Accurate parameters of the inverter-based resources (IBR) model are critical for the design of effective controlsystems. Both physics-based and data-driven methods present unique advantages and challenges in IBR para...
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ISBN:
(纸本)9798350331202
Accurate parameters of the inverter-based resources (IBR) model are critical for the design of effective controlsystems. Both physics-based and data-driven methods present unique advantages and challenges in IBR parameter predictions. This paper proposes a hybrid method that uses machine learning tools coupled with a physics-based model to generate predictions of the system outputs. The scientific machine learning (SciML)-based method reduces the data size requirements and training time of machine learning and the computational needs of traditional physics-based models. The proposed SciML method is accomplished in a novel way, wherein the loss equation of the machine learning techniques is modified to contain the known scientific equations for the system output. Simulation results on a buck converter demonstrate that the new method is able to produce more accurate predictions in less time than its non-assisted counterpart.
AC microgrids typically use droop-operated gridforming inverters for voltage and frequency regulation as this allows stabilisation of the microgrid without communication. However, in cases with very low X/R line ratio...
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ISBN:
(纸本)9798350372793;9798350372786
AC microgrids typically use droop-operated gridforming inverters for voltage and frequency regulation as this allows stabilisation of the microgrid without communication. However, in cases with very low X/R line ratios, there is greater coupling between real and reactive power and stability issues can occur. This paper proposes the use of an adaptive data-driven compensator which operates in conjunction with droop-control. The proposed data-drivencontrol uses an LQR formulation for improved performance, and is updated in real-time according to developed criteria in order to adapt to network changes. We demonstrate improved stability regions via a large-scale MATLAB/Simulink study of a two-inverter test system where the line and load parameters are varied randomly.
The rapid evolution of Intelligent Transportation systems (ITS) in the Big data era, propelled by the Internet of Things (IoT), has led to advanced data-driven vehicle traffic forecasting. Graph Neural Networks (GNNs)...
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ISBN:
(纸本)9781728190549
The rapid evolution of Intelligent Transportation systems (ITS) in the Big data era, propelled by the Internet of Things (IoT), has led to advanced data-driven vehicle traffic forecasting. Graph Neural Networks (GNNs), particularly the Attention-Based Spatial-Temporal Graph Neural Networks (ASTGNN), are promising in traffic forecasting but face limitations in integrating Big data with privacy-preserving Federated learning (FL) due to unique data topology processing. This paper introduces the Availability Aware Federated Attention-based Spatial-Temporal Graph Neural Network (FastFlow), an innovative framework that enhances ASTGNN by integrating Federated learning across entities and employing Big data methodologies. FastFlow's distinctiveness lies in its availability-aware approach, aggregating adjacency matrices for global topology and utilizing a novel communication protocol that prioritizes data availability and correlation among organizations. Our evaluation of Caltrans Performance Measurement System (PEMS) data in a simulated setup demonstrates FastFlow's ability to balance predictive accuracy and data security in a multi-organizational context.
This article designs a data-driven unsupervised defense scheme for nonlinear systems by proposing a machine learning approach called gate recurrent unit-based modified denoising and stable image representation-aided a...
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This article designs a data-driven unsupervised defense scheme for nonlinear systems by proposing a machine learning approach called gate recurrent unit-based modified denoising and stable image representation-aided autoencoders. The proposed scheme decomposes original data into two subspaces through orthogonal projection. For secure transmission, information related to the system's dynamics, which is in the image space of the controlled system, is hidden through filtering, whereas only the dynamic-independent information is plaintext for transmission, which supplements the cryptographic encryption methods from a control perspective. Moreover, attack detection for nonstealthy and stealthy attacks is achieved simultaneously under the same framework. A case study is conducted for validation on the a hardware-in-the-loop platform with a mecanum-wheeled vehicle. The comparative experiments with well-known unsupervised data-driven methods show the high detection accuracy of the proposed defense scheme for nonstealthy and stealthy attacks and the excellent encryption capability.
This article is concerned with a fault-tolerant control (FTC) scheme for feedback controlsystems with multiplicative faults by optimizing system performance with the aid of a reinforcement learning (RL) approach. To ...
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This article is concerned with a fault-tolerant control (FTC) scheme for feedback controlsystems with multiplicative faults by optimizing system performance with the aid of a reinforcement learning (RL) approach. To be specific, initially, based on the Youla-Kucera (YK) and dual YK parameterizations, a new performance-driven FTC method is proposed and its capability in dealing with multiplicative faults is proven. Then, data-driven implementation of this method using RL is elaborated. This implementation shows that RL can be applied efficiently by utilizing both plant model and data to recover the fault-induced system performance degradation. Finally, a benchmark study on an inverted pendulum system demonstrates the application of the proposed performance-driven FTC method.
Environments for autonomous driving can vary from place to place, leading to challenges in designing a learning model for a new scene. Transfer learning can leverage knowledge from a learned domain to a new domain wit...
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ISBN:
(纸本)9798350384581;9798350384574
Environments for autonomous driving can vary from place to place, leading to challenges in designing a learning model for a new scene. Transfer learning can leverage knowledge from a learned domain to a new domain with limited data. In this work, we focus on end-to-end autonomous driving as the target task, consisting of both perception and control. We first utilize information bottleneck analysis to build a causal graph that defines our framework and the loss function;then we propose a novel domain-agnostic learning method for autonomous steering based on our analysis of training data, network architecture, and training paradigm. Experiments show that our method outperforms other SOTA methods.
The growing interest in robust designs and data-driven technologies for safe control problems underscores the critical need to understand uncertainty for ensuring reliable safety guarantees. This review offers a conci...
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The growing interest in robust designs and data-driven technologies for safe control problems underscores the critical need to understand uncertainty for ensuring reliable safety guarantees. This review offers a concise survey of recent advancements in the control barrier function (CBF) method, widely recognized as a principled and effective approach to safe control, particularly in the context of uncertainty. From a unified perspective, we classify uncertainty into three types based on their learnability and transferability. Then we explore the techniques associated with each type of uncertainty found in the existing literature. Additionally, we highlight a knowledge-based safe control framework that utilizes meta-learning techniques to address dynamic uncertainty, shedding light on the potential for future investigations into practical learning algorithms and control problems. Furthermore, we employ topic modeling technologies to identify and generalize topics from the literature, thus revealing research trends and ongoing real-world applications withing the scope of safe control.
Derived from the Hindmarsh-Rose (HR) neuron model, the extended Hindmarsh-Rose (e-HR) neuron model with time delay is constructed considering the effect of intracellular ion transfer and the inherent slow current dela...
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In industrial positioning systems where rapid response and high-precision are crucial, minor model inaccuracies due to unknown dynamics and identification errors in controller design significantly impede achieving des...
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ISBN:
(纸本)9798350355376;9798350355369
In industrial positioning systems where rapid response and high-precision are crucial, minor model inaccuracies due to unknown dynamics and identification errors in controller design significantly impede achieving desired positioning accuracy. This paper introduces and evaluates a novel, direct data-drivencontrol-based additive feedforward (FF) compensation method, aimed at enhancing precision in positioning while streamlining the design process. The purpose of this additive FF compensation is to attenuate undesirable error responses resulting from modeling errors in the existing model-based FF design. The proposed method enhances control performance by utilizing data-driven prediction of positioning response and optimizing the predicted response. Moreover, this work presents a newly developed design theory for the additive FF controller and highlights its design efficiency. The effectiveness of the proposed approach is substantiated through comprehensive experiments with a galvano scanner in printed circuit board laser drilling applications, demonstrating significant improvements in positioning accuracy and response time.
Model Predictive control (MPC) method is widely used in autonomous vehicle control technology. The adjustment of MPC weights is crucial for optimizing its control performance, ensuring precise and reliable operation. ...
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Model Predictive control (MPC) method is widely used in autonomous vehicle control technology. The adjustment of MPC weights is crucial for optimizing its control performance, ensuring precise and reliable operation. Traditionally, these weights are adjusted manually, which is inefficient. This study introduces a novel Butterfly Optimization Algorithm (BOA) learning-based method to determine the optimal MPC weights in an efficient way. By adopting the data-driven idea in machine learning, the trajectory data of field experiment human drivers is used to train the controller weights. A simulation-based training platform that enables the automatic training of the MPC controller with varying weights is also developed. Simulation results demonstrate the superior control accuracy and stability performance of BOA learning-based method compared to Linear Quadratic Regulator (LQR) and pure pursuit strategies. The findings suggest that the control method proposed in this research can significantly improve autonomous vehicle control performance and their reliability, thereby contributing to the advancement of autonomous driving technology.
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