CAJ | 학술논문

三轴气浮台不能直接用于多体卫星的地面物理仿真实验,这是由于部件转动引起台体的质心变化,进而产生重力静不平衡力矩,使仿真过程无法进行,因此需要质心补偿系统对气浮台的重力静不平衡力矩进行补偿.本文通过对多体卫星动力学和气浮台动力学的比较,分析了在重力场中的地面物理仿真系统与真实卫星的动力学特性的不同点,给出地面物理仿真系统能完全模拟真实卫星运动的一致性条件,并进行了数学仿真.当转动附件的质心在转动轴或转动中心上时,气浮台系统可以完全模拟卫星系统的质量特性和力学耦合特性,否则,多体气浮台系统和多体卫星系统的动力学耦合特性不完全一致,需要采取一定的方法进行补偿.
삼축기부태불능직접용우다체위성적지면물리방진실험,저시유우부건전동인기태체적질심변화,진이산생중력정불평형력구,사방진과정무법진행,인차수요질심보상계통대기부태적중력정불평형력구진행보상.본문통과대다체위성동역학화기부태동역학적비교,분석료재중력장중적지면물리방진계통여진실위성적동역학특성적불동점,급출지면물리방진계통능완전모의진실위성운동적일치성조건,병진행료수학방진.당전동부건적질심재전동축혹전동중심상시,기부태계통가이완전모의위성계통적질량특성화역학우합특성,부칙,다체기부태계통화다체위성계통적동역학우합특성불완전일치,수요채취일정적방법진행보상.
Three-axis air-bearing table can not be used in ground physical simulation of multi-body satellite, because when the rotatable appendages move, the alteration of table's centre of mass causes gravity unbalance moment which makes the simulation failure. To solve the problem, the compensation system of centre of mass was developed. This paper researched on the dynamics of multi-body satellite and air-bearing table, analyzed the differences of movement performance between real satellite and ground physical simulation system (GPSS), and developed the consistency condition that the GPSS can simulate the real satellite. When the appendage's centre of mass is superposed with the axis (or centre) of rotation, GPSS can simulate the property and movement performance of real satellite, otherwise, the GPSS will be not consistent with the real multi-body satellite, and more compensation may be applied.