CAJ | 학술논문

针对临近空间高超声速飞行器拦截问题，研究了一种具有清晰物理意义的改进视线坐标系，设计了相应的坐标系转换关系，并推导了拦截弹-目标的三维相对运动学模型；与传统的模型相比，该模型减少了状态方程的个数，使三维制导律的设计更加简捷、方便。在此基础上，采用基于L2-增益的鲁棒控制理论，将目标机动和拦截弹导引头的量测误差视为有界干扰，设计了一种基于改进视线坐标系的三维L2-增益制导律。仿真结果表明，相对于比例制导律，文中所设计的制导律可使弹目视线角速率在有限时间内趋近于零，且具有较短的拦截时间和更好的噪声抑制能力，有一定的工程应用价值。
침대림근공간고초성속비행기란절문제，연구료일충구유청석물리의의적개진시선좌표계，설계료상응적좌표계전환관계，병추도료란절탄-목표적삼유상대운동학모형；여전통적모형상비，해모형감소료상태방정적개수，사삼유제도률적설계경가간첩、방편。재차기출상，채용기우L2-증익적로봉공제이론，장목표궤동화란절탄도인두적량측오차시위유계간우，설계료일충기우개진시선좌표계적삼유L2-증익제도률。방진결과표명，상대우비례제도률，문중소설계적제도률가사탄목시선각속솔재유한시간내추근우령，차구유교단적란절시간화경호적조성억제능력，유일정적공정응용개치。
A modified line-of-sight coordinate system with plain physical meaning was investigated for near-space hypersonic aircraft interception. Besides, the exchange of two coordinate systems was designed, and a three-dimensional relative model between interceptor and target was deduced. Compared with traditional model, the new model reduces the number of the state equation,and makes the design of the guidance law more simple and convenient.Then,by adopting robust control theory with L2-gain, a three-di-mensional guidance law with L2-gain based on modified line-of-sight coordinate system was proposed by taking the target maneuver and the measurement error as bounded disturbance. Simulation results show that the proposed guidance law could make the line-of-sight angle converge to zero in finite time and has less intercepting time and better noise attenuation ability, which could offer some references for engineering application.