scholarly journals Dynamic analysis of small gasoline car model powertrain using MATLAB / SIMDRIVELINE

2021 ◽  
Vol 3 (SI2) ◽  
pp. first
Author(s):  
TRAN Huu Nhan ◽  
NGUYEN Ngoc Thanh ◽  
VO Ba Khanh Trinh ◽  
NGUYEN Van Nguyen
Keyword(s):  
Gasoline Engine ◽  
Dynamic Performance ◽  
Vehicle Model ◽  
Mathematical Basis ◽  
Technical Parameters ◽  
Powertrain System ◽  
Simulation Calculation ◽  
Engine Clutch ◽  
The Time Domain ◽  
Simulation Problem

The powertrain model of a vehicle using a small gasoline engine is designed based on the analysis results of the Matlab/Simdriveline simulation model. In which, the vehicle's powertrain model parts include: engine, clutch, gearbox, differential and wheels, and overall vehicle modeled by Matlab/ Simdriveline. Mathematical basis of the corresponding models for systems or components are used to build simulated models for the entire vehicle's powertrain system. The input parameters for the simulation problem include parameters of the size, mass, structural and technical parameters of each system such as transmission ratio, power, velocity, efficiency, determined based on actual vehicle model and empirical calculations. The simulation calculation process is done on the basis of the variation of the engine power, from which, the corresponding input and output kinetic and dynamic parameters of each system in the powertrain system consists of clutch, gearbox, differential, are obtained in the time domain. The results of simulation calculation of the kinematics and dynamics of each system in the vehicle's powertrain are analyzed as a basis for design improvement to improve the dynamic performance of the vehicle model.

scholarly journals Simulation of Differentials in Four-Wheel Drive Vehicles Using Multibody Dynamics

2011 ◽  
Author(s):  
Geoffrey Virlez ◽  
Olivier Bru¨ls ◽  
Pierre Duysinx ◽  
Nicolas Poulet
Keyword(s):  
Test Bench ◽  
Good Accuracy ◽  
Dynamic Performance ◽  
Nonlinear Finite Element Method ◽  
Vehicle Model ◽  
Contact Conditions ◽  
Flexible Bodies ◽  
Wheel Drive ◽  
Complex Phenomena ◽  
Four Wheel Drive

The dynamic performance of vehicle drivetrains is significantly influenced by differentials which are subjected to complex phenomena. In this paper, detailed models of TORSEN differentials are presented using a flexible multibody simulation approach, based on the nonlinear finite element method. A central and a front TORSEN differential have been studied and the numerical results have been compared with experimental data obtained on test bench. The models are composed of several rigid and flexible bodies mainly constrainted by flexible gear pair joints and contact conditions. The three differentials of a four wheel drive vehicle have been assembled in a full drivetrain in a simplified vehicle model with modeling of driveshafts and tires. These simulations enable to observe the four working modes of the differentials with a good accuracy.

Sound & vibration control for a single-cylinder gasoline engine based on parameter optimization of timing-chain system

2017 ◽  
Vol 232 (13) ◽  
pp. 1815-1827
Author(s):  
Xianjun Hou ◽  
Songze Du ◽  
Chihua Lu ◽  
Zien Liu ◽  
Hao Zheng ◽  
...  
Keyword(s):  
Optimization Design ◽  
Gasoline Engine ◽  
Subjective Evaluation ◽  
Dynamic Performance ◽  
Transverse Displacement ◽  
Single Cylinder ◽  
Chain System ◽  
Design Scheme ◽  
Single Cylinder Engine ◽  
Timing System

In order to promote the idling noise quality of a single-cylinder gasoline engine, this paper addresses sound source identification and noise control research. The noise was identified by the application of subjective evaluation, acoustic spectrum and sound intensity analysis. It was found that the noise was caused by the anomalous dynamic performance of the timing system under idling conditions. Furthermore, sound and vibration characteristics of timing system were improved by design methodology research of key components. A multi-body dynamic model was established to characterize dynamic characteristics of the timing system under idling conditions. The key factor of producing noise was that the fluctuation of contact force between the chain and guide and transverse displacement of the chain were much higher than those of the allowable design limit. For the lowest design alternation and manufacturing costs, the work analyzed six timing system improvement schemes obtained by cross combination of tensioner blade line and guide strip radian parameters. After that, the optimal design scheme which could improve dynamic performance parameters of the timing system was derived. The design scheme was conducted with a acoustic test of engine to derive the following results. The noise level of a single-cylinder engine under idling conditions decreased by 3 dB(A). The abnormal noise of the original engine was eliminated under subjective evaluation. The sound quality under other working conditions had no apparent deterioration. Research shows that guide and tensioner blade line optimization design could improve dynamic performance of the timing chain system to eliminate abnormal noise, thereby significantly improving the acoustic characteristic of a single-cylinder engine.

Analysis and Calculation of Electromagnetic Torque for the Voltage Source Traction Motors

2013 ◽  
Vol 446-447 ◽  
pp. 672-677
Author(s):  
Xiao Yu Wu ◽  
Zhe Ming Chen ◽  
Ze Hao Huang
Keyword(s):  
High Speed ◽  
Dynamic Performance ◽  
Voltage Source ◽  
Electromagnetic Torque ◽  
Motor Speed ◽  
Traction Motor ◽  
Traction Motors ◽  
Vehicle System ◽  
Mathematical Formulas ◽  
The Time Domain

The traction motor installed on the high-speed train is powered by inverter. A large number of harmonics may appear when motor is operating. Then the motor speed generate oscillation and finally the dynamic characteristic is affected in vehicle system. In this paper, relied on the electromagnetism of traction motor, the mechanism about emerging harmonic torque is analyzed. In addition, based on the equivalent circuit, the method of calculating the parameters in harmonic circuit is proposed. Two mathematical formulas are also proposed to obtain the fundamental electromagnetic torque and the harmonic electromagnetic torque on traction motor. The time domain and frequency domain distributions of the torques are gained and analyzed. Finally a calculation example of traction motor harmonic torque was analyzed and calculated, and prepared for further study of harmonic torque impacting on vehicle system dynamic performance.

A Novel Acceleration/Deceleration Control Algorithm for High Precision Feed Motion System

2012 ◽  
Author(s):  
Kun Cao ◽  
Wanhua Zhao ◽  
Hui Liu ◽  
Xiaojun Yang ◽  
Jun Zhang
Keyword(s):  
Dynamic Performance ◽  
Tracking Error ◽  
Transient State ◽  
Servo Control ◽  
Cnc System ◽  
Motion System ◽  
Servo Control System ◽  
Dynamic Precision ◽  
Transient Error ◽  
The Time Domain

The feed motion dynamic precision is determined by the properties of the CNC system, the servo control system and the mechanical structure. The Acceleration/Deceleration Control (ADC) in CNC system is widely used to smooth the motion trajectory, so as to reduce transient error caused by vibration. The performance of various ADC algorithms differ significantly, which indicates the importance of developing more effective ADC algorithm. In this paper a novel ADC algorithm called “Asymmetric Double S-shape type Algorithm” is introduced and validated by detailed mathematic deduction, and then its dynamic performance is compared with that of traditional ADC algorithms in both the time domain and frequency domain. The analytical and simulation results demonstrated that, the proposed novel ADC algorithm has notably advantage over the traditional ones in reducing the tracking error in both transient state and steady state, hence is capable of fundamentally improving the feed motion dynamic precision.

Simulation and Optimization Design of Gasoline Engine Exhaust Muffler

2014 ◽  
Vol 599-601 ◽  
pp. 451-454
Author(s):  
Jie Cai ◽  
Yu Hong Long ◽  
Huai Hui Du ◽  
Jun Liang Liu ◽  
Wen Shang Li
Keyword(s):  
Simulation Model ◽  
Optimization Design ◽  
Gasoline Engine ◽  
Working Process ◽  
Engine Exhaust ◽  
Simulation And Optimization ◽  
Related Data ◽  
Simulation Calculation ◽  
Exhaust Noise ◽  
Simulation Results

The coupling simulation model of a gasoline engine’s working process and muffler is established by GT-Power software, and related data are obtained by simulation calculation. It is found that the calculating results are consistent with the actual data, which validates the correctness of this simulation model. Through the analysis processing of the coupling simulation model, it is put forward an improved case for the exhaust muffler in this paper. Based on a local optimization, the simulation results show that the insertion loss of muffler has improved markedly, the exhaust noise values decreased and indicated power engine remain basically unchanged.

Transmission Modelling for Gear Rattle Analysis

1999 ◽  
Author(s):  
Yu Michael Wang ◽  
Manoj Radhakrishnan ◽  
Weijie Zhao
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Time Domain ◽  
Gear Mesh ◽  
Gear Backlash ◽  
Analysis Scheme ◽  
Shaft Flexibility ◽  
Engine Clutch ◽  
The Time Domain ◽  
Gear Rattle

Abstract This paper describes a model for torsional vibration of automotive manual transmissions. The model is developed for the purpose of analysis and prediction of gear rattles. Elements of the model include engine, clutch, gear mesh, gear backlash, and shaft flexibility. A numerical method — finite element method in the time domain (FET) — is employed for the dynamic analysis. Results are presented which show the effectiveness of the modelling and analysis scheme.

Semiactive Control of Vibrations in Automobiles

1991 ◽  
Author(s):  
Junghsen Lieh ◽  
Imtiaz Haque
Keyword(s):  
Control Mechanism ◽  
Semiactive Control ◽  
Vehicle Model ◽  
Optimal Control Strategy ◽  
Car Body ◽  
Damping Control ◽  
Control Scheme ◽  
Body Roll ◽  
Significant Attenuation ◽  
The Time Domain

Abstract A seven-DOF vehicle model comprising a full car body and four wheel-axle assemblies is used to investigate the influence of active and semiactive suspensions on ride performance. The active control of car body roll, pitch and bounce is based on an optimal control strategy assuming the tire deflection measurements are not available. The frequency analysis shows a significant attenuation in car body modes but a potential increase in wheel motions. Dissipative dampers with solenoid valves are used as the semiactive control mechanism. Simulation results in the time domain indicate that suboptimal values exist in the damping “on” state and an on-off damping control scheme can effectively reduce the car body motions and suspension travels.

Energy Saving Matching of Power Equipment for Four-Footed Robot Dog

2014 ◽  
Vol 986-987 ◽  
pp. 1222-1225
Author(s):  
Jun Wang ◽  
Chuan Hu ◽  
You Tong Zhang
Keyword(s):  
Energy Saving ◽  
Gasoline Engine ◽  
Dynamic Performance ◽  
Bench Test ◽  
Power Equipment ◽  
Pressure Feedback ◽  
Save Energy ◽  
Pump Pressure ◽  
Experimental Bench ◽  
Fast Dynamic

To increase the flexibility performance of robot dog, dynamic performance matching of power equipment in four-footed robot dog is made. Demand for power and configure in robot dog power equipment is briefly analyzed, improved backward power match between gasoline and pump is presented, power and flow rate match between gasoline and pump is calculated, control strategy based on pump pressure feedback is applied into gasoline engine control in order to save energy. With experimental bench test, experimental results showed that energy saving matching of power equipment can meet the requirement of fast dynamic meditation for robot dog .

scholarly journals Application of Correlation Analysis for Assessment of Infrasound Signals Emission by Wind Turbines

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6891
Author(s):  
Tomasz Boczar ◽  
Dariusz Zmarzły ◽  
Michał Kozioł ◽  
Daria Wotzka
Keyword(s):  
Correlation Analysis ◽  
Frequency Domain ◽  
Coherence Function ◽  
Wind Farms ◽  
Wavelet Coherence ◽  
Technical Parameters ◽  
Time Frequency ◽  
Frequency Domains ◽  
Frequency Transformations ◽  
The Time Domain

The study reported in this paper is concerned with areas related to developing methods of measuring, processing and analyzing infrasound noise caused by operation of wind farms. The paper contains the results of the correlation analysis of infrasound signals generated by a wind turbine with a rated capacity of 2 MW recorded by three independent measurement setups comprising identical components and characterized by the same technical parameters. The measurements of infrasound signals utilized a dedicated measurement system called INFRA, which was developed and built by KFB ACOUSTICS Sp. z o.o. In particular, the scope of the paper includes the results of correlation analysis in the time domain, which was carried out using the autocovariance function separately for each of the three measuring setups. Moreover, the courses of the cross-correlation function were calculated separately for each of the potential combinations of infrasound range recorded by the three measuring setups. In the second stage, a correlation analysis of the recorded infrasound signals in the frequency domain was performed, using the coherence function. In the next step, infrasound signals recorded in three setups were subjected to time-frequency transformations. In this part, the waveforms of the scalograms were determined by means of continuous wavelet transform. Wavelet coherence waveforms were calculated in order to determine the level of the correlation of the obtained dependencies in the time-frequency domain. The summary contains the results derived from using correlation analysis methods in the time, frequency and time-frequency domains.

scholarly journals Design and Optimization of a Dual-Input Coupling Powertrain System: A Case Study for Electric Tractors

2020 ◽  
Vol 10 (5) ◽  
pp. 1608
Author(s):  
Tonghui Li ◽  
Bin Xie ◽  
Zhen Li ◽  
Jiakun Li
Keyword(s):  
Dynamic Models ◽  
Optimal Parameter ◽  
Dynamic Performance ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Design Parameters ◽  
Feasible Region ◽  
Energy Management Strategy ◽  
Powertrain System ◽  
Overall Efficiency

In this study, a dual-input coupling powertrain system (DICPS) was proposed to improve the energy utilization efficiency of pure electric tractors (PETs). The working principles of the DICPS under different modes were analyzed and dynamic models were established. To study the influence of changing key parameters in the DICPS on the economic performance of PETs, a parameter-matching design method was proposed and the feasible region of the design parameters was determined according to the tractor’s dynamic performance. In addition, we put forward an energy management strategy (EMS) based on the optimal system efficiency and a dual-motor-driven electric tractor (DMET) model was built in MATLAB/Simulink. The simulation results revealed that different parameter configurations of DICPS will lead to significant changes in overall efficiency, with a maximum difference of 6.6% (under a rotary tillage cycle). We found that the optimal parameter configuration for the DMET under two typical working conditions was PDR = 0.5, k = 1.6. Compared with the single-motor powertrain system (SMPS), the DICPS with the optimal configuration of key parameters can significantly improve overall efficiency by about 9.8% (under a plowing cycle).

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