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Changzhu Zhang
Tongji University
14Publications
5H-index
52Citations
Publications 15
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#1Changzhu Zhang (Tongji University)H-Index: 5
#2Hak-Keung Lam ('KCL': King's College London)H-Index: 46
Last.Qijun Chen (Tongji University)H-Index: 7
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This paper examines the problem of membership-function-dependent controller design for a class of discrete-time T-S fuzzy systems. Based on the partition method of premise variable space, the original T-S fuzzy model is equivalently converted into a piecewise-fuzzy system. Then, by employing some staircase functions, the continuous membership functions are approximated by a series of discrete values via which the information of membership functions is brought into the stability analysis to reduc...
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#2Changzhu Zhang (Tongji University)H-Index: 5
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This paper concerns with the problem of event-triggered dissipative control for discrete-time fuzzy singular systems. By adopting the fuzzy modeling and the idea of input delay method, the nonlinear singular system with event-triggered control scheme is reformulated as a new piecewise fuzzy singular system with time delays. Based on the PQLF and some techniques on matrix convexification, an approach to the event-trigger dissipative piecewise state-feedback controller design is developed for the ...
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#1Meng Han (Yanshan University)
#2Hak-Keung Lam ('KCL': King's College London)H-Index: 46
Last.Changzhu Zhang (Tongji University)H-Index: 5
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Abstract This paper presents a methodology to investigate the observer-based control for positive nonlinear systems with unknown time delay through analyzing the stability and positivity of positive polynomial fuzzy-model-based (PPFMB) observer-control systems with unknown time delay and unmeasurable premise variables. In order to widen the application of research results and relax the research results, the polynomial fuzzy observer-controller employs a membership function depending on estimated...
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#1Weilin Yang (Jiangnan University)H-Index: 6
#2Dezhi Xu (Jiangnan University)H-Index: 7
Last.Wenxu Yan (Jiangnan University)H-Index: 4
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Abstract Robust model predictive control (RMPC) has gained much attention in the past two decades. For classic finite-horizon RMPC, a terminal constraint set together with a terminal cost function are usually employed for the purpose of closed-loop stability. However, computational burden and feasibility region may need to be carefully addressed when the prediction horizon length becomes large, especially for the cases with additive disturbances. In this paper, a novel RMPC approach with pseudo ...
2 CitationsSource
#1Changzhu Zhang (Tongji University)H-Index: 5
#2Jinfei Hu (ZJOU: Zhejiang Ocean University)H-Index: 3
Last.Qijun Chen (Tongji University)H-Index: 7
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In this paper, the problem of steering control is investigated for vehicle path tracking in the presence of parametric uncertainties and nonlinearities. In practice, the vehicle mass varies due to the number of passengers or amount of payload, while the vehicle velocity also changes during normal cruising, which significantly influences vehicle dynamics. Moreover, the vehicle dynamics are strongly nonlinear caused by the tire/road forces under different road surface conditions. With fuzzy modeli...
7 CitationsSource
#1Changzhu Zhang (Tongji University)H-Index: 5
#2Mengjiao Shen (Tongji University)
Last.Jinfei Hu (ZJOU: Zhejiang Ocean University)
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In this paper, the problem of event-triggered H∞ piecewise controller design is concerned for discrete-time networked nonlinear systems represented by T–S fuzzy models. Based on the event triggering communication strategy, only the state information of the plant that violates a predefined triggering condition is transmitted in the shared communication channels. Considering that the premise variables of the plant in the form of T–S fuzzy representation are not synchronously available at the contr...
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#1Changzhu ZhangH-Index: 5
#2Hak-Keung LamH-Index: 46
Last.Qijun ChenH-Index: 7
view all 5 authors...
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#1Guangyong An (Tongji University)
#2Changzhu Zhang (Tongji University)H-Index: 5
Last.Hong Sun (Tongji University)H-Index: 1
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Considering the variations of vehicle mass and velocity, a Takagi-Sugeno fuzzy model is proposed to describe the lateral vehicle dynamics. Under Lyapunov stability framework, sufficient conditions in terms of linear matrix inequalities have been derived for the stability of the path tracking system and the existence of admissible state feedback controllers, is also given for the closed-loop system to be asymptotically stable with a prescribed \mathcal{H}_{\infty}disturbance attenuation level....
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#1Chengju Liu (Tongji University)H-Index: 6
#2Li Xia (Tongji University)H-Index: 1
Last.Qijun Chen (Tongji University)H-Index: 8
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This work concerns biped adaptive walking control on slope terrains with online trajectory generation. In terms of the lack of satisfactory performances of the traditional simplified single-layered Central Pattern Generator (CPG) model in engineering applications where robots face unknown environments and access feedback, this paper presents a Multi-Layered CPG (ML-CPG) model based on a half-center CPG model. The proposed ML-CPG model is used as the underlying low-level controller for a quadrupe...
5 CitationsSource
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