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Model Repair for Markov Decision Processes

Model Repair for Markov Decision Processes

引用

Theoretical Aspects of Software engineering (TASE)

作者： Taolue Chen Ernst Moritz Hahn Tingting Han Marta Kwiatkowska Hongyang Qu Lijun Zhang Department of Computer Scienc University of Oxford UK Department of Automatic Control and Systems Engineering University of Sheffield UK State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences China

Markov decision processes (MDPs) are often used for modelling distributed systems with probabilistic failure or randomisation. We consider the problem of model repair for MDPs defined as follows: if the MDP fails to satisfy a property, we aim to find new values for the transition probabilities so that the property is guaranteed to hold, while at the same time the cost of repair is minimised. Because solving the MDP repair problem exactly is infeasible, in this paper we focus on approximate solution methods. We first formulate a region-based approach, which yields an interval in which the minimal repair cost is contained. As an alternative, we also consider sampling based approaches, which are faster but unable to provide lower bounds on the repair cost. We have integrated both methods into the probabilistic model checker PRISM and demonstrated their usefulness in practice using a computer virus case study.

关键词： Maintenance engineering Markov processes Computational modeling Probabilistic logic Cost accounting Proposals

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Delay-dependent ℋ∞ filter design for discrete-time fuzzy descriptor system

Delay-dependent ℋ∞ filter design for discrete-time fuzzy d...

引用

Chinese control Conference (CCC)

作者： Chunsong Han Tong Peng Huiyan Zhang Qingshuang Zeng School of Computer and Control Engineering Qiqihar University Qiqihar Heilongjiang CN Hypervelocity Impact Research Center Harbin Institute of Technology Harbin Heilongjiang CN Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin Heilongjiang CN

In this paper, the ℋ ∞ filtering problem for T-S fuzzy descriptor system with interval time-delay is investigated. By using of Lyapunov-Krasovskii theorem combination with free-weighting matrix technique, interval delay-dependent sufficient condition for the existence of ℋ ∞ filtering is established in terms of linear matrix inequality (LMI), which ensures the considered system to be regular, causal and stable with a prescribed ℋ ∞ performance index. The suitable filter is derived through the feasible solution of LMIs. A numerical example is given to show the effectiveness of the obtained results.

关键词： Linear matrix inequalities Performance analysis Delays Vectors Fuzzy systems Power system stability Educational institutions

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A Direct Wideband Direction of Arrival Estimation under Compressive Sensing

A Direct Wideband Direction of Arrival Estimation under Comp...

引用

IEEE Internatonal Conference on Mobile Adhoc and Sensor Systems (MASS)

作者： Kai Yu Ming Yin Jian Luo Ming Bao Yu-Hen Hu Zhi Wang Department of Control Science and Engineering Zhejiang University Hangzhou Zhejiang China Institute of Information and Control Hangzhou Dianzi University Hangzhou Zhejiang China Institute of Acoustics Chinese Academy of Sciences Beijing China Department of Electrical and Computer Engineering University of Wisconsin-Madison Madison WI U.S.A

Compressive Sensing (CS) theory witnesses great breakthrough in signal acquisition and processing. In this paper we focus on the application of direction of arrival (DoA) and proposed a compressive sensing based direct DoA estimation framework (CS-DDoA) for wireless sensor array network. Unlike the former signal reconstruction-processing scheme, CS-DDoA utilize the spatial and spectral sparsity of target, then reformulates them into a global problems. It eliminates the error propagation between this two independent procedure and provides a enhanced DoA performance. Under this framework, array data transmission volume can be greatly reduce without distinct performance decline, which has great potential for wireless sensor array network with limited resources. At last theoretical analysis and prototype system are provided to validate this framework.

关键词： Arrays Wireless sensor networks Direction-of-arrival estimation Wireless communication Estimation Vectors Sparse matrices

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Stability and stabilization of nonlinear 2D markovian jump systems with applications ?

Stability and stabilization of nonlinear 2D markovian jump s...

引用

11th IFAC International Workshop on Adaptation and Learning in control and Signal Processing, ALCOSP 2013

作者： Emelianova, Julia Pakshin, Pavel Galkowski, Krzysztof Rogers, Eric Arzamas Polytechnic Institute of R.E. Alekseev Nizhny Novgorod State Technical University 19 Kalinina Street Arzamas 607227 Russia Institute of Control and Computation Engineering University of Zielona Gora ul. Podgorna 50 65-246 Zielona Gora Poland School of Electronics and Computer Science University of Southampton Southampton SO17 1BJ United Kingdom

ISBN: (纸本)9783902823373

This paper develops a vector Lyapunov function based approach to the stability of continuous and discrete 2D nonlinear systems with Markovian jumps. Nonlinear continuous- time 2D systems described by a Roesser model and nonlinear discrete-time repetitive process with Markovian jumps are considered, for which global asymptotic stability in the mean square is defined and suficient conditions for the existence of this property obtained in terms of stochastic vector Lyapunov functions. These conditions are then applied to iterative learning control design for a set of linear systems with jumps that are controlled over a network. The resulting networked ILC model has the form of repetitive process with a Markovian random structure. The ILC convergence problem is reduced to a stochastic stabilization problem, where the use of a stochastic Lyapunov function as a vector of quadratic forms results in control law design algorithms that can be computed using linear matrix inequalities. © IFAC.

关键词： Stabilization

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Target-Tracking control Design for a Robotic Fish with Caudal Fin

Target-Tracking Control Design for a Robotic Fish with Cauda...

引用

第三十二届中国控制会议

作者： Songlin Chen Jianxun Wang Xiaobo Tan Control and Simulation Center Harbin Institute of Technology Smart Microsystems Laboratory Department of Electrical and Computer EngineeringMichigan State UniversityEast LansingMI 48824USA

ISBN: (纸本)9781479900305

In this paper we propose a novel target-tracking control scheme for a carangiform robotic fish based on a faithful dynamic model that combines rigid-body dynamics with Lighthill's large-amplitnde elongated-body *** first average the dynamic model under periodic tail-actuation,which results in an average model with tail-beat patterns(bias,frequency,and amplitude) as new control inputs that axe nonlinearly *** introducing two new state variables,the orientation angle error and the distance between the robotic fish body and the target location,we derived the dynamic equations for these variables, which are then used in backstepping-based controller design.A hybrid controller is proposed,where the switching is determined by whether the orientation error is above a threshold *** Lyapunov analysis,we show that the trajectory of the robotic fish will converge to the target point if the given condition is ***,the effectiveness of the proposed control strategy is demonstrated through simulation results.

关键词： Robotic fish Target-Tracking Backstepping Nonlinear Underactuated

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Sampled-data Periodic Predictor Feedback for Linear Systems with Input Delay

Sampled-data Periodic Predictor Feedback for Linear Systems ...

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第三十二届中国控制会议

作者： Bin Zhou Qian Sang Zongli Lin Center for Control Theory and Guidance Technology Harbin Institute of Technology Charles LBrown Department of Electrical and Computer Engineering University of VirginiaCharlottesvilleVA 22904-4743USA

ISBN: (纸本)9781479900305

In this paper we propose sampled-data periodic predictor feedback controllers for linear systems with input *** any size of input delay and any prescribed sampling period,an explicit sampled-data periodic predictor feedback controller is constructed and shown to be able to stabilize the given delay *** a controller utilizes only the state information at the latest sampling instant and the control inputs at some past sampling *** the condition that the open-loop system is not exponentially unstable(but maybe polynomially unstable),a truncated version of the sampled-data periodic predictor feedback controller is also proposed,which is a memoryless controller that needs only the state at the latest sampling *** of the closed-loop system under the truncated sampled-data periodic predictor feedback controller is *** numerical examples are given to illustrate the effectiveness of the proposed designs.

关键词： Input delay systems sampled-date control periodic controller predictor feedback truncated predictor feedback

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Assessing Cyber-threats Situation for Electric Power Information Networks

Assessing Cyber-threats Situation for Electric Power Informa...

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International Conference on Natural Computation (ICNC)

作者： Yufei Wang Jing Wang Zhibo Xu Huan Li Information & Communication Department China Electric Power Research Institute Beijing China School of Control and Computer Engineering North China Electric Power University Beijing China

ISBN: (纸本)9781467347129

The Cyber-threats Situation Assessment (CSA) could show the macro security situation of Electric Power Information Networks (EPIN) in real time. Researching the efficient CSA method will be helpful to enhance the security protection ability of EPIN. A hierarchical CSA method, which is based on both the Analytic Hierarchy Process (AHP) and the Grey Clustering Algorithm (GCA), is proposed and implemented. The Cyber-threats Situation Value (CSV) is used to describe the cyber-threats situation. The higher CSV shows worse security situation, on the contrary, the lower CSV shows the better. In order to determine the weights of all cyber-threats, the AHP is used to design the hierarchical CSA index system that could divide all cyber-threats into the “Strong”, “Medium” and “Weak” 3 grey clustering classes. At the same time, the GCA is used to construct the criteria layer of index system. The key components of CSV could be clearly shown by those above ways. The CSV value is the summation of products, which products are multiplied by the occurrences number of each cyber-threat and its weight. Finally, the experimental results and system normal operation show that this method can dynamic display the macro security situation of EPIN in real time, with a high practical value.

关键词： Indexes Security Real-time systems Analytic hierarchy process Power systems Monitoring Internet

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Optimal cooperative pursuit on a Manhattan grid

Optimal cooperative pursuit on a Manhattan grid

引用

AIAA Guidance, Navigation, and control (GNC) Conference

作者： Kalyanam, Krishnamoorthy Darbha, Swaroop Khargonekar, Pramod Pachter, Meir Chandler, Phil InfoSciTex corporation Dayton OH 45431 United States Department of Mechanical Engineering Texas A and M University College Station TX 77843 United States Department of Electrical and Computer Engineering University of Florida Gainesville FL 32611 United States Department of Electrical Engineering Air Force Institute of Technology Wright-Patterson AFB OH 45433 United States Air Force Research Laboratory Control and Automation Branch Wright-Patterson AFB OH 45433 United States

ISBN: (数字)9781624102240

ISBN: (纸本)9781624102240

The optimal control of two pursuers searching for a slower moving evader on a Manhattan grid road network is considered. The pursuers do not have on-board capability to detect the evader and rely instead on Unattended Ground Sensors (UGSs) to locate the evader. We assume that all the intersections in the road network have been instrumented with UGSs. When an evader passes by an UGS location, it triggers the UGS and this time-stamped information is stored by the UGS. When a pursuer arrives at an UGS location, the UGS informs the pursuer if and when the evader passed by. When the evader and a pursuer arrive at an UGS location simultaneously, the UGS is triggered and this information is instantly relayed to the pursuer, thereby enabling "capture". We derive exact values for the minimum time guaranteed capture of the evader on the Manhattan grid and the corresponding pursuit policy.

关键词： Location

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Capacity improvement through buffer-aided successive opportunistic relaying

Capacity improvement through buffer-aided successive opportu...

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International Conference on Wireless Communication, Vehicular Technology, Information Theory and Aerospace and Electronic Systems Technology (Wireless VITAE)

作者： N. Nomikos D. Vouyioukas T. Charalambous I. Krikidis D. N. Skoutas M. Johansson Department of Information and Communication Systems Engineering University of the Aegean Greece Automatic Control Laboratory Electrical Engineering Department and ACCESS LinnaeusCenter Royal Institute of Technology Stockholm Sweden Department of Electrical and Computer Engineering University of Cyprus Nicosia Cyprus

In this work, we propose a buffer-aided successive opportunistic relaying scheme that aims to improve the average capacity of the network when inter-relay interference arises between relays that are selected for transmission and reception. In order to exploit the benefits of buffering at the relays, we propose a relay-pair selection policy that decouples the receiving relay at the previous time slot from being the transmitting relay at the next slot. Furthermore, we impose an interference cancellation threshold allowing the relay that is selected for reception, to decode and subtract the inter-relay interference. The proposed relaying scheme selects the relaying pair that maximizes the average capacity of the relay network. The performance of the proposed scheme is evaluated via simulation and comparisons with other state-of-the-art half and full-duplex relay selection schemes, in terms of outage probability, average capacity and average delay. The results reveal the need for a tradeoff between improving the outage on the cost of reduced capacity and increased delay, and vice versa. Finally, conclusions are drawn and future directions are discussed, including the need for a hybrid scheme incorporating both half and full-duplex characteristics.

关键词： Relays Artificial neural networks Signal to noise ratio

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Research on natural disaster risk assessment index system for power grid

Research on natural disaster risk assessment index system fo...

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3rd International Conference on Materials Science and Information Technology, MSIT 2013

作者： Yang, Guo Feng Zhao, Jia Kui Li, Ting Shun Jing, Zhou School of Economics and Management North China Electric Power University Beijing Ningxia Electric Power Company Yinchuan China Beijing China-Power Information Technology Co. Ltd State Grid Electric Power Research Institute Beijing China School of Control and Computer Engineering North China Electric Power University Beijing China

ISBN: (纸本)9783037857700

Recently the power grid at home and abroad are faced with the challenge of natural disasters, to guarantee the safe and stable operation of power grid is the key. In this paper, through the grid risk identification and vulnerability analysis, the degrees of power grid risk in different regions are presented. According to index selection principle, natural disaster risk assessment index system for power grid is put forward. The interpretation of the indexes are made. It provides a theoretical support for natural disaster risk assessment for power grid in the future. © (2013) Trans Tech Publications, Switzerland.

关键词： Risk assessment

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