| 充液卫星地面物理仿真方法 |
| 王天舒, 张鹏飞 |
| 清华大学 航天航空学院, 北京 100084 |
| Ground simulations of liquid-filled satellites |
| WANG Tianshu, ZHANG Pengfei |
| School of Aerospace, Tsinghua University, Beijing 100084, China |
摘要:
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| 摘要充液卫星地面物理仿真中, 受重力影响, 无法在气浮台上直接放入液体贮箱进行仿真。为实现充液卫星整星模型的地面物理仿真, 该文提出利用飞轮施加卫星充液贮箱内液体的晃动力矩的方案。该试验方案基于液体晃动的等效单摆模型, 得到了实时获取卫星液体晃动力矩数值, 并通过飞轮实时施加等效晃动力矩, 来等效液体晃动, 进行整星运动仿真。仿真结果及理论分析表明: 考虑采样时间、延时效应、外力矩的影响, 该地面物理仿真方案能够很好地模拟在轨卫星的运动规律; 对飞轮求解方程进行等效处理可以简化飞轮角速度指令计算及相应陀螺力分析。 | |||
| 关键词 ：动力试验,气浮台,液体晃动,地面物理仿真 | |||
| Abstract：Because of earth gravity, liquid fuel tanks cannot be fixed on air-bearing tables to simulate satellite movements in space. This paper describes the use of fly wheels to simulate the sloshing liquid torques for ground simulations. A liquid sloshing model is used to compute the sloshing torques with fly wheels then designed to output the same torques in real time for satellite sloshing liquid simulations. Simulations show that the influences of sampling time, delay, and external moments are well simulated and that an equivalent treatment of the fly wheel dynamics equations can simplify the computations of the fly wheels' angular velocity and the gyro force analysis. | |||
| Key words：dynamic experimentair-bearing tableliquid sloshingground simulation | |||
| 收稿日期: 2013-01-15 出版日期: 2015-11-16 | |||
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| 基金资助:国家自然科学基金资助项目(11172145) | |||
| 作者简介: 王天舒(1969-),男(汉),湖北,教授,E-mail:tswang@tsinghua.edu.cn | |||
| 引用本文: |
| 王天舒, 张鹏飞. 充液卫星地面物理仿真方法[J]. 清华大学学报（自然科学版）, 2015, 55(10): 1130-1134. WANG Tianshu, ZHANG Pengfei. Ground simulations of liquid-filled satellites. Journal of Tsinghua University(Science and Technology), 2015, 55(10): 1130-1134. |
| 链接本文: |
| http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2015.22.013或 http://jst.tsinghuajournals.com/CN/Y2015/V55/I10/1130 |
图表:
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| 图1 充液卫星地面仿真原理图 |
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| 图2 地面仿真系统晃动力矩与充液卫星晃动力矩 |
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| 图3 飞轮角速度角加速度变化曲线 |
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| 图4 地面仿真系统与充液卫星运动角速度随时间变化 |
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| 图5 地面仿真系统与充液卫星运动本体角速度误差 |
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