CAJ | 학술논문

常规反射镜平台采用方位/俯仰型两框架结构形式，探测器视轴平行于外框架旋转轴。区别于常规反射镜平台，偏轴反射镜平台不再遵循探测器视轴与外框架旋转轴平行的原则，其视轴角速度具有强耦合和非线性的特点。主要研究了这类偏轴反射镜平台的运动学、动力学建模和视轴稳定机理。首先，采用虚拟整体稳定平台技术推导平台运动学方程，并确定了虚拟平台框架类型的选取原则。在此基础上推导了完整的视轴坐标系动力学模型。然后，对载体运动耦合机制进行了分析并给出了控制框图。最后，对视轴运动特性进行仿真分析。仿真结果表明，该平台在视轴指向、力矩耦合等方面具有不同于常规反射镜平台的特性，且由视轴运动非线性引起的视轴交叉耦合力矩大于惯量耦合力矩。
상규반사경평태채용방위/부앙형량광가결구형식，탐측기시축평행우외광가선전축。구별우상규반사경평태，편축반사경평태불재준순탐측기시축여외광가선전축평행적원칙，기시축각속도구유강우합화비선성적특점。주요연구료저류편축반사경평태적운동학、동역학건모화시축은정궤리。수선，채용허의정체은정평태기술추도평태운동학방정，병학정료허의평태광가류형적선취원칙。재차기출상추도료완정적시축좌표계동역학모형。연후，대재체운동우합궤제진행료분석병급출료공제광도。최후，대시축운동특성진행방진분석。방진결과표명，해평태재시축지향、력구우합등방면구유불동우상규반사경평태적특성，차유시축운동비선성인기적시축교차우합력구대우관량우합력구。
The conventional mirror stabilized platform consists of two-axis azimuth-elevation gimbal axes and the sensor input Line-of-sight (LOS) is always oriented parallel to the outer gimbal axis. Compared with conventional mirror platform, the bias shafting mirror gimbal axis can have an arbitrary orientation with respect to the sensor LOS, and the resulting LOS kinematics are both axis-coupled and non-linear. The primary purpose of this paper is to study LOS kinematics and dynamic modeling of this bias shafting mirror. Firstly, the artificial mass stabilization platform method was proposed to derive LOS kinematics. Meanwhile, the artificial platform gimbal type was determined to derive equations of dynamics. And a complete dynamics model was presented based on LOS coordinate system. Then, the carrier motion coupling was analyzed and system control block diagrams were developed. Lastly, simulation results show that the characteristics of LOS pointing and torque coupling is different between the bias shafting and conventional mirror platform.