North Information Control Group Co.

Nanjing, China

North Information Control Group Co.

Nanjing, China
SEARCH FILTERS
Time filter
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Tang Z.,Beihang University | Ma H.,Beihang University | Pei Z.,Beihang University | Zhang J.,North Information Control Group Co.
CGNCC 2016 - 2016 IEEE Chinese Guidance, Navigation and Control Conference | Year: 2016

As one of the key technologies of flight simulator, motion cueing algorithm (MCA) plays a great role in regenerating realistic motion and the similar human perception within physical limitations. Although it is the most popular MCAs, classic washout algorithm has some drawbacks, including distortion of the original signal, false cue motions, poor usage of the workspace and wrong human sensation. In order to overcome these problems and minimize human sensation error between the actual flight and simulator while exploiting the platform more efficiently within the motion constraints, this paper proposed a new method which adopt signal error compensators based on fuzzy logic online tuning. And the fuzzy tuning logic controller based on displacement, workspace limitation and the sensed specific force error. The proposed method also contains a non-linear scaling factor to adjust the amplitude of the input signal and uses partial range scaling of the tilt rate limiter to overcome the discontinuous movement. After simulating and analyzing, it shows the superiority of the proposed MCA as it decreases human sensation error to meet high fidelity and exploit platform workspace more efficiently within physical limitations to deliver realistic motion. © 2016 IEEE.


Lyu M.,North Information Control Group Co. | Bo Y.,Nanjing University of Science and Technology
Neurocomputing | Year: 2017

This paper deals with the resilient variance-constrained H ∞ finite-horizon filtering problem for a class of discrete time-varying nonlinear networked system with quantization effects. The nonlinearity enters the system in a probabilistic way that is characterized by a binary sequence with known distribution. The system parameters under investigation are all time-varying and the randomly occurring filter gain variations are modeled by utilizing a random variable obeying prespecified binary distribution which is uncorrelated with other stochastic variables. The nonlinearities and exogenous disturbances we adopt are non-zero mean, which makes the variance analysis become more difficult. Furthermore, the quantization effects are also taken into account to describe the unavoidable constraints imposed on the signal during the transmission in networked systems. Sufficient conditions are established for the finite-horizon filter guaranteeing the constraints imposed on both estimation error variance and H ∞ specification. By means of the recursive linear matrix inequality approach, the algorithm for computing the desired filtering gains is provided. Finally, a numerical illustrative example is used to verify the effectiveness of the proposed design method. © 2017 Elsevier B.V.


Li Y.,Beijing University of Technology | Zheng Z.,North Information Control Group Co. | Chen Y.,Beijing University of Technology | Liu C.,North Information Control Group Co.
International Journal of Antennas and Propagation | Year: 2014

Conventional designs on two-way relay networks mainly focus on the spectral efficiency (SE) rather than energy efficiency (EE). In this paper, we consider a system where two source nodes communicate with each other via an amplify-and-forward (AF) relay node and study the power allocation schemes to maximize EE while ensuring a certain data rate. We propose an optimal energy-efficient power allocation algorithm based on iterative search technique. In addition, a closed-form suboptimal solution is derived with reduced complexity and negligible performance degradation. Numerical results show that the proposed schemes can achieve considerable EE improvement compared with conventional designs. © 2014 Yong Li et al.


Zhang J.,Nanjing University of Science and Technology | Karimi H.R.,University of Agder | Zheng Z.,Harbin Institute of Technology | Lyu M.,North Information Control Group Co. | Bo Y.,Nanjing University of Science and Technology
Mathematical Problems in Engineering | Year: 2013

We deal with the design problem of minimum entropy H∞ filter in terms of linear matrix inequality (LMI) approach for linear continuous-time systems with a state-space model subject to parameter uncertainty that belongs to a given convex bounded polyhedral domain. Given a stable uncertain linear system, our attention is focused on the design of full-order and reduced-order robust minimum entropy H∞ filters, which guarantee the filtering error system to be asymptotically stable and are required to minimize the filtering error system entropy (at s 0 = ∞) and to satisfy a prescribed H∞ disturbance attenuation performance. Sufficient conditions for the existence of desired full-order and reduced-order filters are established in terms of LMIs, respectively, and the corresponding filter synthesis is cast into a convex optimization problem which can be efficiently handled by using standard numerical software. Finally, an illustrative example is provided to show the usefulness and effectiveness of the proposed design method. © 2013 Jie Zhang et al.


Li Y.,Beijing University of Technology | Zheng Z.,North Information Control Group Co. | Zhao M.,Shunde High School | Jin S.,University of Electronic Science and Technology of China | Huang Z.,Beijing University of Technology
Mathematical Problems in Engineering | Year: 2013

Energy efficiency (EE) capacity analysis of the chunk-based resource allocation is presented by considering the minimum spectrum efficiency (SE) constraint in downlink multiuser orthogonal frequency division multiplexing (OFDM) systems. Considering the minimum SE requirement, an optimization problem to maximize EE with limited transmit power is formulated over frequency selective channels. Based on this model, a low-complexity energy efficient resource allocation is proposed. The effects of system parameters, such as the average channel gain-to-noise ratio (CNR) and the number of subcarriers per chunk, are evaluated. Numerical results demonstrate the effectiveness of the proposed scheme for balancing the EE and SE. © 2013 Yong Li et al.


Chu H.,Nantong University | Mao R.,North Information Control Group Co. | Chen J.-X.,Nantong University
Applied Computational Electromagnetics Society Journal | Year: 2015

Diplexers based on dual-mode Substrate Integrated Waveguide (SIW) cavities are proposed and implemented. The dual-mode cavities not only act as a resonator for both Rx and Tx channels, but also as the interconnect between these two channels which help to realize the isolation. The dual-mode cavities resonating at TE201 and TE103 modes in our design show several advantages than those dual-mode cavities operating at TE201 and TE301 modes. Single-mode cavities are cascaded with the dual-mode cavity to realize the two-order filters for Rx and Tx channels. Two design examples are presented with a normal printed circuit board process and verified by experiments.


Zhang J.,Nanjing University of Science and Technology | Lyu M.,North Information Control Group Co. | Karimi H.R.,University of Agder | Guo P.,Nanjing University of Science and Technology | Bo Y.,Nanjing University of Science and Technology
The Scientific World Journal | Year: 2014

The robust H∞ filtering problem is investigated for a class of complex network systems which has stochastic packet dropouts and time delays, combined with disturbance inputs. The packet dropout phenomenon occurs in a random way and the occurrence probability for each measurement output node is governed by an individual random variable. Besides, the time delay phenomenon is assumed to occur in a nonlinear vector-valued function. We aim to design a filter such that the estimation error converges to zero exponentially in the mean square, while the disturbance rejection attenuation is constrained to a given level by means of the H∞ performance index. By constructing the proper Lyapunov-Krasovskii functional, we acquire sufficient conditions to guarantee the stability of the state detection observer for the discrete systems, and the observer gain is also derived by solving linear matrix inequalities. Finally, an illustrative example is provided to show the usefulness and effectiveness of the proposed design method. © 2014 Jie Zhang et al.


Zhang J.,Nanjing University of Science and Technology | Lyu M.,North Information Control Group Co. | Karimi H.R.,University of Agder | Bo Y.,Nanjing University of Science and Technology
Mathematical Problems in Engineering | Year: 2013

This paper is concerned with the network-based fault detection problem for a class of nonlinear discrete-time networked control systems with multiple communication delays and bounded disturbances. First, a sliding mode based nonlinear discrete observer is proposed. Then the sufficient conditions of sliding motion asymptotical stability are derived by means of the linear matrix inequality (LMI) approach on a designed surface. Then a discrete-time sliding-mode fault observer is designed that is capable of guaranteeing the discrete-time sliding-mode reaching condition of the specified sliding surface. Finally, an illustrative example is provided to show the usefulness and effectiveness of the proposed design method. © 2013 Jie Zhang et al.


Li Y.,Beijing University of Technology | Li Y.,North Information Control Group Co. | Zheng Z.,Beijing University of Technology | Zheng Z.,North Information Control Group Co.
Electronics Letters | Year: 2014

A joint relay selection and power allocation scheme to maximise energy efficiency with restriction on the minimum spectral efficiency requirement for an amplify-and-forward two-hop relay network is presented. A closed-form solution of the low-complexity power allocation for such a system has been derived, which is easy to implement and has the potential to find wide application in green communications. Some numerical examples are provided to validate the analysis. © The Institution of Engineering and Technology 2014.


Chen Y.,Beijing University of Technology | Zheng Z.,North Information Control Group Co. | Hou Y.,Beijing University of Technology | Li Y.,Beijing University of Technology
Mathematical Problems in Engineering | Year: 2014

Conventional designs on OFDM-based underlay cognitive radio (CR) networks mainly focus on interference avoidance and spectral efficiency (SE) improvement. As green radio becomes increasingly important, this paper investigates energy efficient power allocation. Our aim is to maximize energy efficiency (EE), subject to the constraints on the total transmit power, the peak interference power, and the minimum data rate requirement. We first analyze the relationship between SE and EE and solve this optimization problem with the help of bisection search technique. However, the accuracy of the power allocation solution is dependent on the number of iterations. In order to achieve the exact optimal solution, a new energy efficient power allocation scheme is proposed to balance the tradeoff between SE and EE. Simulation results are provided to demonstrate the effectiveness of the proposed schemes. © 2014 Yunli Chen et al.

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