星载大口径相机快门控制系统的研究与设计  

Research and design of control system of large aperture camera shutter powered by satellite

作　　者：吉星宇 岳永坚[1] 王冉珺[1] 

机构地区：[1]中国科学院光电技术研究所,四川成都610209 [2]中国科学院大学,北京100049

出　　处：《电子设计工程》2017年第24期138-142,共5页Electronic Design Engineering

摘　　要：星载大口径相机因其曝光面积大、工作环境复杂、系统可靠性要求高且需要小型化与轻量化,传统快门结构无法全部满足。本文针对以上特殊需求,设计了一种通过步进电机直接耦合并驱动快门叶片运动的对开式结构。并通过Matlab仿真的方式,比较并证明了采用抛物线型加速与正矢型加速相比于匀加速在运行的快速性与稳定性上具有一定的优势。设计了加减速曲线的离散化方案,并仿真比较了3种方案在离散输入下的优劣。采用oriental的PK233PB步进电机,RORZE的RD-024MSB驱动器及TI的TMS320F28335芯片搭建实验平台,对以上方案进行了实验比较,得出了抛物线型加速方案为综合最优方案的结论。Large aperture camera system powered by satellite works in harsh environment and requireshigh reliability.It also needs to be light in weight and small in volume.So tr-aditional not satisfy all above.To fulfill all the needs, I designed a new shutter system powered by a stepper mand then made computer simulation by Matlab.The result shows that parabola-type acceleration and cos- type acceleration are superior to constant acceleration.Then I designed a method to discretize thecontinuous input curve ofacceleration and deceleration for System- On-Chip real-time that I made c-omputer simulation to compare the output features of the discrete input.design , I established an experiment system which consists of a stepper motor PK233PB m- ade by ORIENTAL MOTOR , a driver RD- 024MSB made by RORZE and a DSP system based on TMS320F28335 made by Texas Instruments.The final exam shows that the para-bola-type acceleration isthe best on the whole.

关 键 词：步进电机 系统建模 加减速曲线 实时控制 

分 类 号：TN02[电子电信—物理电子学]