(3):368-371. |
| [6] | 廖胜凯;刘银年;陈小文;王建宇.采用压电陶瓷驱动器的高频像移补偿系统[J].红外与激光工程,2011(3):539-543. |
| [7] | 张景国;丁亚林;田海英;李延伟;远国勤;于春风.一种彩色面阵CCD测绘相机前向像移的补偿方法[J].应用光学,2011(3):460-463. |
| [8] | 刘金琨.先进PID控制 MATLAB仿真[M].北京:电子工业出版社,2012 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%