【作者】 曾奇；

【导师】 张立中；

【作者基本信息】 长春理工大学 ， 机械电子工程， 2011， 硕士

【摘要】 机载吊舱能够稳定光学系统的视轴,使光学系统能够在机载环境下稳定地观测目标。机载吊舱在军用和民用方面都有广泛的应用。本文重点研究视轴稳定技术,主要包括被动减振和惯性稳定技术。被动减振的方法是在机载吊舱内环和外环之间安装减振器,通过减振器隔离飞机载体耦合的高频振动。惯性稳定技术是一个闭环伺服控制技术,伺服系统的执行器是直流力矩电机,传感器是惯性陀螺仪。本文还设计了内置电流环的双极性直流力矩电机驱动电路和以TMS320LF2407A为主控器件的控制电路。惯性稳定技术主要隔离低频振动。为了提高系统带宽,本设计采用三环控制策略,分别为电流环、速度稳定环、位置环。电流环内置在驱动电路中,稳定速度环采用了PID型ADALINE网络控制器,与经典PID相比较有明显的优势。论文最后部分提出了稳定精度测试方法,将机载吊舱安装在振动台上,振动台模拟出直升机的振动功率谱,然后测出系统的稳定精度。从实验结果分析,本系统稳定精度在30μrad以下,符合指标要求；从实拍图片看图像的显示效果较好,符合实际应用要求。更多还原

【Abstract】 Airborone pod can stabilize the visual axis of optical system, so that it can monitior the condition outside the aircraft, and it has been used widely in the military area and eivil area. This paper focuses on the visual axis stabilization technology, and it includes passive vibration isolation and gyro stabilization technology. We fit shock absorber between inner frame and outside frame, and the way can cancel the high-frequency vibration of aircraft; The gyro stabilization technology is a closed-loop servo control technology, the actuator of the servo system is the DC torque motor,and the sensor is inertial gyro. This content also contains the current loop design of bipolar DC torque motor drive circuit and control circuit of TMS320LF2407A. Gyro stabilization technology mainly isolated the low-frequency vibration of aircraft.In order to advance system band width, the design adopt three loop control strategy, such as electric current loop, velocity stabilize loop, position loop. Electric current loop frame at in driver circuit, steady speed loop adopt adaline Network Controller based on PID, compared with classical PID it has obvious advantage.Finally the paper give the test method of Stability index. Firstly,airborne pod is mounted on bench Simulating helicopter vibration;Then,we can test the Stability index of Airborone pod. From the experimental results, the Stability index is under 30μrad,and meet the index requirements; From pictures taken by Aircraft,it also meet the requirements of practical application.更多还原