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第三十三届中国控制会议

作者： Wen Xie Yuanqing Xia School of Automation Key Laboratory of Intelligent Control and Decision of Complex SystemsBeijing Institute of Technology

In this paper, the problem of parameter estimation is investigated for a class of discrete-time linear systems with missing outputs and outliers. It is assumed that the unknown parameters are constant and the evolution of the systems is subject to some unknown but bounded noises. To solve such a problem, a recursive algorithm based on set membership identification is proposed and employed. Besides, the data validation is processed and outliers are set aside. The effectiveness of the algorithm is verified by performing some numerical simulations.

关键词： Parameter estimation,missing output,outlier,bounded noise,set membership identification.

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Data Fusion with Packet Loss

Data Fusion with Packet Loss

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第三十三届中国控制会议

作者： Xiaolei Bian Yuanqing Xia Liping Yan Mengyin Fu School of Automation Key Laboratory of Intelligent Control and Decision of Complex Systems Beijing Institute of Technology

ISBN: (纸本)9781479947249

This paper studies the stability of state estimation for a discrete-time linear stochastic system, the states of which are measured by multiple sensors and transmitted over multiple wireless channels. Random packet loss process introduced by each wireless channel is modeled by an independent and identically distributed(i.i.d.) Bernoulli process. The estimation strategy designed in this paper is based on Covariance Intersection fusion of local state estimates of the observable subsystem of each sensor. The sufficient conditions, imposing constraint on the packet success probability of each channel, are established by taking into account each observable subsystem structure to guarantee the expectation of the trace of estimation error covariance matrices is exponentially bounded, and the upper bound is given. Simulation examples are provided to demonstrate the effectiveness of the results.

关键词： Data Fusion,Covariance Intersection,Kalman Filtering,Packet loss

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IEEE 802.15.4e LLDN:Superframe Configuration For Networked control systems

IEEE 802.15.4e LLDN:Superframe Configuration For Networked C...

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第三十三届中国控制会议

作者： Mashood Anwar Xia Yuanqing School of Automation Key Laboratory of Intelligent Control and Decision of Complex SystemsBeijing Institute of Technology

Wireless networked control systems have gained significant popularity due to commissioning and maintenance *** there are various wireless communication protocols available to accomplish the control networks. Recently, IEEE802.15.4e protocol for low latency deterministic network has been introduced that shows prominent theoretical characteristics under effective frequency planning to minimize mutual interference. Factory automation, highly exacting from low latency point of view, requires sensors refresh rate not more than of order 10 milliseconds. This new protocol meets such stringent requirement of industrial automation systems. In this paper, we compare the new protocol with its previous version and observe its suitability for industrial networked control systems as a communication protocol. We introduce different LLDN(low latency deterministic network) superframe configurations that show trade-offs among various network parameters. It gives an insight of relationship among various network parameters like sensors refresh rate, number of devices accommodated in network and data payload exchanged between coordinator and end devices with emphasis on different levels of security incorporated.

关键词： Wireless,Networked control systems,IEEE 802.15.4e,LLDN,Industrial wireless networked control systems

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Modeling of hysteresis in piezoelectric actuator based on adaptive IIR filter

Modeling of hysteresis in piezoelectric actuator based on ad...

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IEEE International Conference on Mechatronics and Automation

作者： Ning Dong Fengmin Shan Xiangdong Liu Key Laboratory for Intelligent Control & Decision of Complex Systems Beijing Institute of Technology Beijing China

This paper presents a novel adaptive IIR filter modeling for the hysteresis characteristic in PEA (piezoelectric actuator). First, the PEA hysteresis operators are introduced and the modeling methods of traditional adaptive IIR (infinite-impulse response) filter are discussed. Then, delay operators of IIR adaptive filter are replaced with Backlash operators to compose a new adaptive IIR filter model. During the modeling process, LMS (Least Mean Square) algorithm is used to adjust the weight values. At last the modeling effectiveness is verified via a micro-positioning system experiment platform based on PEA. Experimental results show that the proposed Backlash operator based IIR adaptive filter can achieve accurate hysteresis modeling.

关键词： Adaptation models IIR filters Finite impulse response filters Adaptive filters Mathematical model Hysteresis Delays

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Distributed Tracking for Multiple Lagrangian systems Using Only Position Measurements.

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IFAC Proceedings Volumes 2014年第3期47卷 287-292页

作者： Qingkai Yang Fengyi Zhou Jie Chen Xin Li Hao Fang School of Automation Beijing Institute of Technology Beijing 100081 Key Laboratory of Intelligent Control and Decision of Complex Systems Beijing 100081 China

This paper investigates the distributed tracking control problem for multiple Lagrangian systems under a general directed graph where only a portion of the agents have access to the desired time-varying trajectory. To overcome the problem that only positions are measured, a observer is designed to estimate the velocity for each follower. By employing the estimated states, the distributed observer-based controller is proposed using only position measurements. Furthermore, the condition for the distributed tracking problem on the directed graph is derived, such that the tracking errors and observer errors semi-globally converge to zero. Finally, simulation examples are provided to show the effectiveness of the proposed control algorithms.

关键词： Multi-agent systems Distributed control Coordinated tracking Lagrangian system Velocity observer

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Distributed adaptive tracking on Lagrangian systems with reduced interaction

Distributed adaptive tracking on Lagrangian systems with red...

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World Congress on intelligent control and Automation (WCICA)

作者： Yuchen Liu Hao Fang Yutian Mao Key Laboratory of Intelligent Control and Decision of Complex Systems Beijing Institute of Technology Beijing China

In this paper, we propose a distributed adaptive approach for tracking problem without using leader's velocity information, where agents are modeled by Euler-Lagrange equations. It is assumed that only a small fraction of agents within the leader's communication range are informed about the position of the leader. Without using the leader's velocity information, a connectivity-preserving adaptive controller is proposed to achieve tracking control on Lagrangian systems with the leader of constant velocity. Moreover, position and velocity consensus can be achieved asymptotically with the proposed control strategy. Numerical simulations are further provided to illustrate the theoretical results.

关键词： intelligent control Automation

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Stability control for biped walking based on phase modification during double support period

Stability control for biped walking based on phase modificat...

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IEEE International Conference on Robotics and Biomimetics

作者： Tongtong Li Zhangguo Yu Juan Chen Yan Liu Maoxing Zheng Libo Meng Gan Ma Wen Zhang Weimin Zhang Qiang Huang Ministry of Education The Key Laboratory of Intelligent Control and Decision of Complex System Beijing China North Navigation Control Technology Co. Ltd. China

ISBN: (纸本)9781479973989

This paper presents a control strategy based on phase modification during double support period to enhance a humanoid robot's walking stability. When the foot of the swing leg touches the ground, if Zero Moment Point(ZMP) is not in the stable margin, the phase modification will start. According to the position of ZMP and the relationship between the motion of Center of Gravity(COG) and ZMP position, the related parameters are solved. Series of experiments are taken, and the effectiveness of the method is validated repeatedly.

关键词： Legged locomotion Foot Stability analysis Planning Humanoid robots Robot kinematics

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Optimal Hierarchical Allocation in Deregulated Electricity Market under PSP Auction Mechanism

Optimal Hierarchical Allocation in Deregulated Electricity M...

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第26届中国控制与决策会议

作者： Zhongjing Ma Yingying Cui School of Automation Beijing Institute of Technology (BIT)and the National Key Laboratory of Complex System Intelligent Control and Decision (BIT) School of Automation BIT

ISBN: (纸本)9781479937097

In hierarchical electricity market, the retailers buy electricity from generation provider and then sell it to users. Retailers play an important role in the distribution channel by matching supply and demand, but they also potentially cause inefficiencies in electricity allocation. To induce an efficient allocation of electricity, we propose a novel hierarchical distributed method under PSP auction mechanism. Under this mechanism, each of players, either the generation provider or the retailers, obtains their electricity allocation through the PSP auction method by submitting a multi-dimensional bid profile, instead of telling their private cost or valuation function, then the retailers economically distribute the electricity, acquired in the PSP auction, among users. Moreover, the valuation function of retailers depends on the revenues that they sell the electricity to users. As a main result, in this paper we show that there exists an efficient Nash equilibrium (NE) for the underlying auction games.

关键词： Deregulated electricity market Hierarchical allocation PSP auction mechanism Efficient allocation Nash equilibrium Nash equilibrium Electricity power markets REG1A gene Postsynaptic Potentials BPIFA2 gene RIDA gene cost accounting Hierarchical Consumers

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Active disturbance rejection control of servo platform using improved nonlinear control law

Active disturbance rejection control of servo platform using...

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International Conference on intelligent control and Information Processing (ICICIP)

作者： Hang Zhang State Key Laboratory of Intelligent Control and Decision of Complex Systems Beijing Institute of Technology Beijing China

ISBN: (纸本)9781479936519

A new kind of nonlinear control law is proposed for the purpose of improving servo platform tracking performance under condition of rapid movement. On the basis of linear ADRC, an arctangent function is selected, and smoothly extended to an anti-S curve. The new method retains the feature of estimating and compensating the internal un-modeled dynamics and external disturbances. Simulation and comparison tests show that system using new control method has faster and more accurate tracking results.

关键词： PD control Servomotors Tuning Mathematical model Observers Hardware

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Slip prevention of a humanoid robot by coordinating acceleration vector

Slip prevention of a humanoid robot by coordinating accelera...

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International Conference on Information and Automation (ICIA)

作者： Zhangguo Yu Jing Li Qiang Huang Xuechao Chen Gan Ma Libo Meng Si Zhang Yan Liu Wen Zhang Weimin Zhang Xiaopeng Chen Junyao Gao Key Laboratory of Biomimetic Robots and Systems Ministry of Education Beijing China Intelligent Robotics Institute Beijing Institute of Technology Beijing China Key Laboratory of Intelligent Control and Decision of Complex System Beijing China

A humanoid robot may suffer from slip since its two feet are not fixed on the ground. Slip occurrence may induce the loss of robot's balance. The previous literature focused on the detection or estimation of the slip occurrence, or only employed the translational acceleration regulation to overcome slip. This study proposes a slip prevention method by coordinating acceleration vector including the horizontal, vertical, and rotational acceleration components. The contribution of this paper is to regulate the translational and rotational acceleration together to prevent the slip occurrence. The effectiveness of our proposed method was verified by simulations and experiments on an actual humanoid robot.

关键词： Acceleration Robot kinematics Vectors Humanoid robots Mathematical model Equations

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