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3rd Modeling, Estimation and control conference (MECC)

作者： Abtahi, Mohammad Rabbani, Mahdis Nazari, Shima Univ Calif Davis Davis CA 95616 USA

ISBN: (纸本)9781713872344

Model predictive control (MPC) is a powerful tool for planning and controlling dynamical systems due to its capacity for handling constraints and taking advantage of preview information. Nevertheless, MPC performance is highly dependent on the choice of cost function tuning parameters. In this work, we demonstrate an approach for online automatic tuning of an MPC controller with an example application to an ecological cruise control system that saves fuel by using a preview of road grade. We solve the global fuel consumption minimization problem offline using dynamic programming and find the corresponding MPC cost function by solving the inverse optimization problem. A neural network fitted to these offline results is used to generate the desired MPC cost function weight during online operation. The effectiveness of the proposed approach is verified in simulation for different road geometries. Copyright (c) 2023 The Authors. This is an open access article under the CC BY-NC-ND license (https://***/licenses/by-nc-nd/4.0/)

关键词： Model Predictive control (MPC) Neural Network Ecological Cruise control Automatic Tuning Online Tuning

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Numerical studies of the inner wind field in a large-scale centrifuge chamber 3

Numerical studies of the inner wind field in a large-scale c...

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3rd international conference on Mechanical Design and Simulation, MDS 2023

作者： Jie, Fang Hao, Huang Dengrui, Wang Beijing Institute of Control and Electronic Technology Beijing100045 China Beijing Aerospace Propulsion Institute Beijing100076 China

ISBN: (纸本)9781510664890

Based on the structure of a certain large-scale centrifuge and its chamber, a hydrodynamic lattice model is established to study the wind field inside the centrifuge chamber. The flow field in the centrifuge chamber was numerically analyzed through LBM method, and the wind speed and pressure distribution parameters during the transient acceleration phase and the steady-state phase were obtained. The relationship between the wind speed and pressure and the rotational speed of the centrifuge was studied by changing the rotational speed and the corresponding effective g value. © 2023 SPIE.

关键词： Centrifuges

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Experimental Study of Active and Reactive Power control in a Grid-Connected Photovoltaic System Using an Optimally tuned Sliding Mode controller 3

Experimental Study of Active and Reactive Power Control in a...

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3rd IEEE international conference on Sustainable Energy and Future Electric Transportation, SeFet 2023

作者： Mohapatra, Bhabasis Tofu, Mathew Kobla Pati, Swagat Sahu, Binod Kumar Department of Electrical Engineering Iter Bhubaneswar India

ISBN: (纸本)9798350319972

At the distribution level, active and reactive power control is needed for a local load integrated to a grid-connected photovoltaic (GCPV) system. This article proposes a GCPV system for managing active and reactive power through Improved Arithmetic Optimization Algorithm (IAOA) based Sliding Mode controller (SMC) and Proportional-Integral (PI) technique. The conventional PI controller that is utilized in GCPV system has a significant undershoot and a long settling period that needs modification for each change in the reference pattern. SMC is therefore used to guarantee robustness against external disruptions. It is improved by implementing the IAOA based SMC technique, which results in increased performance for active and reactive power control in terms of settling time and undershoot. In comparison to IAOA-SMC, for management of active and reactive power has a settling time of 1.02 sec with undershoot of 1.86% and settling time of 0.05 sec with undershoot of 2.5 % respectively whereas IAOA-PI for active and reactive power control has a settling time of 2.51 sec with undershoot of 3.63% and settling time of 1.95 sec with undershoot of 98.83 % respectively. As a result, it can be said that the IAOA-based SMC controller performs more dynamically than PI. The MATLAB environment serves as the platform to evaluate the operation of a GCPV system and OPAL-RT 4510 real-time simulator has been utilized for experimental validation. © 2023 IEEE.

关键词： controllers

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Development method of American heavy vehicle low-load test cycle

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ENERGY REPORTS 2023年 9卷 144-152页

作者： Hu, Xi Liu, Yu Li, Jingyuan China Automot Technol & Res Ctr Co Ltd Tianjin Peoples R China CATARC Automot Test Ctr Tianjin Co Ltd Tianjin Peoples R China

Heavy vehicles have higher driving time and NOx emission level under low-load scenarios. Developing and inducting corresponding test cycle into emission valuation and certification standards is an effective method to improve translation from test emission results to real-world emission control benefits. At present, China is short of systematic research and achievements in this field. Present certification cycle failed to evaluate low-load emission. In America, CARB firstly applied least-square method to fit the multi-modal normal distribution with moving window average load, thus defined low-load data set. Secondly, applied K-means clustering method to classify and identity typical low-load driving scenarios. Thirdly, applied model to translate vehicle profile to construct low-load profile library. Finally, selected and combined representative profiles to construct the Low-load test cycle (LLC). Further more, by engine dynamo meter test and model simulation, LLC was used to evaluate the after treatment system and improve emission control technology under low-load scenarios. This paper comprehensively studied the overall process of cycle construction, verification and application, explained in detail the technical details of cycle construction routine, thus, provided practical technical support for development of China's low-load test cycle. (C) 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： Emission control technology Low-load moving window Test cycle construction After-treatment system evaluation

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Research and application of 3D simulation of truck formation based on Unreal Engine 3

Research and application of 3D simulation of truck formation...

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3rd international conference on Image Processing and Intelligent control, IPIC 2023

作者： Wang, Zhenzhou Wu, Fang Zhang, Jiangnan Wu, Jianguang School of Computer and Artificial Intelligence Zhengzhou University China The School of Geo-Science & Technology Zhengzhou University China

ISBN: (纸本)9781510668140

In order to show the transport conditions of goods on different roads and provide more real and three-dimensional transport information for situation inference users, this paper proposes a simple and PID controlled three-dimensional simulation method for truck formation based on Unreal Engine. Firstly, based on the basic theory of automatic control[1], the longitudinal lollipop controller and the transverse PID controller are designed respectively based on the lollipop control and PID control ideas, and the perception-decision framework is combined to realize the automatic driving of the truck along the spline line on the road. On this basis, a truck controller is designed to realize the truck formation driving with high recovery degree based on the leader-follower strategy. The results show that the truck based on PID control can accurately drive along the road line. With the cooperation of truck formation controller, the whole process of formation, maintenance and driving of truck formation can be basically restored. © 2023 SPIE.

关键词： controllers

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Research on Digital Induction Heating Power Supply control System 3

Research on Digital Induction Heating Power Supply Control S...

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3rd international Symposium on Electrical, Electronics and Information engineering, ISEEIE 2023

作者： Xiao, Qijun Li, Zefeng Liang, Hai School of Electronic and Electrical Engineering Zhaoqing University Duanzhou Zhaoqing China Guangdong IPST Technology Co. Ltd. Duanzhou Zhaoqing China Guangdong Huamao Precision Manufacturing Co. Ltd. Dawang Zhaoqing China

Aiming at the defects of the traditional analog power adjustment and phase-locked control system of induction heating power supply, a novel digital power adjustment and digital phase-locked loop (DPLL) control strategy is proposed, and the control sequence diagram is also given. At the same time, with TMS320F28377 as the core, the control system of parallel resonant induction heating power supply based on digital signal processor (DSP) is designed to realize constant voltage, constant current and constant power control of induction heating system, so as to enhance the digital control of induction heating power supply. The experimental results show that the system has high heating efficiency, good reliability, remarkable effect and high practical value. © The Institution of engineering & Technology 2023.

关键词： Digital signal processors

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Modeling and Simulation of High Frequency and High Precision Multi Axis Cooperative control Based on Reinforcement Learning

Modeling and Simulation of High Frequency and High Precision...

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Computer, control and robotics (ICCCR), international conference on

作者： Haiyu Wang Zhuang Fu Jun Yan Zuohao Hua Yisheng Guan School of Mechanical Engineering Shanghai Jiao Tong University Shanghai China School of Electromechanical Engineering Guangdong University of Technology Guangzhou China

Reinforcement learning has attracted much attention in the field of mechanical control, but it has rarely been applied in projects requiring high precision and short control cycle. In order to realize the high frequency and high precision control of multi axis cooperative complex mechanism, this paper decouples and virtualizes the control system of a structure consisting of four valves, infers commands and send control signals at 500Hz, and controls the displacement precisely. The author modified the Proximal Policy Optimization algorithm and made some improvements in the updating rules and training environment, such as batch advantage normalization, attenuation of learning rate, strategy entropy reward, speed control reward, and addition of noise. Finally, the performance of the algorithm exceeded that of PID, ray-PPO in the simulation.

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Byte-Sized Reviewers: Exploring Review Generation through LNRG-S 3

Byte-Sized Reviewers: Exploring Review Generation through LN...

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2023 IEEE 3rd international conference on Data Science and Computer Application, ICDSCA 2023

作者： Li, Yiting Fu, Min Sun Yat-sen University School of Intelligent Systems Engineering Shenzhen China Macquarie University Department of Computing Sydney Australia

ISBN: (纸本)9798350341546

The development of network technology has led to an explosive growth of user-generated comments. These contents are based on users' experiences after using services and products, reflecting users' evaluations. Automatically generating high-quality and controllable sentiment comments can help creators improve work quality, help service providers enhance service levels, and improve consumers' consumption experience. However, current methods have some limitations. Seq2seq models have difficulty maintaining semantic consistency and generating long texts, LSTM can maintain a memory state and generate coherent text, but is prone to overfitting, generating repetitive text, and having difficulty establishing local coherence. N-gram models text locally but cannot understand the global context. This paper proposes a hybrid architecture, called LNRG-S (LSTM N-gram Reviews Generator with Sentiments), which combines LSTM and N-gram to model both global and local dependencies, and trains separate LSTM generators for positive and negative samples to control sentiment polarity of generated comments. We computed the perplexity of comments generated by different models. LNRG-S has 43.93% and 18.89% lower perplexity than LSTM and n-gram respectively, demonstrating that LNRG-S generates more fluent and coherent text. © 2023 IEEE.

关键词： LSTM n-gram Perplexity Sentiment control User-generated reviews

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Design of a delay dependent wide area damping controller using Cyber-Physical Power System architecture

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ENERGY REPORTS 2023年 9卷 510-517页

作者： Sun, Zhenglong Zhao, Jingbo Long, Hao Northeast Elect Power Univ Key Lab Modern Power Syst Simulat & Control & Rene Minist Educ Jilin 132012 Peoples R China Zhejiang Elect power Corp Lishui Power Supply Co Zhejiang 323000 Peoples R China

With the wide application of information and communication technology in power grids, the integration and collaboration of information networks and physical grid have become an essential feature of the smart grid, constituting a typical power information physical system. However, information network has communication time delay problem, which tends to deteriorate the system controller performance or even counter-tune, leading to system instability. To effectively reduce lowfrequency oscillation of the wide-area interconnected grid and overcome the negative impact of the communication network's delay problem, a delay dependent Wide Area Damping controller(WADC) is designed using cyber-physical power system architecture. First, we establish a power information physical system simulation platform based on Object linking and embedding for Process control (OPC) technology, implementing the joint operation of the power system simulation tool DIgSILENT and the information system simulation tool MATLAB. The platform can effectively respond to the system's information system and physical system interaction effects during simulation. Then, to compensate for communication delays in the power information physical system, this paper proposes a new WADC strategy that uses a Model Predictive controller (MPC) to generate control commands and an adaptive time delay compensator to compensate for the random communication delays generated in the communication. Finally, a case study with various uncertainties and through the interference test of a four-machine system and 39 bus system, the proposed control strategy is proposed. (c) 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： Cyber-physical system Time delay compensation Model predictive control

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PMSM sensorless control based on sliding mode control with fuzzy variable gain STA-SMO 3

PMSM sensorless control based on sliding mode control with f...

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3rd international conference on Electronics, Electrical and Information engineering, ICEEIE 2023

作者： Zhou, Li Nie, Yuqi Zhou, Yuepeng Nie, Huaizhi Faculty of Electrical and Control Engineering Liaoning Technical University Huludao China Shanxi Sunshine Power Generation Co. Yangquan China Fuxin Electric Power Supply Company State Grid Liaoning Electric Power CoLTD Fuxin China

ISBN: (纸本)9781510671423

A fuzzy variable-gain super-spiral sliding mode observer is proposed to address the problems of jitter and low estimation accuracy caused by the use of constant sliding mode gain in the traditional sliding mode observer (SMO). The fuzzy controller is introduced to replace the traditional observer with a fixed sliding mode gain by a variable sliding mode gain, and to improve the estimation accuracy and system robustness by online adjustment of the sliding mode gain. Secondly, to address the problems of large overshoot and slow response speed caused by the tacho loop PI controller in the traditional control system, a new convergence rate based tacho sliding mode controller is proposed to reduce the system overshoot and improve the response speed. The stability of the proposed sliding mode controller is proved by using Liapunov's stability theorem. Finally, Matlab/Simulink simulation is used to verify that the proposed improved control system has faster response speed, higher estimation accuracy and better system jitter suppression. © 2023 SPIE.

关键词： Fuzzy control

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