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| 1 | Progress in control approaches for hypersonic vehicle显示文摘The controller design for hypersonic vehicle is critical and challenging because of the inherent couplings between the propulsion system and the airframe dynamics,as well as the presence of strong flexibility effects.Many researchers have investigated various strategies to mitigate the coupling by means of robust design methods.This paper reviews the recent research efforts to promote the capability of control design for hypersonic vehicle.Methodologies such as robust control,adaptive control,sliding mode control and other hybrid methods have made significant progresses in hypersonic control.Then,the main challenges of control approaches for hypersonic vehicle are systematically analyzed in detail. | DUAN HaiBin LI Pei | 2012 | Science China(Technological Sciences)2012，55，10： | 23 |
| 2 | Evaluation methods for the autonomy of unmanned systems显示文摘Future military and civilian unmanned systems will be extensively used on land,under the sea,in air,and in space.Evaluation of their autonomy is critical to realize the autonomous operation ability of unmanned systems.This paper discussed the basic concepts of autonomy and the significance of autonomy evaluation,and then surveys and describes existing evaluating methods.Based on analyses of key technologies and these technologies' technical readiness levels,a cobweb evaluation model as a universal evaluation model has been used to evaluate unmanned systems.If the technology warps(aspects of autonomy) and wefts(levels of those aspects) of unmanned systems can be determined for the cobweb model,the model can handle the mutual coupling,high dimensions,and diversity of warp lines.This model potentially has wide application in evaluating various unmanned systems. | WANG YueChao Liu JinGuo | 2012 | Chinese Science Bulletin2012，57，26： | 9 |
| 3 | Neural integrated control for a free-floating space robot with suddenly changing parameters显示文摘Because the state of a free-floating space robot model is uncertain and sudden changes in the model parameters might undermine the stability of the system,this paper proposes a control strategy based on a variable structure neural integrated controller.This scheme does not need a precise space robot model,making use of the radial basis function neural network ability approach to learn about an uncertain model.The network weights are adjusted online in real-time.During the early period of the control phase and parameter changes,the variable structure controller compensates for the uncertain model which the neural network could not learn well.It also creates global asymptotic stability for the whole closed-loop system.Simulation results show that the controller can handle bad changeable conditions and has important application value for defense,aerospace and other major security fields. | ZHANG WenHui QI NaiMing MA Jing XIAO AYang | 2011 | Science China(Information Sciences)2011，54，10： | 8 |
| 4 | Iterative spherical simplex unscented particle filter for CNS/Redshift integrated navigation system显示文摘We propose an improved Unscented Particle Filter(UPF) algorithm for the Celestial Navigation System/Redshift(CNS/Redshift) integrated navigation system. The algorithm adopts the iterated spherical simplex unscented transformation rather than the traditional unscented transformation. The navigation performance of the proposed algorithm is assessed by several indexes. Simulation results show that the proposed UPF algorithm has advantages over the traditional UPF algorithm in terms of computation burden, navigation accuracy, and numerical stability. | Kui FU Guangqiong ZHAO Xiajing LI Zhong-Liang TANG Wei HE | 2017 | Science China(Information Sciences)2017，60，4： | 4 |
| 5 | Coordination control strategy based on characteristic model for 3-bearing swivel duct nozzles显示文摘A coordination control strategy is developed for 3-bearing swivel duct(3BSD) nozzles. A 3BSD nozzle's deflection angle and direction are changed through rotations of three revolute pairs. There is a nonlinear relationship between the deflection angle/direction and the rotation angles. The rotation speed of a revolute pair is limited by the power of the actuator. The moment of inertia and the aerodynamic load for each revolute pair are different and time-varying. A high-precision control system of 3BSD nozzles is required for applications on vertical and/or short take-off and landing(V/STOL) aircrafts. Difficulties of coordination control of 3BSD nozzles are distinct travel ranges, speed constraints, time-varying dynamic models, and disturbances. The proposed control strategy is a combination of the characteristic model and the dynamic control allocation method. A dynamic control allocation module is used as the coordination supervisor, which is aware of the kinematic model, the constraints, and the dynamic models of the revolute pairs. Second-order characteristic models are used to represent the dynamic behavior of the revolute pairs. The gradient projection algorithm is modified for parameter estimation. A modified all-coefficient adaptive controller is developed to reject the disturbances. Experimental results of a scaled 3BSD nozzle indicate that the coordination control strategy is effective. | WANG Xiang Yang ZHU Ji Hong YANG Jia Li LIU Kai | 2014 | Science China(Technological Sciences)2014，57，12： | 3 |
| 6 | 可变执行机构智能教学移动机器人系统原型及应用显示文摘提出一种基于BASIC Stamp2的可变执行机构移动教学机器人设计方案.通过在同一机器人底架上设计不同的行走机构,使功能扩展与制造成本之间取得平衡,系统各项功能测试验证了软硬件设计的可行性.结果表明:所建立的系统不仅丰富了传统教学机器人的功能,同时有效降低了重复设计不同运动机构的成本. | 张国亮 王展妮 王田 赵一霖 吴昊 | 2016 | 华侨大学学报(自然科学版)2016，37，1： | 2 |
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