Vehicle Attitude Control Simulation Based on Soft and Hard Damping

2012 ◽  
Vol 263-266 ◽  
pp. 660-663
Author(s):  
Yu Zhuo Men ◽  
Haibo Yu ◽  
Xin Pan
Keyword(s):  
Simulation Model ◽  
Attitude Control ◽  
Control Algorithm ◽  
Shock Absorber ◽  
Model Based ◽  
Control Simulation ◽  
Damping Characteristics ◽  
Simulation Based ◽  
Simulation Results ◽  
The Impact

In order to study the impact of vehicle attitude changes on stability, vehicle attitude control simulation model based on soft and hard damping characteristics was built. The model was applied to simulate vehicle straight driving and turning driving, thus simulating various vehicle attitudes in driving. The simulation results show that this model was correct and the control algorithm was feasible; the damping impact on a variety of vehicle attitudes in the driving process can be simulated in advance by adjusting the damping; and the changes of soft and hard damping adjustable shock absorber damping can effectively change the vehicle riding comfort and handling stability.

scholarly journals Analysis of the impact of simulation model simplifications on the quality of low-energy buildings simulation results

2017 ◽  
Vol 22 ◽  
pp. 00081
Author(s):  
Marcin Klimczak ◽  
Jacek Bojarski ◽  
Piotr Ziembicki ◽  
Piotr Kęskiewicz
Keyword(s):  
Simulation Model ◽  
Low Energy ◽  
Low Energy Buildings ◽  
Simulation Results ◽  
The Impact

A COMPARISON OF SIMULTANEOUS KELLY BETTING STRATEGIES

2013 ◽  
Vol 6 (2) ◽  
pp. 1-28
Author(s):  
Andrew Grant ◽  
Peter W Buchen
Keyword(s):  
Simulation Model ◽  
Dirichlet Distribution ◽  
Relative Performance ◽  
Portfolio Optimisation ◽  
Model Based ◽  
Premier League ◽  
Simulation Results ◽  
English Premier League

In this paper we consider the problem of Kelly betting on simultaneous games, and the relative performance of betting strategies that use multibets compared to those that do not. We develop a simulation model based on the Dirichlet distribution to test the performance of three Kelly betting strategies using the empirical odds distribution from the 2007-08 English Premier League Season. This model allows us to control for the size of a bettor’s edge and the noise of this edge. The simulation results suggest that the Kelly using multibets of all levels outperforms the portfolio optimisation approach of betting on single game outcomes only. We also provide a discussion regarding the practicalities of implementing the strategies.

Study on Photovoltaic Cell and its MPPT Control Simulation

2014 ◽  
Vol 635-637 ◽  
pp. 1374-1377
Author(s):  
Jian Zhang
Keyword(s):  
Simulation Model ◽  
Output Power ◽  
Control Method ◽  
Photovoltaic Cell ◽  
Experimental Results ◽  
Matlab Simulation ◽  
Battery Charging ◽  
Experimental Platform ◽  
Control Simulation ◽  
Simulation Results

Select to herein as interference observation MPPT control method according to the principle of interference with observation of the Matlab simulation model, the simulation results by the MPPT algorithm is not added with the results were compared and found MPPT algorithm can improve the the output power of the photovoltaic cell. Through experimental platform to build, complete with MPPT way battery charging, and the experimental results and the data used to prove the correctness of the algorithm.

scholarly journals Simulation and Prediction of the Groundwater Pollution Caused by the Leakage from a Sewage Plant in an Aluminum Factory Under the Action of Ocean Tide Support

2021 ◽  
Author(s):  
Yu Zhang ◽  
Junkang Lan
Keyword(s):  
Groundwater Pollution ◽  
Permeability Coefficient ◽  
Ocean Tide ◽  
Pollution Transport ◽  
Groundwater Environment ◽  
Groundwater Aquifer ◽  
Simulation Based ◽  
Simulation Results ◽  
Groundwater Flow Field ◽  
The Impact

In order to predict the impact of wastewater from an aluminum plant treatment station on the groundwater environment under abnormal conditions (i.e., sewage leakage accident). Through the investigation of hydrogeological conditions, and then the permeability coefficient of the aquifer was measured through borehole injection tests. Finally, the groundwater pollution transport halo was obtained by numerical simulation based GMS software. The simulation results showed that the groundwater aquifer will be seriously polluted by COD and fluoride (F-) after the sudden sewage seepage accident. What’s more, the simulation results showed that the pollution concentration is getting higher and higher with time, which is analyzed to be caused by the small permeability of the water-bearing medium in the aquifer and the groundwater flow field was supported by seawater tide.

scholarly journals A High-Efficiency Energy Harvesting By Using Hydraulic Electromagnetic Regenerative Shock Absorber

2020 ◽  
Author(s):  
Muhammad Yousaf Iqbal ◽  
Zhifei Wu ◽  
Khalid Mahmood
Keyword(s):  
Mathematical Model ◽  
Energy Harvesting ◽  
Shock Absorber ◽  
Mechanical Energy ◽  
Excitation Frequency ◽  
National Standard ◽  
Damping Force ◽  
Damping Characteristics ◽  
Simulation Results ◽  
Regenerative Shock Absorber

Abstract This article intends a hybrid energy harvesting shock absorber design which comprehends energy harvesting of automobile suspension vibration dissipation. A mathematical model of the energy harvesting prototype is established, and simulation results show that the dissipation energy can be recovered by varying the feed module, thereby got the damping forces ratio at different compression and extension stroke. The energy conversion from hydraulic energy to mechanical energy mainly then mechanical energy converted into electrical energy furthermore we can rechange our battery from this recovered energy. The advanced mathematical model and prototype proposed maximum ride comfort meanwhile recovered the suspension energy and fuel saving. This article shows the simulation results verifying it with prototype test results. The damping force of expansion stroke is higher than the damping force of compression stroke. The damping characteristics curves and speed characteristics curves verify the validity by simulation and prototyping damper at different amplitudes of off-road vehicles. The Hydraulic Electromagnetic Regenerative Shock Absorber (HESA) prototype characteristic is tested in which 65 watts recovered energy at 1.67 Hz excitation frequency. So, 14.65% maximum energy recovery efficiency got at 20 mm rod diameter and 8 cc/rev motor displacement. The damping characteristics of the HESA prototype examined and it has ideal performance as the standard requirements of the National Standard QC/T 491–1999.

Analysis of Dynamic Characteristics of Automatic Transmission Shifting Control

2014 ◽  
Vol 643 ◽  
pp. 42-47 ◽  
Author(s):  
Yan Xiao Fu ◽  
Liang Yi Cui ◽  
Xiang Yang Xu ◽  
Peng Dong
Keyword(s):  
Simulation Model ◽  
Control Strategy ◽  
Model Simulation ◽  
Automatic Transmission ◽  
Test Results ◽  
Shift Quality ◽  
Impact Function ◽  
Automatic Transmissions ◽  
Simulation Results ◽  
The Impact

Basing on the fact that requirements for shift quality in automatic transmissions have been increasing rapidly necessitates the establishment of a suitable shifting control strategy in order to facilitate smoothness of different processes, this paper introduces a simulation model of an 8-speed automatic transmission for front-drive vehicles with respect to detailed shifting strategies and relative parameters. The transmitted torque of the oncoming shift elements before synchronization point can be reduced by an impact function in order to damp the impact and thus make the gear shifting process more smooth. This paper makes a systematic introduction of the structure of 8AT, theoretical basis of control strategy, the establishment of the simulation model and the comparison between test results and simulation results. The conclusion shows that with an accurate dynamic model, simulation results and test results are neighborhood data, the simulation model can be used to help realizing the ultimate goal of better shift quality with higher efficiency, lower shift loads and improved shifting comfort.

Excavator Operator Mechanism and Hydraulic Integration Model Construction and Simulation Based on Modelica

2011 ◽  
Vol 130-134 ◽  
pp. 666-671 ◽  
Author(s):  
You Ping Gong ◽  
Xiang Juan Bian ◽  
Guo Jin Chen
Keyword(s):  
Simulation Model ◽  
Operating Mode ◽  
Working Process ◽  
Integration Model ◽  
Hydraulic Simulation ◽  
Simulation Based ◽  
History Of ◽  
Simulation Results ◽  
Paper Construct ◽  
Efficiency And Reliability

This paper explains and demonstrates how to construct integration simulation model of exavtor operator based on modelica language. The paper firstly introduce the history of modelic language and application in production design; secondly the paper construct exavtor operator dynamics model by D-H method and construct operator’s modelica model by dymola soft; then the paper analyse the hydraulic system of operator, and construct hydraulic simulation model which integrate to operator mechanism system; at last the paper gives simulation results of vauious operating mode. Because of consideration in coordination of mechanism and hydraulic of operator,the simulation results approach actual working process,and improve the exavtor’s design efficiency and reliability.

Investigation of Control Algorithms for Semi-Active Suspension Systems Based on a Full Vehicle Model

2011 ◽  
Author(s):  
M. A. Ajaj ◽  
A. M. Sharaf ◽  
S. A. Hegazy ◽  
Y. H. Hossamel-deen
Keyword(s):  
Control Algorithm ◽  
Shock Absorber ◽  
Ride Comfort ◽  
Active Suspension ◽  
Control Algorithms ◽  
Suspension Systems ◽  
Full Vehicle ◽  
Damping Characteristics ◽  
Active Suspension Systems ◽  
Suspension Control

This paper presents a comprehensive investigation of automotive semi-active suspension control algorithms and compares their characteristics in terms of ride comfort and tire-road holding ability. Particular attention has been paid to the semi-active suspension systems fitted with a shock absorber of dual damping characteristics. Different mathematical models are presented to investigate the ride response considering both simplified and complex vehicle models. Numerical simulation has been carried out through the MATLAB/SIMULINK environment which aids the future development of controllable suspension systems to improve vehicle ride comfort. The results show a considerable improvement of the vehicle ride response using different schemes of semi-active suspension system in particular the modified groundhook control algorithm.

Dual Clutch Automatic Transmission Two Clutch Starting Control and Simulation

2013 ◽  
Vol 372 ◽  
pp. 538-542
Author(s):  
Guo Zhong Jia ◽  
Xin Ping Wu ◽  
Zhen Hua Jia
Keyword(s):  
Simulation Model ◽  
Control Strategy ◽  
Control Strategies ◽  
Automatic Transmission ◽  
Control Model ◽  
Launch Strategy ◽  
Simulation Results ◽  
Clutch Control ◽  
The Impact ◽  
Starting Control

According to the special structure of DCT, the control strategy of launch with two clutches has been proposed to share the friction work and extend the life of both clutches. The dynamic model of launch with two clutches and the clutch control model have been built. the control strategies of both clutches have been proposed respectively according to the requirement of the different driver intention and the limitation of the impact of vehicle. The simulation model of launch with two clutches has been built using the Matlab/Simulink platform, and the simulation has been carried out. The Simulation results show that the balance of friction work based on this launch strategy with two clutches has been validated.

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