| 1. | Variable structure attitude control of a large flexible satellite platform
大型柔性卫星平台的变结构姿态控制 |
| 2. | Infrared imager ’ s mass and the structure dimensions are strictly restricted by the satellite platform , so infrared imager mechanical structure must be packed , agile and firm
由于所搭载的卫星平台对红外成像仪质量和结构尺寸有严格的限制,红外成像仪必须做到结构紧凑,轻巧可靠。 |
| 3. | In the reporting period , chinacast continued to be the group s strategic satellite platform to permeate the education and training service sector in china , with the technological support of other tvh units
Chinacast是集团在中国教育及培训服务领域的卫星业务平台，于回顾期内继续配合宏昌其他部门的支援，担当策略伴角色。 |
| 4. | Optimization of system and mission based on genetic algorithm ( ga ) about geo satellite using mpt has been probed after analysis of orbit dynamics , and building of mathematic model about geo satellite platform and each subsystem
通过geo卫星轨道动力学分析，建立了卫星总体和各子系统的数学模型。采用遗传算法( ga )对mpt用于geo的ot和nssk进行了系统和任务优化计算。 |
| 5. | 2 . to simulate accurate raw data of spaceborne sar , models of satellite with elliptical orbit and targets with rotation of the earth are adopted in the process of calculating between the satellite platform and target
为了模拟得到精确的星载sar原始数据，本文在计算各时刻星载sar平台与目标的距离时，采用了精确的数学模型：其中星载sar平台运动轨迹采用椭圆轨道模型，地球采用椭球体模型。 |
| 6. | Early warning system of missiles is an real - time infrared reconnaissance camera based on satellite platform , it can simutaneously reconnoiter , discriminate and track the enemy missile , then obtain the information about the missile ’ s flight parameter
本文研究的导弹预警系统是基于卫星平台的红外实时传输侦察相机设备,它可以实时侦察、辨别、跟踪敌方飞行导弹,在短时间内获取导弹飞行资料。 |
| 7. | It transmits more than 60 programming services in eight languages on 28 channels and has an audience reach of approximately 360 million people across asia , india and the middle east , using asiasat 1 , asiasat 2 and palapa c2 as its satellite platform
?星电视有限公司以本港为基地，主要透过亚洲?星1号、 2号，以及巴拉巴c2等?星装置，以28条频道和八种语言广播，为亚洲、印度及中东等地区约3 |
| 8. | Built on hughes network s direcpc satellite platform provided by chinacast , teacher . com . cn also draws on the internet and networking strengths of sina . com , as well as the systems integration and software competencies of tvh
继续教育网采用双威网络提供的休斯公司direcpc卫星平台，结合新浪网地面互联网络平台的优势，并利用宏昌科技在系统集成及软件开发上的力量，成功建立了目前在国内最先进的远程教育平台。 |
| 9. | This paper takes hj - 1b satellite and onboard infrared camera scanning mirror as research objects . the influences on respective motion performance caused by the dynamic interactions between them are evaluated . the emphasis is put on the influence of satellite platform ' s attitude motion upon infrared camera scanning mirror ' s continuous scanning motion
本文以hj - 1b卫星和其上的红外相机扫描镜为研究对象,分析两者之间的动力学耦合对各自运动特性的影响情况,并着重分析了卫星平台姿态振动对红外相机扫描机构转动的影响。 |
| 10. | Secondly , the performance of the acousto - optic steering system is deteriorated as a result of the coupling because of nonlinear of quadrant detector and the pointing error introduced by satellite platform vibration . for this problem , this paper introduces the model reference adaptive control system , and presents the perfect model . the model reference adaptive controller is designed to force the output of the acousto - optic steering system following the output of the perfect model to improve the system performance
其次,针对声光偏转系统由于器件的非线性造成的耦合和平台振动造成的指向误差导致系统性能恶化问题,引入了模型参考自适应控制系统,提出了理想的模型,设计了模型参考自适应控制器,强迫性能恶化的声光偏转系统的输出跟随理想模型的输出,使其性能改善,利用超稳定性理论确定自适应参数以保证系统的稳定性。 |
