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3rd IEEE International Conference on Electrical Engineering, Big Data and Algorithms, EEBDA 2024

作者： Huang, Guorong Xu, Mingqi Zhong, Weijun Yang, Yali Air Force Engineering University Xi'an710051 China The 94655th People's Liberation Army Wuhu241007 China State Key Laboratory of Astronautic Dynamics Xi'an710043 China

ISBN: (纸本)9798350380989

In order to solve the problem of insufficient utilization of historical test data of platform inertial navigation system (PINS), a calibration parameter prediction method based on grey combination prediction model is proposed. Firstly, the acquired values of PINS calibration parameters are preprocessed, and then an improved Grey Markov Combinatorial Prediction Model (IMGM) with double background value optimization is proposed, and finally the reliability of the model prediction is verified by the actual calibration parameters data. The results show that the forecasting parameter values can provide data support for the performance evaluation, performance prediction and fault prompting of the inertial navigation system. © 2024 IEEE.

关键词： calibration parameters Grey Model Inertial navigation system Markov

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Research on calibration parameters of hydraulic impulse tools

Research on calibration parameters of hydraulic impulse tool...

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作者： Ren, Xiang Wang, Zhenyu Li, Haibin Li, Xiaodong Henan Institute of Metrology Zhengzhou China

This paper investigates the working principle of hydraulic impulse tools and, based on this principle and usage conditions, focuses on analysing the effects of air supply pressure, fastener torque rate, and extension rod on the tool's output torque. An experimental design was formulated to confirm the influence of these parameters on the tool's output torque. Based on the experimental data, it is recommended that these parameters be used as calibration standards for hydraulic impulse tools. © 2024

关键词： calibration parameters Hydraulic impulse tools Working principle

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Research on calibration parameters of hydraulic impulse tools

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Measurement: Sensors 2024年 38卷

作者： Ren, Xiang Wang, Zhenyu Li, Haibin Li, Xiaodong Henan Institute of Metrology Zhengzhou China

关键词： Hydraulic impulse tools Working principle calibration parameters

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Optimization Method of calibration parameters for Hybrid Electric Vehicle 33

Optimization Method of Calibration Parameters for Hybrid Ele...

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33rd Chinese Control and Decision Conference (CCDC)

作者： Li, Shenlong Liang, Weizhi Jia, Shuang Zeng, Xiaohua Yun, Qianrui China North Vehicle Res Inst Sci & Technol Vehicle Transmiss Lab Beijing 100072 Peoples R China Jilin Univ State Key Lab Automot Simulat & Control Changchun 130025 Peoples R China

ISBN: (纸本)9781665440899

In order to solve the problems of cumbersome calibration process and the inability of calibration parameters to meet the requirements of different driving cycles, an optimization method of calibration parameters is proposed. A hybrid electric bus is taken as the research object, and the power threshold is regarded as the calibration parameter to be optimized. In order to study the relationship between calibration parameter and driving cycles, one hundred new driving cycles are constructed based on the common driving cycles of bus. Twenty four characteristic parameters are screened to represent these driving cycles. In order to improve the fuel economy of hybrid electric vehicle, the minimum energy loss of the system is taken as the optimization target to solve the optimal power threshold. Then, the linear relationship between the optimal power threshold and these characteristic parameters is found through regression analysis. The optimal power thresholds under different driving cycles can be obtained by the regression equation. The research in this paper improves the adaptability of calibration parameters to different driving cycles, and shortens the development cycle of the vehicle controller. The solution method of the optimal calibration parameter is also of great significance to the fuel-saving control of hybrid electric vehicle.

关键词： Hybrid Electric Vehicle Characteristic parameters of Driving Cycle calibration parameters Regression Analysis

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Optimization Method of calibration parameters for Hybrid Electric Vehicle

Optimization Method of Calibration Parameters for Hybrid Ele...

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第33届中国控制与决策会议

作者： Shenlong Li Weizhi Liang Shuang Jia Xiaohua Zeng Qianrui Yun Science and Technology on Vehicle Transmission Laboratory China North Vehicle Research Institute State Key Laboratory of Automotive Simulation and Control Jilin University

In order to solve the problems of cumbersome calibration process and the inability of calibration parameters to meet the requirements of different driving cycles,an optimization method of calibration parameters is proposed.A hybrid electric bus is taken as the research object,and the power threshold is regarded as the calibration parameter to be *** order to study the relationship between calibration parameter and driving cycles,one hundred new driving cycles are constructed based on the common driving cycles of *** four characteristic parameters are screened to represent these driving *** order to improve the fuel economy of hybrid electric vehicle,the minimum energy loss of the system is taken as the optimization target to solve the optimal power ***,the linear relationship between the optimal power threshold and these characteristic parameters is found through regression *** optimal power thresholds under different driving cycles can be obtained by the regression *** research in this paper improves the adaptability of calibration parameters to different driving cycles,and shortens the development cycle of the vehicle *** solution method of the optimal calibration parameter is also of great significance to the fuel-saving control of hybrid electric vehicle.

关键词： Hybrid Electric Vehicle Characteristic parameters of Driving Cycle calibration parameters Regression Analysis

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Triaxial elastoplastic damage constitutive model of unreinforced clay brick masonry wall

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Earthquake Engineering and Engineering Vibration 2023年第1期22卷 157-172页

作者： Wu Biye Dai Junwu Bai Wen Yang Yongqiang Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina EarthquakeAdministrationHarbin 150080China Key Laboratory of Earthquake Disaster Mitigation Ministry of Emergency ManagementHarbin 150080China

Due to differences in the properties of composition materials and construction techniques,unreinforced masonry is characterized by low strength,anisotropy,nonuniformity,and low *** order to accurately simulate the mechanical behavior of unreinforced brick masonry walls under static and dynamic loads,a new elastoplastic damage constitutive model was proposed and the corresponding subroutine was developed based on the concrete material constitutive *** the proposed constitutive model,the Rankine strength theory and the Drucker-Prager strength theory were used to define the tensile and compressive yield surface function of materials,***,the stress updating algorithm was modified to consider the tensile plastic permanent deformation of masonry *** verify the accuracy of the proposed constitutive model,numerical simulations of the brick masonry under monotonic and cyclic uniaxial tension and compression loads were carried *** among the numerical and theoretical and experimental results show that the proposed model can properly reflect the masonry material mechanical ***,the numerical models of four pieces of masonry walls with different mortar strengths were *** cyclic loadings were applied and the results show that the proposed constitutive model can properly simulate the wall shear failure characteristics,and the force-displacement hysteretic curves obtained by numerical simulation are in good agreement with the ***,the proposed elastic-plastic damage constitutive model can simulate the nonlinear behavior of unreinforced brick masonry walls very well,and can be used to predict the structural response of masonry walls.

关键词： brick masonry elastoplastic model calibration parameters numerical simulation damage variable

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Site response analysis using true coupled constitutive models for liquefaction triggering

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EARTHQUAKES AND STRUCTURES 2023年第1期25卷 27-41页

作者： Mendoza-Bolanos, Cristhian C. Salas-Montoya, Andres -Torres, Oscar H. Moreno Andrade, Arturo I. Villegas- Univ Nacl Colombia Dept Civil Engn Manizales Colombia Univ Cooperat Colombia Dept Civil Engn Santa Marta Colombia Univ Magdalena Dept Civil Engn Santa Marta Colombia

This study focused on nonlinear effective stress site response analysis using two coupled constitutive models, that is, the DM model (Dafalias and Manzari 2004), which incorporated a simple plasticity sand model accounting for fabric change effects, and the PMDY03 model (Khosravifar et al. 2018), that is, a 3D model for earthquake-induced liquefaction triggering and postliquefaction response. A detailed parametric study was conducted to validate the effectiveness of nonlinear site response analysis and porewater pressure (PWP) generation through a true coupled formulation for assessing the initiation of liquefaction at ground level. The coupled models demonstrated accurate prediction of liquefaction triggering, which was in line with established empirical liquefaction triggering relations in published databases. Several limitations were identified in the evaluation of liquefaction using the cyclic stress method, despite its widespread implementation for calculating liquefaction triggering. Variations in shear stiffness, represented by changes in shear wave velocity (Vs1), exerted the most significant influence on site response. The study further indicated that substantial differences in response spectra between nonlinear total stress and nonlinear effective stress analyses primarily occurred when liquefaction was triggered or on the verge of being triggered, as shown by excess PWP ratios approaching unity. These differences diminished when liquefaction occurred towards the later stages of intense shaking. The soil response was predominantly influenced by the higher stiffness values present prior to liquefaction. A key contribution of this study was to validate the criteria used to assess the triggering of level-ground liquefaction using true coupled effective-stress constitutive models, while also confirming the reliability of numerical approximations including the PDMY03 and DM models. These models effectively captured the principal characteristics of liquefaction

关键词： calibration parameters CRR parametric study porewater pressure unidirectional shaking

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Unidirectional cyclic shearing of sands: Evaluation of three different constitutive models

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GEOMECHANICS AND ENGINEERING 2023年第4期35卷 449-464页

作者： Moreno-Torres, Oscar H. Mendoza-Bolanos, Cristhian Salas-Montoya, Andres Univ Nacl Colombia Dept Civil Engn Sede Manizales Colombia Univ Cooperat Colombia Dept Civil Engn Santa Marta Colombia Univ Magdalena Dept Ind Engn St Marta Colombia

Advanced nonlinear effective stress constitutive models are started to be frequently used in one-dimensional (1D) and two-dimensional (2D) site response analysis for assessment of porewater generation and liquefaction potential in soft soil deposits. The emphasis of this research is on the assessment of the implementation of this category of models at the element stage. Initially, the performance of a coupled porewater pressure (PWP) and constitutive models were evaluated employing a catalogue of 40 unidirectional cyclic simple shear tests with a variety of relative densities between 35% and 80% and effective vertical stresses between 40 and 80 kPa. The authors evaluated three coupled constitutive models (PDMY02, PM4SAND and PDMY03) using cyclic direct simple shear tests and for decide input parameters used in the model, procedures are recommended. The ability of the coupled model to capture dilation as strength is valuable because the studied models reasonably capture the cyclic performance noted in the experiments and should be utilized to conduct effective stress-based 1D and 2D site response analysis. Sandy soils may become softer and liquefy during earthquakes as a result of pore-water pressure (PWP) development, which may have an impact on seismic design and site response. The tested constitutive models are mathematically coupled with a cyclic strain-based PWP generation model and can capture small-strain stiffness and large-strain shear strength. Results show that there are minor discrepancies between measured and computed excess PWP ratios, indicating that the tested constitutive models provide reasonable estimations of PWP increase during cyclic shear (ru) and the banana shape is reproduced in a proper way indicating that dilation and shear- strain behavior is well captured by the models.

关键词： calibration parameters coupled constitutive models element test simulation

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calibration of Microsimulation Models – The Effect of calibration parameters Errors in the Models’ Performance

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Transportation Research Procedia 2014年 3卷 962-971页

作者： Miguel Figueiredo Álvaro Seco Ana Bastos Silva CITTA Department of Civil Engineering University of Coimbra Rua Luís Reis Santos - Pólo II da Universidade 3030-788 Coimbra Portugal

Microsimulation models are now widely used. However, the capacity of a model to represent the reality with high level of accuracy depends significantly on the calibration process. This paper presents a sensitivity analysis to test how the expected accuracy of the traffic microsimulation models’ outputs can be affected by different errors’ types and degrees in the estimation of calibration parameters. Using Aimsun software it was possible to establish different relations between the level of the calibration parameters errors, and the corresponding errors in the simulated results. The significant importance of the “reaction time” and “minimum distance between vehicles” was confirmed.

关键词： microsimulation AIMSUN calibration calibration parameters errors accuracy

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Estimation of time delay functions for design of traffic systems

EXAMPLES AND COUNTEREXAMPLES

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EXAMPLES AND COUNTEREXAMPLES 2024年 6卷

作者： Hossam, N. Gazder, U. Univ Bahrain Dept Civil Engn Sakhir Bahrain

Main aim of this research was to apply multiple approaches for the development of time delay functions on three highways in Bahrain, namely;Dry Dock Highway, Arad Highway and Zallaq Highway. Four equations were obtained from previous studies and two equations were, additionally, tailored for each of the three highways. The results were used to obtain two parameters that aid in design, optimum flow rate and level of service.

关键词： Capacity Delay calibration parameters Linear regression Optimum flow rate Level of service

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