scholarly journals On the Benefits of Using Object-Oriented Programming for the Objective Evaluation of Vehicle Dynamic Performance in Concurrent Simulations

Machines ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 41 ◽  
Author(s):  
Michele Perrelli ◽  
Francesco Cosco ◽  
Giuseppe Carbone ◽  
Basilio Lenzo ◽  
Domenico Mundo
Keyword(s):  
Dynamic Performance ◽  
Safety Evaluation ◽  
Object Oriented ◽  
Objective Evaluation ◽  
Steering System ◽  
Simulation Software ◽  
Object Oriented Programming ◽  
Vehicle Dynamic ◽  
Passenger Cars ◽  
Concurrent Simulations

Assessing passenger cars’ dynamic performance is a critical aspect for car industries, due to its impact on the overall vehicle safety evaluation and the subjective nature of the involved handling and comfort metrics. Accordingly, ISO standards, such as ISO 4138 and ISO 3888, define several specific driving tests to assess vehicle dynamics performance objectively. Consequently, proper evaluation of the dynamic behaviour requires measuring several physical quantities, including accelerations, speed, and linear and angular displacements obtained after instrumenting a vehicle with multiple sensors. This experimental activity is highly demanding in terms of hardware costs, and it is also significantly time-consuming. Several approaches can be considered for reducing vehicle development time. In particular, simulation software can be exploited to predict the approximate behaviour of a vehicle using virtual scenarios. Moreover, motion platforms and detail-scalable numerical vehicle models are widely implemented for the purpose. This paper focuses on a customized simulation environment developed in C++, which exploits the advantages of object-oriented programming. The presented framework strives to perform concurrent simulations of vehicles with different characteristics such as mass, tyres, engine, suspension, and transmission systems. Within the proposed simulation framework, we adopted a hierarchical and modular representation. Vehicles are modelled by a 14 degree-of-freedom (DOF) full-vehicle model, capable of capturing the dynamics and complemented by a set of scalable-detail models for the remaining sub-systems such as tyre, engine, and steering system. Furthermore, this paper proposes the usage of autonomous virtual drivers for a more objective evaluation of vehicle dynamic performances. Moreover, to further evaluate our simulator architecture’s efficiency and assess the achieved level of concurrency, we designed a benchmark able to analyse the scaling of the performances with respect to the number of different vehicles during the same simulation. Finally, the paper reports the proposed simulation environment’s scalability resulting from a set of different and varying driving scenarios.

Multi-Train Movement Simulation Using MATLAB Object-Oriented Programming

2015 ◽  
Vol 763 ◽  
pp. 153-158 ◽  
Author(s):  
Chaiyut Sumpavakup ◽  
Thanatchai Kulworawanichpong
Keyword(s):  
Dynamic Performance ◽  
Object Oriented ◽  
Object Oriented Programming ◽  
Mode Ii ◽  
Mode Iii ◽  
Transit System ◽  
Power Sources ◽  
Operating Modes ◽  
Dc Power ◽  
Movement Simulation

This paper is to demonstrate the use of MATLAB Object-Oriented Programming (OOP) for developing Multi-Train Movement Simulation (MTMS). Dynamic performance of the train movement is modeled with the help of Newton’s law of motion. Train movement in this work is based on a sequence of four operating modes: i) accelerating mode, ii) constant speed or cruising mode, iii) coasting mode and iv) braking mode. The design concept of a train movement class is described with its properties and methods. To evaluate its use, the proposed train movement simulator developed here is tested against Bangkok Transit System (BTS) – Sky Train Silom Line. This system has the service distance of 13-km and is fed by seven 750-V DC power sources through its 3rd rail. The results showed the effectiveness of the proposed simulator.

The Pure Electric Vehicle Dynamic Performance Simulation

2012 ◽  
Vol 260-261 ◽  
pp. 353-356 ◽  
Author(s):  
Zhi Zhang ◽  
Min Rui Guo ◽  
Pei Zhang
Keyword(s):  
Electric Vehicle ◽  
Working Conditions ◽  
Dynamic Performance ◽  
Simulation Software ◽  
System Structure ◽  
Vehicle Dynamic ◽  
Performance Simulation ◽  
Electric Car ◽  
Vehicle Simulator ◽  
Simulation Results

Modeling and simulation technology is the key technical one of researching and developing pure electric car. Firstly analyzes system structure of the simulation software ADVISOR (Advanced Vehicle Simulator), use ADVISOR to model and simulate the dynamic performance of the pure electric vehicle. And then take a pure electric vehicle for example, mainly simulate the dynamic performance in the way of the typical working conditions CYC_UDDS, and compare dynamic performance simulation results under two different transmission, optimalize dynamic performance of pure electric vehicle.

scholarly journals Battery group parameter selection and dynamic simulation of pure electric vehicle

2018 ◽  
Vol 179 ◽  
pp. 01004
Author(s):  
Guo Minrui ◽  
Cheng Lei
Keyword(s):  
Electric Vehicle ◽  
Dynamic Performance ◽  
Resistance Coefficient ◽  
Simulation Software ◽  
Vehicle Design ◽  
Vehicle Dynamic ◽  
Driving Speed ◽  
Group Parameter ◽  
Air Resistance ◽  
Core Components

The battery pack is one of the core components of pure electric vehicle, dynamic performance of the whole vehicle is closely related to the matching design of the battery, and is affected by the air resistance coefficient and the windward area of the whole vehicle. The dynamic indicators include maximum driving speed, 0-100km/h acceleration time and climbing grade, the battery parameters are designed and matched before the vehicle design, mainly analyze influence on the vehicle dynamic performance of the types of batteries, air resistance coefficient, windward area by the simulation software ADVISOR, and optimize the combination of these parameters. The results show that the dynamic performance of the vehicle reaches the initial design index and the dynamic performance of the vehicle is improved significantly.

Computer Simulation of Drying Process in Tube Rotary Dryer

2012 ◽  
Vol 201-202 ◽  
pp. 617-620
Author(s):  
Hua Bo He
Keyword(s):  
Heat Transfer ◽  
Computer Simulation ◽  
Object Oriented ◽  
Simulation Software ◽  
Object Oriented Programming ◽  
Transfer Model ◽  
Drying Process ◽  
Rotary Dryer ◽  
Windows Xp ◽  
Actual Test

With the particle transfer model and object-oriented programming method, the initiatory computer simulation software of indirect drying process is developed in windows XP system and MFC environment. The overall coefficient of heat transfer in the drying process and the changes of material humidity and temperature between the inlet and outlet are calculated by the simulation software. The actual test data verify that the computer simulation software is convenient, effective and reliable.

Development of A Novel Integrated Corner Module for Narrow Urban Vehicles

2018 ◽  
Vol 233 (3) ◽  
pp. 548-556 ◽  
Author(s):  
Mohammad-Amin Rajaie ◽  
Amir Khajepour ◽  
Alireza Pazooki ◽  
Amir Soltani
Keyword(s):  
Dynamic Performance ◽  
Steering System ◽  
Linkage Mechanism ◽  
Passenger Cars ◽  
Customer Acceptance ◽  
Steering Mechanism ◽  
Kingpin Axis ◽  
Compact Design ◽  
Four Bar Linkage ◽  
First Time

Most current urban vehicles are scaled-down versions of standard passenger cars. This imposes serious limitations on the safety, comfort, efficiency, dynamic performance and, hence, customer acceptance of the vehicle. This paper provides a unique design of an integrated corner module including an in-wheel suspension, an electrical in-wheel motor, a friction brake, a steering system, and a camber mechanism, which can be used in any urban vehicle design without modification. For the first time, a dual four-bar linkage mechanism has been designed to generate a virtual kingpin axis and provide an active camber. This approach results in a highly compact design for the corner module that can be integrated into narrow vehicles. A full-size prototype of the proposed integrated corner module has been fabricated and tested to validate the new steering mechanism and the integrated corner module characteristics.

The Computerized Simulation Software Development of the Pneumatic DTH

2011 ◽  
Vol 317-319 ◽  
pp. 2113-2117 ◽  
Author(s):  
Qing Shan Xiong ◽  
Jia Li ◽  
Shuang Liang Liu ◽  
Fan Jiu Kong ◽  
Yong Sheng Ye
Keyword(s):  
Operating Performance ◽  
Object Oriented ◽  
Simulation Software ◽  
Object Oriented Programming ◽  
Performance Parameters ◽  
Development Environment ◽  
Ergodic Method ◽  
Air Chamber ◽  
Work Mechanism ◽  
Computerized Simulation

Designing the pneumatic DTH by the method of anology, experience and actual test, the investment is large, the cycle is long, and it is difficult to achieve the optimization. In order to research profoundly the DTH work mechanism and describe piston movement laws in detail, physical model is established according to the actual conditions, finite difference method is adopted, thermodynamics and kinematics are applied. Using object-oriented programming, the pneumatic DTH computerized simulation software is developed whose integrated development environment is VB. The software can calculate acceleration, velocity, displacement, pressure, temperature of the front and back air chamber at any time and the operating performance parameters of the pneumatic DTH. The law of many factors influencing on the pneumatic DTH performance can be found and the optimization of the pneumatic DTH structure parameter can be achieved by the ergodic method. Not only the pneumatic DTH but also the no-dig impactor is designed by computerized simulation.

PROJECT ON ELECTRONIC STEERING SYSYTEM

2018 ◽  
Vol 4 (5) ◽  
pp. 7
Author(s):  
Shivam Dwivedi ◽  
Prof. Vikas Gupta
Keyword(s):  
Steering System ◽  
Essential Elements ◽  
Variable Pressure ◽  
Passenger Cars ◽  
Control Techniques ◽  
Steering Mechanism ◽  
Dynamics And Control ◽  
Active Research ◽  
Electronic Steering ◽  
And Control

As the four-wheel steering (4WS) system has great potentials, many researchers' attention was attracted to this technique and active research was made. As a result, passenger cars equipped with 4WS systems were put on the market a few years ago. This report tries to identify the essential elements of the 4WS technology in terms of vehicle dynamics and control techniques. Based on the findings of this investigation, the report gives a mechanism of electronically controlling the steering system depending on the variable pressure applied on it. This enhances the controlling and smoothens the operation of steering mechanism.

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