scholarly journals A virtual test bench for determining the loads in the air suspension of the rear trolley of a truck at the early stages of design

2021 ◽  
Vol 1 (3) ◽  
pp. 76-86
Author(s):  
R.O. Maksimov ◽  
◽  
I.V. Chichekin ◽  
Keyword(s):  
Mathematical Model ◽  
Test Bench ◽  
Software Tools ◽  
Rigid Bodies ◽  
Virtual Test ◽  
Early Stages ◽  
Air Suspension ◽  
Solid Suspension ◽  
Suspension Model ◽  
Standard Software

To determine the maximum loads acting in the rear air suspension of a truck at the early stages of design there was used computer modeling based on solving equations of dynamics of solids and implemented in the Recurdyn software. The components of the developed virtual test bench, includ-ing hinges, power connections, drive axles, a wheel-hub assembly with a wheel and a support plat-form, are considered in detail. The test bench is controlled using a mathematical model created in the environment for calculating the dynamics of rigid bodies and associated with a solid suspension model by standard software tools of the application. The test bench is controlled using a mathemati-cal model created in the environment for calculating the dynamics of rigid bodies and associated with a solid suspension model by standard software tools of the application. The use of such a test bench makes it possible to determine the loads in the hinges and power connections of the suspen-sion, to determine the mutual positions of the links for each load mode, to increase the accuracy of the calculation of loads in comparison with the flat kinematic and force calculation. The mathemati-cal model of the virtual test bench allows to carry out numerous parametric studies of the suspension without the involvement of expensive full-scale prototypes. This makes it possible at the early stages of design to determine all hazardous modes, select rational parameters of the elements, and reduce design costs. The paper shows the results of modeling the operation of a virtual test bench with an air suspen-sion in the most typical loading modes, identifying the most dangerous modes. The efficiency and adequacy of the mathematical model of the suspension was proved. Examples of determining the force in all the joints of the structure, the choice of maximum loads for design calculations when designing the air suspension of vehicle were shown.

scholarly journals Numerical Investigation of a Wood-Chip Downdraft Gasifier

2019 ◽  
Vol 113 ◽  
pp. 01002
Author(s):  
Alessandro Vulpio ◽  
Nicola Casari ◽  
Mirko Morini ◽  
Michele Pinelli ◽  
Alessio Suman
Keyword(s):  
Numerical Model ◽  
Test Bench ◽  
Wood Chip ◽  
Biomass Gasification ◽  
Careful Analysis ◽  
Good Match ◽  
Energy Field ◽  
Downdraft Gasifier ◽  
Virtual Test ◽  
Working Parameters

Biomass gasification is regarded as one of the most promising technology in the renewable energy field. The outcome of such operation, i.e. the synfuel, can be exploited in several ways, for example powering engines and turbines, and is considered more flexible than the biomass itself. For this reason, a careful analysis of the gasification performance is of paramount importance for the optimization of the process. One of the techniques that can be used for such a purpose, is the numerical analysis. CFD is indeed a tool that can be of great help in the design and study of the operation of the gasifier, allowing for an accurate prediction of the operating parameters. In this work, a downdraft gasifier is considered, and the biomass is made of wood chip. The present analysis is devoted to build the numerical model and simulate all the reactions that happen inside an actual gasifier, considering the drying of the wood chip, heating, pyrolysis, and combustion. Good match with experimental results is found, making the numerical model here presented a reliable virtual test bench where investigating the effects of variation in the working parameters.

scholarly journals On-Line Open-Phase Fault Detection Method for Switched Reluctance Motors with Bus Current Measurement

Actuators ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 117
Author(s):  
Alejandra de la Guerra ◽  
Victor M. Jimenez-Mondragon ◽  
Lizeth Torres ◽  
Rafael Escarela-Perez ◽  
Juan C. Olivares-Galvan
Keyword(s):  
Test Bench ◽  
Angular Position ◽  
Current Measurement ◽  
Switched Reluctance Motors ◽  
Switched Reluctance ◽  
Virtual Test ◽  
Open Phase ◽  
On Line ◽  
Different Sources ◽  
A Current

This article introduces an on-line fault diagnosis (FD) system to detect and recognize open-phase faults in switched reluctance motors (SRMs). Both tasks, detection and recognition, are based on functions built with the same information but from different sources. Specifically, these functions are constructed from bus current measurement provided by a sensor and from the estimate of such a current provided by an extended Kalman filter (EKF) that performs the estimation from only rotor angular position measurements. In short, the FD system only requires two measurements for employment: bus current and angular position. In order to show its efficacy, results from numerical simulations (performed in a virtual test bench) are presented. Specifically, these simulations involve the dynamics of the SRM, including the magnetic phenomena caused by the analyzed faults. The motor dynamics were obtained with finite element simulations, which guarantee results close to the actual ones.

scholarly journals Virtual test bench for determining loads affecting an automotive steering system

2017 ◽  
Author(s):  
Д.С. Вдовин ◽  
◽  
И.В. Чичекин ◽  
Т.Д. Поздняков ◽  
◽  
...  
Keyword(s):  
Test Bench ◽  
Steering System ◽  
Virtual Test

scholarly journals Development of virtual benches for testing the digital twin of a vehicle

2021 ◽  
Vol 284 ◽  
pp. 06006
Author(s):  
Pavel Cvetkov ◽  
Elena Zhilenkova ◽  
Anton Zhilenkov
Keyword(s):  
Power Plant ◽  
Automotive Industry ◽  
Test Bench ◽  
Vehicle Body ◽  
Passive Safety ◽  
Body Frame ◽  
Cooling Systems ◽  
Digital Platform ◽  
Digital Twin ◽  
Virtual Test

The article analyzes the approaches to the creation of the concept of a virtual test bench for testing the digital twin of the automotive industry product. Such components of the digital platform as suspension area, power plant, braking and cooling systems are being investigated. The problem of the implementation in the digital twin of such important units as the attachment points of units and assemblies on the vehicle body frame, even surface, driver dummy, the scheme of attachment of body elements, etc is studied. The importance of the implementation of such benches as platforms for assessing the indicators of the vehicle passive safety or as stand for assessing the water tightness of the vehicle body is considered. A number of results that illustrate development areas and success of the authors of the article in these areas are presented. It is shown that the digital platform can be used for certification and rating tests, assessing the comfort and visibility of the driver's cab.

The Concept of a Multi-Level Optimization Model of the Centrifugal Compressor Workflow

2019 ◽  
Author(s):  
Grigorii M. Popov ◽  
Igor Egorov ◽  
Evgenii Marchukov ◽  
Andrei A. Volkov ◽  
Oleg V. Baturin
Keyword(s):  
Centrifugal Compressor ◽  
Test Bench ◽  
Compressor Stage ◽  
Order Of Accuracy ◽  
Virtual Test ◽  
Successful Testing ◽  
Multi Level ◽  
High Order Of Accuracy ◽  
Using Data ◽  
Main Ideas

Abstract The paper presents the main ideas of the virtual test bench concept for rapid obtaining of the reliable characteristics of compressors based on a multi-level mathematical model with a two-step identification using data obtained from mathematical models with a high order of accuracy. One of the possible identification algorithms and the results of its successful testing are given on the example of a centrifugal compressor stage developed and tested at NASA.

Development of a Comprehensive Virtual Test Bench Aimed at Photovoltaic Inverters

2021 ◽  
Vol 19 (12) ◽  
pp. 2097-2104
Author(s):  
Jose Luis Salgado Doroteo ◽  
Jorge Hugo Calleja Gjumlich ◽  
Jesus Dario Mina Antonio
Keyword(s):  
Test Bench ◽  
Virtual Test

A Virtual Test Bench to Study Transport Phenomena in 3D Porous Scaffolds Using Lattice Boltzmann Simulations

2013 ◽  
Author(s):  
Francesco Pennella ◽  
Piergiorgio Gentile ◽  
Marco A. Deriu ◽  
Diego Gallo ◽  
Alessandro Schiavi ◽  
...  
Keyword(s):  
Porous Media ◽  
Lattice Boltzmann ◽  
In Silico ◽  
Test Bench ◽  
Cell Attachment ◽  
Transport Phenomena ◽  
Bone Tissue Regeneration ◽  
Porous Scaffolds ◽  
Friction Forces ◽  
Virtual Test

In tissue engineering (TE), scaffolds are widely used to provide a suitable and native-like environment for cell growth, organization, and proliferation. Microstructure of TE scaffolds is fundamental to the cell attachment and in-depth penetration, in conjunction with biological factors as cell seeding and nutrients supply. In particular, several studies have established that an adequate transport of nutrient through the scaffold is fundamental for culturing cells [1]. Hence, the easiness at which fluids/species move through the scaffold and friction forces exherted from fluid motion, have a marked impact in TE processes [2]. Mass transport through scaffolds is a phenomenon that can be described at different scales, the molecular level (nanoscale), the single-pore dimension level (microscale) and the whole-sample level (macroscale). In this work we present a virtual test bench where realistic 3D models of porous TE scaffolds are reconstructed from micro-CT images and the transport phenomena through them is simulated in silico by applying the Lattice Boltzmann Method (LBM). The final aim is to create an effective in silico tool suitable to study and optimize transport phenomena of porous scaffolds. The application of the LBM is justified by its versatility in simulating flows in irregular porous media (i.e. simplicity of handling complex boundaries) and in providing insights into transport properties such as permeability [3–4] and physical quantities as the shear stress, which are barely achievable experimentally [2]. Here, the virtual tool is applied to evaluate the performance of three biomimetic bioactive glass/polymer composite porous scaffolds for bone tissue regeneration with well-known mechanical and chemical properties, but never characterized in terms of transport phenomena. The in silico results are macroscopically validated in terms of permeability (kC) by comparison with experimental permeability (kE) measurements obtained by means of a dedicated test bench, very recently proposed for the characterization of porous media [5].

scholarly journals A Virtual Test Bench of a Parallel Hybrid Propulsion System for UAVs

Aerospace ◽  
2019 ◽  
Vol 6 (7) ◽  
pp. 77 ◽  
Author(s):  
Luca Boggero ◽  
Sabrina Corpino ◽  
Andrea De Martin ◽  
Giuseppe Evangelista ◽  
Marco Fioriti ◽  
...  
Keyword(s):  
Test Bench ◽  
Propulsion System ◽  
Real System ◽  
Hybrid Propulsion ◽  
The Real ◽  
Virtual Test ◽  
Parallel Hybrid ◽  
Time Histories ◽  
Angular Velocities ◽  
Dynamic Relationships

The article proposes the design of a test bench simulator to test a parallel hybrid propulsion architecture for aeronautical applications. The virtual test bench simulates, in a scaled version, the real test bench, designed for a power of about 0.4 MW. After presenting the architecture of the real propulsion system, the virtual test bench is described. The real system is basically composed by a paralleled electric motor and thermal engine which provide mechanical power to the propeller. Saving cost and volume the test bench is composed by electric motors simulates the behaviors of the real propulsion system despite their differences. The dynamic relationships expressing the transmission of torque between the components, and the method of down-sizing the power delivered are highlighted. Particular attention is given to the real inertia actions that must be simulated on the virtual test bench. An application of the proposed methodology is then presented through the simulation of the take-off phase, and the torque time histories, angular velocities and powers generated on the virtual test bench are used to verify the corresponding time histories expected in the real system.

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