新体制光学遥感卫星变转速环扫控制方法  

Variable-speed Conical Scanning Control Method for New-type Optical Remote Sensing Satellite

作　　者：奚瑞辰 吴凡 岳程斐 曹喜滨[1] XI Ruichen;WU Fan;YUE Chengfei;CAO Xibin(School of Astronautics,Harbin Institute of Technology,Harbin 150001,China;Institute of Space Science and Applied Technology,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China)

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001 [2]哈尔滨工业大学(深圳)空间科学与应用技术研究院,深圳518055

出　　处：《宇航学报》2023年第8期1139-1150,共12页Journal of Astronautics

基　　金：国家自然科学基金(11972130,62003115)。

摘　　要：针对基于圆锥扫描的新体制超宽覆盖光学遥感卫星在变转速环扫成像过程中,多条带在固定时间内有效拼接的问题,为了确保其在一个环扫周期内,卫星在相机开机期间绕对地轴慢速稳定自旋、相机关机期间变转速快速自旋,并且在下一次相机开机时刻自旋到指定的相位,提出一种bang-bang控制与固定时间控制相结合的复合控制方法。首先给出变转速姿态控制问题的数学模型,并采用两次坐标旋转,分别描述垂直于自旋轴和绕自旋轴的运动,建立光学环扫成像卫星的姿态模型。针对变转速环扫控制问题,将bang-bang控制与固定时间控制相结合,设计控制策略,并推导固定时间控制律。仿真校验结果表明,所提出的控制方法对于解决光学环扫成像卫星变转速环扫控制问题具备有效性,并具有良好的控制精度。Aiming at the new-type ultra-wide-coverage optical remote sensing satellite based on conical scanning,to realize the effective multi-strip splicing in a fixed time during variable-speed conical scanning imaging,ensure the satellite spins slowly and stably when the camera is on and spins variably and rapidly when the camera is off,and keep the phase angle stable when the camera is turned on next time,a composite control method that combines bang-bang control and fixed-time control is proposed.Firstly,a mathematical description of the variable-speed conical scanning attitude control problem is given.The motion perpendicular to the spin axis and the rotation around the spin axis are described by two primitive rotations respectively,and then the attitude model is established.Aiming at the problem of variable-speed conical scanning control,and combining bang-bang control and fixed-time control,the control strategy and the fixed-time control law are designed.Simulation results are demonstrated to validate the effectiveness and good control precision of the proposed strategy.

关 键 词：光学遥感卫星 变转速环扫 姿态控制 BANG-BANG控制 固定时间控制 

分 类 号：V448.2[航空宇航科学与技术—飞行器设计]