导弹跟踪能力的目标源与条件保障车的设计
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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 off-axis parabolic reflective mirror with a focal length of 700 mm was used to meet the requirements of 2′beam divergenceangle,multiple mirrors and off-axis 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%two-piece 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 first-order mode shape obtained by the modal analysis of the frame has a natural frequency of25.355 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.
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 off-axis parabolic reflective mirror with a focal length of 700 mm was used to meet the requirements of 2′beam divergenceangle,multiple mirrors and off-axis 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%two-piece 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 first-order mode shape obtained by the modal analysis of the frame has a natural frequency of25.355 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.
引文
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[4] WU Heyun,WANG Peigang.Designs of reflective off-axis system[J].Photoelectric Engineering,2006,33(1):34-37.伍和云,王培纲.离轴反射式光学系统设计[J].光电工程,2006,33(1):34-37.
[5] WU Wenbin,CHANG Jinbiao,QIU Yafeng.Design and analysis of optical system about visible light source target[J].Journal of Applied Optics,2015,36(1):114-118.吴文斌,常金彪,邱亚峰.可见光靶源光学系统的设计与分析[J].应用光学,2015,36(1):114-118.
[6] ZHAO Mingjun,LIU Jianxiong,CHANG Anmin,et al.Force analysis and finite element simulation of scissor elevators[J]. New Technology&New Process,2013(3):18-20.赵明君,刘剑雄,常安民,等.剪叉式升降机受力分析及有限元仿真[J].新技术新工艺,2013(3):18-20.
[7] HU Xiaozhou,HUJunke,HE Guohua.The modeling of scissors elevation mechan ism and research of key param eters[J].Mechanical Research&Application,2006,19(4):84-85.胡小舟,胡军科,何国华.剪叉式举升机构建模及关键参数的研究[J].机械研究与应用,2006,19(4):84-85.
[8] SU Guangxu,YUAN Duancai.Dynamics simulation of scissors elevating platform powered hydraulic cylinder[J].Journal of System Simulation,2010,22(11):2650-2653.孙光旭,袁端才.液压剪叉式升降台的动力学仿真[J].系统仿真学报,2010,22(11):2650-2653.
[9] DING Qunyan.Finite element simulation and modal analysis of semi-trailer frame[J].Equipment Manufacturing Technology,2017(10):28-29,32.丁群燕.半挂车车架有限元仿真与模态分析[J].装备制造技术,2017(10):28-29,32.
[10]BAI Yun,LI Shunming,WEN Jing,et al.Structure strength and modal analysis of frame for track-test vehicle[J].Vehicle and Power Technology,2017(4):17-23.白云,李舜酩,闻静,等.某轨道试验车车架结构强度与模态分析[J].车辆与动力技术,2017(4):17-23.