Chunyan Du

Qingdao University

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Ai‐Guo Wu

Harbin Institute of Technology

Guansheng Xing

Qingdao University of Science and Technology

Chao Jia

Tianjin University of Technology

Dapeng Zhang

Tianjin University

Aihong Zheng

Tianjin University

Guansheng Xing

Nanjing University of Posts and Telecommunications

Xu Xu

University of Sheffield

Wenpeng Zhai

Tianjin University

Changbin Li

Tianjin University

Mahdi Mahfouf

University of Sheffield

Cooperative Institutions

Tianjin University

Qingdao University

Hebei University of Technology

University of Sheffield

Affiliated Hospital of Qingdao University

Harbin Institute of Technology

Qingdao University of Science and Technology

Insigneo

Tongji University

Huazhong Agricultural University

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Variable structure control with sliding mode for a class of hydraulic nonlinear system

Chao Jia Ai‐Guo Wu Chunyan Du Dapeng Zhang

A nonlinear system model for a class of hydraulic device was constructed.On the basis of the conversion of its model,an exponent approaching law with variable parameter was adopted to realize the sliding mode control. A position tracking with high precision was realized,and it had a better disturbance-resistant ability . A boundary layer technique was used to reduce the chattering in sliding mode control .The simulation result proves that the designed controller can achieve the scheduled demand and has a good effect.

Mode (computer interface)

Position (finance)

Position tracking

10.1109/wcica.2010.5553749

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Citations (1)

Distributed aggregation control of mobile robotic network

Guansheng Xing Sun Hao Haiyong Chen Chunyan Du

This paper addresses distributed control of mobile robotic network with fixed communication topology and limited sensing ability for its aggregation behavior. The communication and mutual sensing among mobile nodes are modeled by two undirected graphs, respectively. We propose a design of distributed control laws by using two kinds of pairwise potential functions defined over undirected graphs: an extended Morse potential to make robots aggregate and keep them in formation with a crystal-like shape and a repulsive potential responsible for avoiding collisions between neighbors. The gradient of total potential is used to derive a switching control law running locally on each nonholonomic robot with limited velocity considered. Finally, nontrival simulated experiments verify the effectiveness and efficiency of the methodology and show that the scaling of the resulted crystal shape can be manipulated by changing only one parameter.

10.1109/wcica.2010.5554846

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Citations (0)

Modeling and control simulation for force couple leveling system of hydraulic press

Chunyan Du Guansheng Xing Chao Jia

This paper studies force couple leveling system of heavy hydraulic press. A multi-input and multi-output nonlinear model is established on the basis of analyzing hydraulic structure and block kinematics. A cascade control structure is designed for the leveling system. In the outer loop, each corner follows the average displacement other two corners adjacent to it using PI method, and the desired pressure of inner loop is given. In the inner loop the cylinder pressure is controlled using parameter variable PD method. Modeling and control simulation in Matlab show that the designed control method has a good synchronization effect.

Inner loop

Hydraulic press

Pressure Control

10.1109/wcica.2012.6358421

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Citations (1)

Control of nonlinear functional differential equations

Nonlinear Analysis (2009)

Chunyan Du Xu Xu S.P. Banks Ai‐Guo Wu

Sequence (biology)

10.1016/j.na.2009.02.094

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Citations (4)

Multiple cross-correlation noise induced transition in a stochastic bistable system

Physica A Statistical Mechanics and its Applications (2016)

Canjun Wang Keli Yang Chunyan Du

Bistability

Multiplicative noise

Stochastic Resonance

First-hitting-time model

10.1016/j.physa.2016.11.145

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Citations (26)

Iterative approximation control of hydraulic press

Chinese Control Conference (2011)

Chunyan Du Guansheng Xing Ai‐Guo Wu

In this paper, a sliding mode controller is designed for a hydraulic press based on iterative approximation method. The nonlinear model of the hydraulic press is approached by a sequence of iterative linear time-varying systems, thus the control problem of the nonlinear system could be solved through these linear systems. Then a series of sliding controllers are designed for the sequence of linear time-varying approximations, these controllers will converge to a effective sliding mode controller of the original nonlinear system. Simulation results show that precise speed tracking could be achieved through this method. And when the bulk modulus and the reaction force change, the controller is robust.

Sequence (biology)

Mode (computer interface)

Source

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Citations (0)

Control of Nonlinear Distributed Parameter Systems Based on Global Approximation

Journal of Applied Mathematics (2014)

Chunyan Du Guansheng Xing

We extend an iterative approximation method to nonlinear, distributed parameter systems given by partial differential and functional equations. The nonlinear system is approached by a sequence of linear time-varying systems, which globally converges in the limit to the original nonlinear systems considered. This allows many linear control techniques to be applied to nonlinear systems. Here we design a sliding mode controller for a nonlinear wave equation to demonstrate the effectiveness of this method.

Sequence (biology)

Distributed parameter system

10.1155/2014/845370

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Citations (1)

Sliding control of nonlinear distributed parameter systems based on iterative approximation

Chunyan Du Guansheng Xing Ai‐Guo Wu Dapeng Zhang

The paper studies the sliding mode control of nonlinear, distributed parameter system described by partial differential equations. The nonlinear system is approximated by a sequence of linear, time-varying system which, under very mild conditions, globally converges in the limit to the nonlinear systems considered. This reduces the nonlinear control problem to linear, time-varying control problems. For each iterative approximation, an infinite-dimensional time-varying sliding surface and the corresponding control input is designed. The converged control input could exponentially stabilizes the nonlinear system. Here we give an example of nonlinear wave equation to illustrate the theory.

Distributed parameter system

10.1109/wcica.2010.5553858

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Citations (0)

Optimal control of force couple leveling system in heavy hydraulic forging presses

Chunyan Du Guansheng Xing Jie Wang

Force couple leveling system is a leveling structure used in heavy hydraulic presses to keep the slider moving horizontally. This paper develops a hierarchical synchronous motion control method for this system. We transfer the model of the leveling system into motion control subsystem and pressure control subsystems and design a hierarchical control structure based on them. In the outer loop, we use an optimal control method with disturbance estimation to minimize synchronization error and get desired pressure difference. In the middle loop we use a pressure allocation method to transfer the desired pressure difference to desired cylinder pressure. In the inner loop each cylinder is controlled by PD method to follow the given pressure. Simulation experiments show that the hierarchical optimal control method has a good synchronization effect.

Pressure Control

Inner loop

Hydraulic press

10.23919/chicc.2017.8028141

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Citations (1)

A new consensus protocol for high order multi-agent systems

2022 34th Chinese Control and Decision Conference (CCDC) (2014)

Changbin Li Chunyan Du Yi He

In this paper, the consensus problem of a class of high order multi-agent systems is studied. We supposed the multi-agent can only exchange information only accord to a directed communication graph. By using the relative state consensus algorithm, a sufficient condition is provided for consensus achievement. Then, a new consensus protocol which using a state observer is provided. The N observer and the N multi-agents can be viewed as 2N multi-agent components which will reach consensus asymptotically. This technique simplified consensus protocol design to some extent. We believe this technique can be extended to solve consensus problem exists in multi-agent systems with nonlinear dynamics over directed communication graph or even switching graph.

Uniform consensus

10.1109/ccdc.2014.6852340

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Citations (1)