中国科学院机构知识库网格系统: 检索

Observer-based Multirate Feedback Control Design for Two-time-scale System 期刊论文 OAI收割
International Journal of Automation and Computing, 2021, 卷号: 18, 期号: 6, 页码: 1007-1016
作者: Ravindra Munje

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收藏 | 浏览/下载：17/0 | 提交时间：2021/11/26

Feedback control multirate sampling sequential observer two-stage design two-time-scale system

Signal difference-based deadband H-infinity control approach for networked control systems with limited resources 期刊论文 OAI收割
JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS, 2015, 卷号: 26, 期号: 3, 页码: 573-583
作者: Liu YY(刘英英); Che WW(车伟伟); Chu YK(褚云凯)

收藏 | 浏览/下载：43/0 | 提交时间：2015/08/24

networked control system (NCS) H-infinity control variable network-induced delay variable sampling interval transmission deadband

永磁同步交流伺服驱动关键技术研究 学位论文 OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2010
作者: 秦晓飞

收藏 | 浏览/下载：112/0 | 提交时间：2015/09/02

交流伺服系统矢量控制自抗扰控制 M/T测速算法电流采样电压漂移 alternating-current servo system vector control active disturbance rejection control M/T speed detection method current sampling voltage drift

Design of driving circuit for binocular CCD image system (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, April 26, 2010 - April 29, 2010, Dalian, China
作者: Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：42/0 | 提交时间：2013/03/25

The paper designs a driving circuit of high sensitive wide dynamic and high signal-to-noise ratio for binocular CCD imaging system which adopts a Dalsa-made high resolution full-frame 33-mega pixels area CCD FTF5066M. Inner structure and driving timing of the FTF5066M sensor are presented. Field Programmable Gate Array (FPGA) is used as the main device to accomplish the timing design of the circuits and power driver control of the two sensors. By using the Correlated Double Sampling (CDS) technique the video noise is reduced and the SNR of the system is increased. A 12- bit A/D converter is used to improve the image quality. The output rate of the imaging system designed with integrated chip can reach to 1.3 frames per second through bi-channel. For its good performance low power consumption and small volume the driving system can be applied to aeronautics and astronautics field. With a further improvement a maximum data output rate of 2.7 frames per second can be reached through all the eight channels of the two CCDs. 2010 Copyright SPIE - The International Society for Optical Engineering.

Driving and image enhancement for CCD sensing image system (EI CONFERENCE) 会议论文 OAI收割
2010 3rd IEEE International Conference on Computer Science and Information Technology, ICCSIT 2010, July 9, 2010 - July 11, 2010, Chengdu, China
Zhang M.; Ren J.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

The paper designs a driving circuit of high sensitive wide dynamic for CCD sensing imaging system which adopts a Dalsa-made high resolution full-frame 33-mega pixels area CCD FTF5066M. Field Programmable Gate Array (FPGA) is used as the main device to accomplish the timing design of the circuits and power driver control of the sensor. By using the Correlated Double Sampling (CDS) technique the video noise is reduced and the SNR of the system is increased. The output rate of the imaging system designed with integrated chip can reach to 1.3 frames per second through bi-channel output. We use the histogram specification to adjust the brightness of the captured image. And then use the median filtering to suppress the noise. The traditional gray mean gradient (GMG) and the objective evaluation method based on Human Visual System (HVS) used to verify the effect of image enhancement. 2010 IEEE.

DOUBLE-STEPPED ADAPTIVE CONTROL FOR HYBRID SYSTEMS WITH UNKNOWN MARKOV JUMPS AND STOCHASTIC NOISES 期刊论文 OAI收割
ESAIM-CONTROL OPTIMISATION AND CALCULUS OF VARIATIONS, 2009, 卷号: 15, 期号: 4, 页码: 969-993
作者: Tan, Shuping

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收藏 | 浏览/下载：20/0 | 提交时间：2018/07/30

Sampling control system Markov jump parameter adaptive control double-step approach stochastic noise least matching error estimation

网络控制系统控制器设计和稳定性分析 学位论文 OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2009
作者: 郭新兰

收藏 | 浏览/下载：60/0 | 提交时间：2015/09/02

网络控制系统随机延时马尔可夫链熵随机稳定变周期采样模型李亚普诺夫函数线性矩阵不等式 Network control system random delay entropy stochastic stability variable-period sampling model linear matrix inequality markov chains Lyapunov function

Application of multi-sensors parallel fusion system in photoelectric tracing (EI CONFERENCE) 会议论文 OAI收割
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, November 16, 2008 - November 19, 2008, Beijing, China
Cheng G.-Y.; Cai S.; Gao H.-B.; Zhang S.-M.; Qiao Y.-F.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

To solve the real-time and reliability problem of tracking servo-control system in optoelectronic theodolite a multisensors parallel processing system was proposed. Misdistances of three different wavebands were imported into system and then prediction was done in DSP1 to get the actual position information. Data fusion was accomplished in PPGA imported by multi channel buffer serial port. The compound position information was used to control the theodolite. The results were compared with external guide data in DSP2 to implement correction of above calculation and then were imported to epistemic machine through PXI interface. The simulation experiment of each calculation unit showed that this system could solve the real-time problem of feature level data fusion. The simulation result showed that the system can satisfy the real-time requirement with 1.25ms in theodolite with three imaging systems while sampling frequency of photoelectric encoder was 800 Hz. 2009 SPIE.

A high-accuracy parameter estimation algorithm for jointless Frequency-shift track circuit (EI CONFERENCE) 会议论文 OAI收割
ISECS International Colloquium on Computing, Communication, Control, and Management, CCCM 2008, August 3, 2008 - August 4, 2008, Guangzhou, China
作者: Zheng X.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

FSK (Frequency Shift keying) signal which has advantages of narrow-bandwidth strong anti-interference ability long transmission distance and so on is used in jointless Frequency-shift track circuit to send different kinds of control signals. However as FSK is non-linearly modulated parameter estimation with high accuracy is hard to realize. Based on the spectrum analysis complement with time-frequency distribution a highaccuracy FSK signal parameter estimation algorithm is put forward in this paper. According to the signal characteristics under-sampling and ZFFT are used to improve the accuracy of spectrum analysis and the base frequency resolution meets system requirement of 0.02Hz. Wigner-Ville distribution has an excellent time-frequency concentration while serious cross-term interference at the same time. Through the design of kernel function the cross-terms are almost suppressed and the upper/down side frequency resolution meets the system requirement of 0.2Hz. The effectivities of all the methods mentioned above have been proved by MATLAB simulation which pave a solid way for the development of high-accuracy FSK signal parameter estimation devices. 2008 IEEE.

Adaptive sliding mode control for airborne Opto-Electronic platform servo system (EI CONFERENCE) 会议论文 OAI收割
7th International Conference on Machine Learning and Cybernetics, ICMLC, July 12, 2008 - July 15, 2008, Kunming, China
Wang C.-X.; Liu J.-H.; Shen H.-H.; Dai M.

收藏 | 浏览/下载：21/0 | 提交时间：2013/03/25

The novel presents an adaptive reaching law sliding mode controller to slove a class of uncertain systems.The Airborne Opto-Electronic Platform sliding model is employed to represent a class of complex uncertain system. The control is based on reaching law control. Discrete time implementation of the sliding mode control strategy is considered in the paper since it is more appropriate for practical applications. It is shown that the robustness of the sliding mode control method is constrained by sampling time. Design of the adaptive reaching law based on a discrete expotential reaching law concept is given which to design a new sliding mode controller based on Lyapunov stability theory. The global asymptotic stability is guaranteed. An example with simulation results is given to illustrate the effectiveness of the proposed method. 2008 IEEE.