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	Flow resistance in the transition from dense to dilute granular-fluid flows 期刊论文 OAI收割 GRANULAR MATTER, 2021, 卷号: 23, 期号: 3, 页码: 11 作者: Song, D.; Zhou, G. G. D.; Chen, Q. \| 收藏 \| 浏览/下载：81/0 \| 提交时间：2021/12/15 Granular-fluid flow Debris flow Flow resistance Visco-collisional scaling Coulomb friction
	Modeling and simulation of flexible axially moving arm 会议论文 OAI收割 Xi'an, Shaxi, China, 9 April 2021 到 11 April 2021 作者: Liu RX(刘瑞霞); Zhang J \| 收藏 \| 浏览/下载：29/0 \| 提交时间：2021/11/30 axially moving arm coulomb friction penalty method
	A 3-axis simulator for spacecraft attitude control research (EI CONFERENCE) 会议论文 OAI收割 2010 IEEE International Conference on Information and Automation, ICIA 2010, June 20, 2010 - June 23, 2010, Harbin, Heilongjiang, China 作者: Dai L. 收藏 \| 浏览/下载：30/0 \| 提交时间：2013/03/25 This article presents the details of a new 3-axis simulator for spacecraft attitude control research and simulation. The air bearing allows the test bed to rotate about three axes with tiny friction. The attitude determination system consists of three fibre optical gyros an inclinometer and a magnetometer. The actuator of the system consists of three reaction flywheels and four control moment gyros (CMG). Mathematical models of the sensors and actuators are given to help algorithm design. An extended Kalman filter was designed to provide attitude information for controller. Mathematical simulation results prove the attitude determination system can achieve high precision. A coulomb friction model of reaction wheels is given with experimental results. A friction compensation algorithm was developed to raise the pointing accuracy of the control system. The article also describes the details of the hardware structure. A PD stabilizing controller is implemented to test the validation of the whole control system at last. 2010 IEEE.
	On the interaction of water waves and seabed by the porous medium model 期刊论文 OAI收割 Acta Mechanica Sinica, 1995, 卷号: 11, 期号: 2, 页码: 129-136 作者: Li JC(李家春); Lin M(林缅) 收藏 \| 浏览/下载：1595/175 \| 提交时间：2009/08/03 Porous Medium Wave Attenuation Coulomb Friction Seabed Stability