Liangkuan Zhu - IEEE Xplore Author Profile

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This paper investigates the observer-based sliding mode control (SMC) problem for interconnected systems under the constrained bit rate and weighted try-once-discard (WTOD) protocol. The bandwidth of the digital communication network is measured by the bit rate. With limited network bandwidth, a WTOD protocol is introduced to reduce the length of the transmitted sensor data to reduce the bit rate ...Show More
In this paper, we design a distributed functional interval observer for discrete time-varying nonlinear interconnected systems. The communication between subsystems adapts the coding-decoding scheme (CDS) to save bandwidth and avoid data conflicts. The state set is described by the ellipsoid which can improve estimation accuracy and reduce conservatism. Besides, we give the conditions for the esta...Show More
As an emerging energy carrier, hydrogen presents a potential opportunity to increase the flexibility and resiliency of the integrated power and transportation system having ultrahigh penetration of renewable generation. This article studies a conceptual integrated energy-mobility system (IEMS) based on renewable-to-hydrogen stations (RHSs) and tank truck fleets. In an RHS, the renewables power the...Show More
In order to guarantee slab thickness precision of medium density fiberboard (MDF), the continuous hot-pressing process based on intelligent dynamic surface control (DSC) was investigated. Firstly, a mathematic model for hydraulic servo system of the continuous hot-pressing machine was proposed. Due to the uncertain function in the model, a fuzzy logic system was introduced to approximate it. Subse...Show More
This paper presents a novel nonlinear control approach for medium-density fiberboard continuous hot pressing electro-hydraulic servo system (EHSS). The EHSS is subject to input saturation and unknown external disturbance. The approach is developed in the framework of the prescribed performance control design. The transient and steady behaviors are both considered by virtue of an appropriate perfor...Show More
This paper presents a novel nonlinear control approach for a medium density fiberboard continuous hot pressing hydraulic system. Uncertainties, disturbances, and input saturation are explicitly taken into account. The proposed controller incorporates a smooth function by using a hyperbolic tangent function to substitute for the saturation nonlinearity in the system. Moreover, a novel backstepping-...Show More
In order to realize position tracking for Medium Density Fiberboard (MDF) continuous hot pressing electro-hydraulic servo system at the fixing thickness stage, a sliding-mode dynamic surface control strategy is proposed. Compared with backstepping method, dynamic surface control (DSC) introduces the first low-pass filters into the procedure to calculate derivatives of synthetic inputs, which simpl...Show More
This paper presents an adaptive backstepping terminal sliding mode control scheme combined the sliding mode disturbance observer for hot press hydraulic position servo system with composite disturbance including internal parameter perturbations and external load disturbance. The sliding mode disturbance observer (SMDO) based on adaptive-gain super-twisting (STW) algorithm is introduced to ensure t...Show More
A smoothing neural network (SNN) can be proposed for solving a kind of constrained convex problems, which has wide applications in image restoration. The optimization model is a nonsmooth convex problem with convex constraint defined by a class of affine equalities. Thanks to the smoothing methods, the SNN can be modeled by a differential equation instead of a differential inclusion and it can be ...Show More
The pictures extracted from the plant roots often have quite big noises and often affected greatly by the light intensity, neither could we achieve satisfactory results by using the traditional image edge detection method to detect the edge information. To this issue, a method for edge detection and its application in edge image detection for plant roots via gabor wavelet theory is proposed, which...Show More
Even the multiple support vector machine (SVM) ensemble has been proved to improve the classification performance greatly than a single SVM, the classification result of the practically implemented SVM is often far from the theoretically expected level. As compared to traditional bagging and boosting methods, this paper proposes a novel SVM ensemble method based on fuzzy integral and rough reducts...Show More
Recently, in the area of pattern recognition, the concept of combining multiple support vector machines (SVMs) has been proposed as a new direction to improve classification performance. However, current commonly used SVMs aggregation strategies do not evaluate the importance of degree of the output of individual component SVM classifier to the final decision. A method for multiple SVMs combinatio...Show More
Even the support vector machine (SVM) has been proved to improve the classification performance greatly than a single SVM, the classification result of the practically implemented SVM is often far from the theoretically expected level because they don't evaluate the importance degree of the output of individual component SVMs classifier to the final decision. This paper proposes a boosting least s...Show More