中国科学院机构知识库网格系统: 检索

Explicit Integration Algorithm of the Bounding Surface Model Based on Swell-Shrink Rules for Cyclic Behaviors of Clay 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS, 2020, 卷号: 17, 期号: 9, 页码: 25
作者: Li, Jian; Chen, Shanxiong; Jiang, Lingfa; Dai, Zhangjun

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收藏 | 浏览/下载：29/0 | 提交时间：2021/05/25

Explicit sub-stepping integration error control algorithm bounding surface model swell-shrink rules

Time optimal feedrate generation with confined tracking error based on linear programming 期刊论文 OAI收割
JOURNAL OF SYSTEMS SCIENCE & COMPLEXITY, 2015, 卷号: 28, 期号: 1, 页码: 80-95
作者: Guo Jianxin; Zhang Qiang; Gao XiaoShan; Li Hongbo

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收藏 | 浏览/下载：33/0 | 提交时间：2021/01/14

CNC MACHINES NURBS INTERPOLATOR CHORD ERROR ALGORITHM PATHS JERK ACCELERATION OPTIMIZATION CONSTRAINTS TOOLS CNC machining dynamics linear programming optimal control time optimal feedrate planning tracking error

Trajectory tacking control of a quad-rotor based on active disturbance rejection control (EI CONFERENCE) 会议论文 OAI收割
2012 IEEE International Conference on Automation and Logistics, ICAL 2012, August 15, 2012 - August 17, 2012, Zhengzhou, China
Gong X.; Tian Y.; Bai Y.; Zhao C.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

The objective of this paper is to deal with a trajectory tracking of a Quad-rotor unmanned aerial vehicle (UAV). For the model uncertainty the external disturbance and the coupling factor are considered an active disturbance rejection control (ADRC) algorithm is introduced into the designing procedure. The aircraft dynamic model is proposed in this article based on which the closed-loop control system is divided into four independent channels with the coupling factor compensated by the extended state observer (ESO). The nonlinear state error feedback (NLSEF) algorithm is designed in each channel to improve the closed-loop dynamics. In this article the ADRC controller is expressed in the discrete form. And finally the simulation results show that the proposed control algorithm achieves a favourable tracking performance. 2012 IEEE.

PID control of glucose concentration in subjects with type 1 diabetes based on a simplified model: An in silico trial (EI CONFERENCE) 会议论文 OAI收割
10th World Congress on Intelligent Control and Automation, WCICA 2012, July 6, 2012 - July 8, 2012, Beijing, China
作者: Yu L.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

An artificial pancreas system (APS) mimics the function of a real pancreas through monitoring a diabetic's blood glucose and administering the right dose of insulin via an automatic control loop. It is hailed as a promising cure of diabetes though this technology is still years away from commercial use due to a few technological bottlenecks. The simulation model of insulin-glucose metabolism of type 1 diabetes mellitus (T1DM) is an essential part of APS. In order to simplify the parameter identification task so that the model can be implemented electronically with ease this paper presents a simplified model based on Routh approximation model reduction method. The results show that the approximation error between the simplified model and the original model is so small that can be neglected. Based on the simplified model a PID controller is designed to maintain normoglycemia (90mg/dl) in subjects with T1DM. The in silico simulation results show that the glucose concentration is controlled well the risk of hyperglycemia and hypoglycemia is reduced a lot. This suggests that the simplified model describes the insulin-glucose metabolism process accurately and the PID control algorithm is well-suitable to guide the further development of an APS. 2012 IEEE.

The research of control strategy on AOD furnace tilting system (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Logistics Systems and Intelligent Management, ICLSIM 2010, January 9, 2010 - January 10, 2010, Harbin, China
Ma H. T.; You W.; Chen T.

收藏 | 浏览/下载：16/0 | 提交时间：2013/03/25

In view of the low speed the heavy load reversing the frequently brake the intense impact characteristics of AOD furnace tilting system The double closed-loop with feedforward is used. Position regulator and speed regulator use PID algorithm.And the speed loop is designed based on vector control. This control system was simulated by MATLAB Simulink software. The simulation result showed: Adjustment time is 8s the position steady-state error is 0 so it has achieved the demanded target of 0.12 radian static error fully. 2010 IEEE.

adaptive voice stream multicast over low-power wireless networks 会议论文 OAI收割
31st IEEE Real-Time Systems Symposium, RTSS 2010, San Diego, CA, 40850
Liqun Li; Guoliang Xing; Qi Han; Limin Sun

收藏 | 浏览/下载：21/0 | 提交时间：2011/03/31

ad hoc voice communication adaptive voice stream multicast coding redundancy ratio coordination rules disaster response distributed admission control algorithm forward error correction forwarder selection low-power wireless networks security surveillance tree-based opportunistic routing protocol voice quality ad hoc networks audio streaming forward error correction multicast communication routing protocols telecommunication congestion control voice communication

Novel method for optimizing polishing tool-path in CCOS based on weighted-iterative algorithm (EI CONFERENCE) 会议论文 OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
作者: Zhang X.-J.; Wang X.; Wang X.; Wang X.; Wang X.-K.

收藏 | 浏览/下载：39/0 | 提交时间：2013/03/25

In Computer Controlled Optical Surfacing (CCOS) polishing tool-path is the base of solving other control parameters such as dwell time. In order to improve the fabrication results of polishing off-axis aspheric a novel method to optimize the tool-path is discussed in this paper. The optimizing method named weighted-iterative algorithm is according to the balance principle of the particle system. The power factor of each dwell point represents the requirement of dwell density. Considering the factors which influence the polishing result the power factors cosist of three elements include constant error distribution and dwell distance of workpiece edge. The tool-path is solved by numerical iterative method. In the end an error data is simulated with actual parameters using the matrix-based algorithm with two different tool-paths. The one is X-Y uniform spacing model and the other one is to optimize it based on the first. The comparison shows that the results of the optimized one are much better than traditional one especially the rms convergence rate. Theory of the algorithm is simple and exercisable and it satisfies practical requirement as well. 2009 SPIE.

a sentence generation algorithm for testing grammars 会议论文 OAI收割
IEEE 33rd International Computer Software and Applications Conference, Seattle, WA, JUL 20-24,
Zheng Lixiao; Wu Duanyi

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收藏 | 浏览/下载：27/0 | 提交时间：2011/03/20

by-now folklore sentence generation algorithm complicated derivation structure context-free grammar testing error location grammar debugging length control mechanism user validation context-free grammars program debugging program testing program verification

Study on chromaticity balance for LED exposure system (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2007 - Laser, Ultraviolet, and Terahertz Technology, September 9, 2007 - September 12, 2007, Beijing, China
作者: Meng Z.; Meng Z.

收藏 | 浏览/下载：16/0 | 提交时间：2013/03/25

A standard white light compounding algorithm based on combination of CCD illumination acquisition with computer control is presented for LEDs. The computer adjust and control the working current of LEDs by using three-color LEDs illumination acquired by CCD camera achieved chromaticity coordinates error between compounded white light and standard white light D65 less than the threshold beforehand setted by this technique then acquiring needed standard white light. Compounded white light meet the chromaticity error demand that is able to be changed at the same time the CCD illumination acquisition system is eliminated. The proposed algorithm improved the light energy utilization efficiency of LED and eliminated the offset of central wavelength and chromaticity coordinates due to work current change of LEDs. Experimental results show that the proposed algorithm achieved lesser chromaticity error uv=0.001 relative to standard white light D65 enhanced chromaticity uniformity of illumination field.

Study on chroma balance based on grating spectrometer for LED (EI CONFERENCE) 会议论文 OAI收割
Light-Emitting Diode Materials and Devices II, November 12, 2007 - November 14, 2007, Beijing, China
作者: Meng Z.; Meng Z.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

A standard white light compounding algorithm based on combination of choma coordinates acquisition system with computer working current control system is presented for three-color LED. The chroma coordinates acquisition system consist of grating spectrometer and integrating sphere. The computer adjust and control the working current of three-color LED then achieved chroma coordinates error between the compounded white light and standard white light D65 until the chroma coordinates is less than the threshold beforehand set by this technique. The compounded white light meet the chroma error demanded that is able to be changed at the same time the chroma coordinates acquisition system and the working current control system are eliminated. The proposed algorithm the offset of central wavelength and the change of chroma coordinates due to working current variety for LEDs. Experimental results show that the proposed algorithm achieved lesser chroma error uv=0.001 relative to standard white light D65 enhanced chroma uniformity of illumination field.