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for quadrotor UAVs in the high hover. In this time, the flight attitude of quadrotor UAVs is changed by the artificial force. This force is equivalent to uncertain disturbance. The flight effect with the proposed... J. Cent. South Univ. (2018) 25: 616-631 DOI: https://doi.org/10.1007/s11771-018-3765-0 An adaptive backstepping sliding mode method for flight attitude of quadrotor UAVs Jiang Xue-ying(姜雪莹)1, Su......
Attitude controller for reentry vehicles using state-dependent Riccati equation methodXIE Dao-cheng(谢道成), WANG Zhong-wei(王中伟), ZHANG Wei-hua(张为华)(College of Aerospace Science and Engineering, National University of Defense Technology,Changsha 410073, China)Abstract:To get better tracking performance of attitude command over the reentry phase of vehicles, the use of state-dependent Riccati......
in the differential algebraic framework was proposed for attitude control of a heavy lift launch vehicle (HLLV). By using purely mathematical transformations, the decoupled input-output representations... of Lyapunov’s indirect method. The convincing numerical simulations indicate that the proposed control scheme is successful in achieving high performance in the presence of parametric perturbations......
technology, a closed-loop charging-discharging air circuit longitudinal interconnected air suspension system with high and low pressure chambers was proposed. In order to relieve "over- charging", "over-discharging" and oscillation phenomena which exist during height adjustment process, a PID height control strategy was applied to the new charging-discharging system. Besides, the body attitude......
accuracy. The results show that this attitude accuracy is high, which indicates that the real-time performance and the precision of the navigation system can meet the practical demand. Key words: attitude... of the underwater cleaning robot’s localization, an innovative vision-inertial navigation system was put forward. By recognizing pipe line in Canny/Hough and establishing robot’s spatial model, the attitude angles......
; 文献标志码:A 文章编号:1672-7207(2011)S1-0483-03 A attitude measurement method of nine-accelerometer WANG Xiao-li, ZHOU Xun... of nine- accelerometer configuration scheme was designed which is easy to engineering realization. The attitude measurement method of this accelerometer configuration scheme was researched. Key words......
successfully applied to the orbital attitude control engine of the spaceship and the satellite[8-11]. With the requirement for the improvement of high speed and stability on the advanced aerospace...Morphology and structure of high temperature MoSi2 coating on niobium XIAO Lai-rong(肖来荣), YI Dan-qing(易丹青), YIN Lei(殷 磊), CAI hi-gang(蔡志刚) (College of Materials Science and Engineering......
vehicle, spacecraft maneuvers control subject to propellant engine modes, three-axis detumbling mode control approach, high-precision full quaternion based finite-time cascade attitude control strategy and finally high-precision three-axis detumbling along with pointing attitude control strategy for a class of complicated space systems are a number of investigations presented by MAZINAN [6-10]. YEH......
A Lyapunov-based three-axis attitude intelligent control approach for unmanned aerial vehicleA.H. Mazinan(Department of Control Engineering, Faculty of Electrical Engineering, South Tehran Branch,Islamic Azad University (IAU), No. 209, North Iranshahr St., P.O. Box 11365/4435, Tehran, Iran)Abstract:A novel Lyapunov-based three-axis attitude intelligent control approach via allocation scheme......
;Schematic diagram of bird attitude changes 图4 线圈姿态旋转示意图 Fig. 4 Sketch of coil attitude changes 已知在飞行探测的过程中,吊舱的翻滚角α及俯仰角β均在±90°之间变化,因此满足翻滚角α及俯仰角β的余弦值恒为正值.为了便于分析,本工作采用固定于吊舱中心点处的激光高度计测量吊舱高度的变化... Influence of frequency-conductivity products on coil separation (a) and system height (b) with specific attitude angles after correction 已知不变量对方向误差不敏感,但在校正位置误差时,同样基于重叠偶极子模型,采用3种线圈架构下二次场及不变量之间满足的......
