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浏览/检索结果: 共3条，第1-3条 帮助 限定条件 内容类型：会议论文    专题：长春光学精密机械与物理研究所    第一署名单位    第一作者单位    通讯作者单位     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Longitudinal control law design and simulation of fixed-wing UAV (EI CONFERENCE) 会议论文 2012 International Conference on Measurement, Instrumentation and Automation, ICMIA 2012, September 15, 2012 - September 16, 2012, Guangzhou, China Duan Z. 收藏  |  浏览/下载：19/0  |  提交时间：2013/03/25 Taken some fixed-wing UAV as the study object  the aircraft movement was broken down into the longitudinal movement and lateral movement according to the linearized small perturbation principle  the longitudinal control law design method was discussed using root locus which belonged to classical control theory. The six degrees of freedom nonlinear model simulation result shows that: the control parameters designed are reasonable  the simulation profile is fully consistent with the setting profile  the control effect of pitch angle loop and altitude loop meets with the indices requirements  the method is mature and reliable  easy to realize in engineering. (2013) Trans Tech Publications  Switzerland.   Roughness analysis of optical surfaces by X-ray scattering (EI CONFERENCE) 会议论文 2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China Meng Y.; Chen B.; Chen C. 收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25 A grazing incidence x-ray scattering (XRS) method  Order perturbation theory (FOPT)  is stated briefly and an experimental facility based on an improved X-ray diffraction has been introduced  which can work with high performance. The x-ray scattering distributions of two super smooth silicon samples measured at the incidence angle 0.2 degree  as the x-ray wavelength is 0.154 nm  have been given and analyzed by the FOPT to give information about the surface profiles. As a comparison  the root mean square (RMS) surface roughness  grey-scale maps and one-dimensional power spectral density (1D PSD) have been derived from the atomic-force microscope (AFM) data. The results evaluated by FOPT are in good agreement with that of AFM  which indicates that x-ray scattering method is a practical characterization for the investigation of super smooth surfaces. 2011 IEEE.   Adaptive backstepping control of a dual-manipulator cooperative system handling a flexible payload (EI CONFERENCE) 会议论文 2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China Liu M.; Li Y.; Tang Z.; Chen C. 收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25 Two manipulators handling a flexible payload are studied based on adaptive backstepping control theory. Considering the complexity of the dynamic model  the obtained model is divided into a slow subsystem describing the large rigid motion and a fast subsystem expressing the elastic vibration by singular perturbation theory. A cooperative controller is designed based on adaptive backstepping control. The slow subsystem can complete system trajectory tracking performance. The fast subsystem can suppress the elastic vibration of the system. Stability of the system is proved by using Lyapunov stability theory. The validity of the proposed scheme is demonstrated by simulations. 2010 IEEE.