摘要
为了验证实验室环境下红外导引头跟踪能力的精度,设计了一套模拟飞行目标能量分布的目标源以及一款能够满足相应姿态条件的保障车。采用焦距为700mm的离轴抛物面反射镜,满足2′束散角的要求,利用多个反射镜及离轴镜构成反射式平行光管,模拟空间距离,通过1%和10%两片衰减片与光阑孔调节,实现三档能量的需要。采用微调升降机构实现0°～10°俯仰角的调节,滚转机构用以满足0°～10°的滚转角调节,运用液压升降机构达到0～1 000mm升降指标。依靠力学计算和静力学分析,得出升降臂的最大变形量为0.11mm,最大应力为111.6 MPa,能够满足1 000kg负载的要求,同时车架的模态分析所得到的一阶振型的固有频率为25.355Hz,远大于产生共振的条件,满足所设计的目标源和条件保障车指标要求。
In order to verify the accuracy of the tracking ability of infrared seeker in laboratory environment, a set of target sources that can simulate the energy distribution of flying targets and a guarantee vehicle that can meet the corresponding posture conditions were designed. An offaxis parabolic reflective mirror with a focal length of 700 mm was used to meet the requirements of 2′ beam divergenceangle, multiple mirrors and offaxis mirrors were used to form a reflective collimator to simulate spatial distance, the requirement of the third gear energy was realized by 1% and 10% twopiece attenuator and the adjustment of optical pupil. The fine adjustment lifting mechanism was used to realize the adjustment of 0°～10° pitch angle, the rolling mechanism was used to meet the adjustment of 0°～10° roll angle, and the hydraulic lifting mechanism was used to achieve 0~1 000 mm lifting index. The result that the maximum deformation of the lifting arm is 0.11 mm and the maximum stress is 111.6 MPa after mechanical calculations and static analysis, which can meet the requirements of 1 000 kg load. Moreover,the firstorder mode shape obtained by the modal analysis of the frame has a natural frequency of 25.355 Hz, which is much larger than the condition for generating resonance. Therefore, the target source and condition guarantee vehicles meet the requirements of the indicator.
作者
颜志刚
曹奕涛
邱亚峰
Yan Zhigang;Cao Yitao;Qiu Yafeng(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Shanghai Institute of Mechanical and Electrical Engineering,Shanghai 201100,China)
出处
《应用光学》
CAS
CSCD
北大核心
2018年第6期785-790,共6页
Journal of Applied Optics
基金
国家自然科学基金(61771245)
关键词
目标源
光学设计
保障车
静力学分析
target source
optical design
guarantee vehicle
static structural analysis
