轻型宽视场航空相机稳定与扫描控制技术研究

发布时间：2018-05-14 13:49

本文选题：航空相机 + 视轴稳定　；参考：《中国科学院研究生院(西安光学精密机械研究所)》2015年硕士论文

【摘要】：航空相机作为获取地面信息的重要手段之一,近年来已经广泛应用于军事和民用领域。宽视场的航空相机因其较高的成像覆盖范围,逐渐成为市场的主流。本文结合研究室项目需求,设计了一种以 DSP+FPGA‖为核心的轻型宽视场航空相机稳定与扫描控制系统,系统以TMS320F28335为主控制器,以EP3C25F256型FPGA为辅控制器,实现了视轴稳定和相机摆动扫描两大功能。课题研究的主要内容有以下四个方面:1、研究了控制系统的组成,主要器件以及视轴稳定和画幅式相机摆扫成像的工作原理,并分析了影响控制系统性能的主要因素。2、基于工程化的设计方法设计了电流环、速度环、位置环三环路控制器,并采用改进粒子群优化算法对控制器参数进行了优化,同时设计了 S型+梯形‖的电机摆扫运行曲线。3、搭建了DSP+FPGA的双核控制器的软硬件系统,利用FPGA实现了光纤陀螺仪和光电编码器的数据采集及其数据的中值滤波,利用FIFO实现了DSP与FPGA之间的通信,并在DSP中实现了积分分离的数字式PID算法。4、进行了软硬件联调实验。实现结果表明,设计的控制系统实现了对扰动的隔离以及相机的摆动扫描,具有一定的工程实际应用价值。论文的最后对整个控制系统进行了总结,并指出了需要改进的地方。
[Abstract]:As one of the important means to obtain ground information, aerial camera has been widely used in military and civilian fields in recent years. Wide-field aerial camera has become the mainstream of the market because of its high imaging coverage. In this paper, according to the requirements of the research project, a light wide-field aerial camera stability and scanning control system is designed, which takes DSP FPGA as the core. The system takes TMS320F28335 as the main controller and EP3C25F256 FPGA as the auxiliary controller. The two functions of stabilizing the axis of view and scanning the camera swing are realized. The main contents of the research are as follows: 1. The composition of the control system, the main devices and the working principles of the imaging of the stable axis of view and the swing imaging of the frame camera are studied. The main factors affecting the performance of the control system are analyzed. Based on the engineering design method, the three-loop controllers of current loop, velocity loop and position loop are designed, and the parameters of the controller are optimized by using the improved particle swarm optimization algorithm. At the same time, the sweep running curve of electric motor with S-type trapezoid is designed. The hardware and software system of dual-core controller of DSP FPGA is built, and the data acquisition and median filter of optical gyroscope and photoelectric encoder are realized by FPGA. The communication between DSP and FPGA is realized by using FIFO, and the digital PID algorithm. 4 is implemented in DSP. The hardware and software combination experiment is carried out. The results show that the designed control system can isolate the disturbance and scan the camera swing, and it has some practical application value. At the end of the paper, the whole control system is summarized, and the improvement is pointed out.
【学位授予单位】：中国科学院研究生院(西安光学精密机械研究所)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：V445.8

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