The most promising solution for future energy grids is demand response. A novel incentive based demand response scheme in electricity markets is proposed for trading energy among one service provider and multiple cust...
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To tackle the over-actuated and highly nonlinear characteristics that four-wheel-independent-steering and four-wheel-independent -driving (4WIS/4WID) vehicles exhibit when tracking aggressive trajectory, a hierarchica...
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To tackle the over-actuated and highly nonlinear characteristics that four-wheel-independent-steering and four-wheel-independent -driving (4WIS/4WID) vehicles exhibit when tracking aggressive trajectory, a hierarchical controller with layers of computation-intensive modules is commonly adopted. The high-level linear motion controller commands the desired state derivatives of the vehicle to meet the overall trajectory tracking objectives. Then the system dynamic is inversed by the mid-level control allocation layer and the low-level wheel control layer to map the target state derivatives to steering angle and motor torque commands. However, this type of controller is difficult to implement on the embedded hardware onboard since the nonlinear dynamic inversion is typically solved by nonlinear programming. This article refines the dynamic inversion part of current hierarchical trajectory tracking controller for 4WIS/4WID vehicles with consideration of the nonlinear tyre/vehicle dynamics and of computational complexity. First, the mid-level control allocation layer distributes target resultant forces to each tyre via the less computationally troublesome direct allocation method. The current method to determine the attainable generalised force subset (AFS) in direct allocation cannot incorporate the tyre friction circle constraints, leading to an inaccurate AFS. The inaccuracy of AFS will either introduce inversion error or fail to return controls for theoretically-attainable generalised force. Hence, a means of determining the refined AFS, which considers the actual tyre force limits and uses polygons to approximate tyre friction circles, is designed. Second, the low-level wheel control layer steers and drives the wheel to achieve the target tyre forces. An iterative method with proofed convergence is proposed to inverse the nonlinear tyre model. The effectiveness of the refinements is validated by Carsim and MATLAB/Simulink co-simulation. Simulation results demonstrate
A classical process for quality assessment in man-ufacturing is to perform shape reconstruction of manufactured workpieces for generation of a digital counterpart of the already constructed physical good and further e...
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Gradient compression algorithms are widely used to alleviate the communication bottleneck in distributed ML. However, existing gradient compression algorithms suffer from accuracy degradation in Non-IID scenarios, bec...
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The modeling the traffic dynamics in urban areas is mainly based on the so-called 'store-and-forward' model. This model was used to model the number of vehicles on the streets of a network of four intersection...
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This study proposes a multiobjective fuzzy nonlinear programming (MOFNP) approach to enhance the long-term yield competitiveness of a semiconductor manufacturing factory. By modeling the long-term competitiveness of e...
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This study proposes a multiobjective fuzzy nonlinear programming (MOFNP) approach to enhance the long-term yield competitiveness of a semiconductor manufacturing factory. By modeling the long-term competitiveness of every product in a semiconductor manufacturing plant with the fuzzy correlation coefficient (FCC) between time and instantaneous competitiveness, the proposed model considers the various viewpoints when interpreting the overall competitiveness of the semiconductor manufacturing plant in the long-term. All noninferior solutions of the MOFNP solutions are then derived using a systematic procedure. A real example is employed to illustrate the applicability of the proposed methodology.
Recover FLFBA algorithm for Economic Load Dispatch This article presents the performance and reliability of the recover FLFBA algorithm for Economic load dispatch (ELD), which is a complex issue in electrical power sy...
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This work introduces a novel optimization procedure for converting a MIMO antenna operating in multibands into an Ultra-Wide Band (UWB) operating antenna. The Sequential Non-Linear programming algorithm (SNLP) of HFSS...
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The study considers the method of virtual localization of near-net-shaped workpices, which are to be processed on CNC machines. It is shown that virtual localization based on a combination of CMM inspection of the sha...
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In order to solve the problem that it is difficult to effectively express and quantify various uncertain factors in infrastructure network attacker-defender game modelling, an infrastructure network attacker-defender ...
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