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| 1 | Recent advances in precision measurement & pointing control of spacecraft显示文摘There exists an increasing need for precision measurement&pointing control and extreme motion stability for current and future space systems,e.g.,Ultra-Performance Spacecraft(UPS).Some notable technologies of realizing Ultra-Pointing(UP)ability have been developed particularly for Ultra-accuracy Ultra-stability Ultra-agility(3 U)spacecraft over recent decades.Usually,Multilevel Compound Pointing Control Techniques(MCPCTs)are deployed in aerospace engineering,especially in astronomical observation satellites and Earth observation satellites.Modern controllers and/or algorithms,which are a key factor of MCPCTs for 3 U spacecraft,especially the jitter phenomena that commonly exist in a UPS Pointing Control System(PCS),have also been effectively used in some UP spacecraft for a number of years.Micro-vibration suppression approaches,however,are often proposed to deal with low-level mechanical vibration or disturbance in the microgravity environment that is common for UPS.This latter approach potentially is one of the most practical UP techniques for 3 U tasks.Some emerging advanced Disturbance-Free Payload(DFP)satellites that exploit the benefits of non-contact actuators have also been reported in the literature.This represents an interesting and highly promising approach for solving some challenging problems in the area.This paper serves as a state-of-the-art review of UP technologies and/or methods which have been developed,mainly over the last decade,specifically for or potentially could be used for 3 U spacecraft pointing control.The problems discussed in this paper are of reference significance to UPS and millisecond optical sensors,which are involved in Gaofeng Project,deep space exploration,manned space flight,and gravitational wave detection. | Lin LI Li YUAN Li WANG Ran ZHENG Yanpeng WU Xiaoyan WANG | 2021 | Chinese Journal of Aeronautics2021，34，10： | 8 |
| 2 | 基于H_∞鲁棒控制的无人驾驶城轨车辆运行姿态研究与仿真显示文摘针对无人驾驶车辆运行过程中存在参数摄动和外部扰动的情况,提出了基于鲁棒H∞控制和PID控制的混合控制方案.通过对无人驾驶城轨车辆驾驶仪运行中的非线性、外界扰动、内部参数摄动等因素的分析,建立了自动驾驶系统的区间控制模型.然后,利用PID控制器实现自动驾驶模态的控制,利用H∞控制器实现参数摄动及外部扰动的抑制,并给出了控制器的具体形式.仿真结果表明所给出的混合控制方案是有效的. | 孟建军 李德仓 胥如迅 李宗刚 | 2011 | 兰州交通大学学报2011，30，6： | 1 |
| 3 | 面向高端装备制造CAE技术的机遇和挑战显示文摘针对高端装备制造在设计、分析、制造、服役和维护等全过程中对CAE的需求,从结构、流体以及流固耦合等3个方面概述CAE技术国内外进展及其面临的机遇和挑战,指出在发展具有能够对装备在极端服役环境下准确的结构、流体和流固耦合CAE分析技术的基础之上,需不断突破面向工程应用的多物理场耦合、跨尺度分析、多学科综合设计、产品性能评估和集成等关键技术,使CAE逐步向支持现代设计和全寿命周期管理转变. | 李跃明 陈刚 许丁 | 2012 | 计算机辅助工程2012，21，1： | 0 |
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