Model Construction and Simulation Analysis of Vehicle Collision on Steep Road Section in Mountainous Area

2021 ◽  
pp. 333-348
Author(s):  
Xuezhao Fang ◽  
Bing Wang ◽  
Haoran Liu ◽  
Kuo Zhao
Keyword(s):  
Simulation Analysis ◽  
Model Construction ◽  
Mountainous Area ◽  
Road Section ◽  
Vehicle Collision

Simulation Analysis of a PSO-Based Vehicle Collision Avoidance Method under Cooperative Vehicle Infrastructure Environment

2012 ◽  
Vol 241-244 ◽  
pp. 1539-1544
Author(s):  
Jiang Liu ◽  
Bai Gen Cai ◽  
Yun Peng Wang ◽  
Jian Wang
Keyword(s):  
Collision Avoidance ◽  
Simulation Analysis ◽  
Sufficient Information ◽  
Vehicle Collisions ◽  
Safety Assurance ◽  
Unsignalized Intersections ◽  
Vehicle Collision ◽  
Information Interaction ◽  
Braking Control ◽  
And Performance

Vehicle safety is of great importance to improve the capability and performance of the transportation system. To deal with safety threats most probably caused by the vehicle collisions in unsignalized intersections, concept of vehicle infrastructure cooperation provides a perspective and challenging solution to enable sufficient information interaction by V2V and V2I communication, which make it feasible to avoid collisions more autonomously. In vehicle collision avoidance scheme, decision making of vehicle braking control is crucial for emergent situations when safety alerts are not reacted by the driver. In this paper, a novel cooperative vehicle collision avoidance method based on particle swarm optimization is proposed, with an integrated fitness updating criteria considering both safety interval and relative continuity of vehicle deceleration. With a simulation analysis approach, the proposed collision avoiding solution is validated in a real road oriented scenario, and the results demonstrate its effectiveness and advantages to reduce collision and achieve safety assurance under cooperative vehicle infrastructure environment.

Simulation Analysis of Walking and Climbing Robot Based on ADAMS

2013 ◽  
Vol 721 ◽  
pp. 433-436
Author(s):  
Dong Mei Liu ◽  
Hang Xu Yang
Keyword(s):  
Simulation Analysis ◽  
Robot Motion ◽  
Mechanical Equipment ◽  
Mountainous Area ◽  
Climbing Robot ◽  
Complex Environment ◽  
Motion Process ◽  
New Type ◽  
Simulation Results ◽  
Working Efficiency

At present, it is mostly the wheel or caterpillar of large mechanical equipment to finish the transportation operation in the mountainous area and forest complex environment. These large machines have some shortcomings, such as power consumption, poor mobility, low working efficiency and their own shortcoming of balance and the barrier and grade ability. In order to solve the above problems, this paper designed a new type of walking climbing robot and built virtual prototype of the robot by using PRO/E, did simulation of the robot motion process and the simulation results verified the feasibility of the design.

Modelling the tyre forces for a simulation analysis of a vehicle accident reconstruction

2016 ◽  
Vol 231 (1) ◽  
pp. 16-26 ◽  
Author(s):  
Inhwan Han
Keyword(s):  
Vehicle Dynamics ◽  
Dynamic Behaviour ◽  
Simulation Analysis ◽  
Physical Parameters ◽  
Force Model ◽  
Accident Reconstruction ◽  
Test Results ◽  
Vehicle Accident ◽  
Vehicle Collision ◽  
Core Part

This paper proposes a modified bilinear tyre force model for simulations of the vehicle dynamics, which is the core part in reconstruction analysis of vehicle collision accidents. The physical parameters involved were estimated using a statistical method based on experimental test results of the tyre forces. With an appropriate setting of the input data related to a tyre blowout, a simulation analysis of the dynamics of the vehicle which had suffered the tyre blowout was performed. The developed simulation analysis results for the dynamic behaviour of a vehicle with normal tyres with total locks or with a one-wheel lock and for vehicles with tyre blowouts when driving straight or turning corresponded well to the results of other commercial programs. The reliability of these results was proved by comparing them with the corresponding data for many vehicles involved in blowout-related accidents and in particular the path travelled by those vehicles as recorded on black-box footages.

The Influence of Forming on Collision Performance of TRIP780 and HSLA340 Steel Parts

2011 ◽  
Vol 337 ◽  
pp. 171-177 ◽  
Author(s):  
Ren Dong Liu ◽  
Guo Ming Zhu ◽  
Chao Lu ◽  
Fu Wang ◽  
Li Lin ◽  
...  
Keyword(s):  
Simulation Analysis ◽  
Operating Conditions ◽  
Thickness Variation ◽  
Beam Forming ◽  
Stress And Strain ◽  
Analysis Model ◽  
Structural Part ◽  
Vehicle Collision ◽  
Cold Rolled ◽  
Collision Processes

Based on cold rolled TRIP 780 and HSLA 340 steel sheet, the stamping of U-beam and its springback was studied experimentally and numerically. Collision analysis model of closed hat section beam was established on the basis of simulation analysis of U-beam stamping and springback. Mapping was used to transfer results of thickness, stress and strain from U-beam forming part to impact structural part. Collision processes of closed hat section were analyzed under various operating conditions considering the influence of forming. The results show that thickness variation, residual stress, and work hardening of the material after forming affect collision processes directly. The current paper provides reference for improving precision of simulation for vehicle collision.

Case Exercise: Biomechanics in Rearend Motor Vehicle Collisions

2007 ◽  
Vol 12 (3) ◽  
pp. 4-7
Author(s):  
Charles N. Brooks ◽  
Christopher R. Brigham
Keyword(s):  
Motor Vehicle ◽  
Body Position ◽  
Motor Vehicle Collisions ◽  
Time Curve ◽  
Vehicle Collisions ◽  
Need For Treatment ◽  
Multiple Factors ◽  
Bodily Injury ◽  
Vehicle Collision ◽  
Physical Findings

Abstract Multiple factors determine the likelihood, type, and severity of bodily injury following a motor vehicle collision and, in turn, influence the need for treatment, extent of disability, and likelihood of permanent impairment. Among the most important factors is the change in velocity due to an impact (Δv). Other factors include the individual's strength and elasticity, body position at the time of impact, awareness of the impending impact (ie, opportunity to brace, guard, or contract muscles before an impact), and effects of braking. Because Δv is the area under the acceleration vs time curve, it combines force and duration and is a useful way to quantify impact severity. The article includes a table showing the results of a literature review that concluded, “the consensus of human subject research conducted to date is that a single exposure to a rear-end impact with a Δv of 5 mph or less is unlikely to result in injury” in most healthy, restrained occupants. Because velocity incorporates direction as well as speed, a vehicular occupant is less likely to be injured in a rear impact than when struck from the side. Evaluators must consider multiple factors, including the occupant's pre-existing physical and psychosocial status, the mechanism and magnitude of the collision, and a variety of biomechanical variables. Recommendations based solely on patient history and physical findings (and, perhaps, imaging studies) may be ill-informed.

Optimizing Overall equipment effectiveness through simulation analysis

2012 ◽  
Author(s):  
Anand S. Relkar ◽  
K. N. Nandurkar
Keyword(s):  
Simulation Analysis

Computer simulation study about the dependence of amorphous silicon photonic waveguides efficiency on the material quality

2020 ◽  
Vol 90 (3) ◽  
pp. 30502
Author(s):  
Alessandro Fantoni ◽  
João Costa ◽  
Paulo Lourenço ◽  
Manuela Vieira
Keyword(s):  
Amorphous Silicon ◽  
High Throughput Screening ◽  
Simulation Analysis ◽  
Low Cost ◽  
Deposition Process ◽  
Large Area ◽  
Sidewall Roughness ◽  
Sensing Applications ◽  
Fabrication Defects ◽  
The Impact

Amorphous silicon PECVD photonic integrated devices are promising candidates for low cost sensing applications. This manuscript reports a simulation analysis about the impact on the overall efficiency caused by the lithography imperfections in the deposition process. The tolerance to the fabrication defects of a photonic sensor based on surface plasmonic resonance is analysed. The simulations are performed with FDTD and BPM algorithms. The device is a plasmonic interferometer composed by an a-Si:H waveguide covered by a thin gold layer. The sensing analysis is performed by equally splitting the input light into two arms, allowing the sensor to be calibrated by its reference arm. Two different 1 × 2 power splitter configurations are presented: a directional coupler and a multimode interference splitter. The waveguide sidewall roughness is considered as the major negative effect caused by deposition imperfections. The simulation results show that plasmonic effects can be excited in the interferometric waveguide structure, allowing a sensing device with enough sensitivity to support the functioning of a bio sensor for high throughput screening. In addition, the good tolerance to the waveguide wall roughness, points out the PECVD deposition technique as reliable method for the overall sensor system to be produced in a low-cost system. The large area deposition of photonics structures, allowed by the PECVD method, can be explored to design a multiplexed system for analysis of multiple biomarkers to further increase the tolerance to fabrication defects.

Digital Simulation Analysis of PA10

ICTE 2013 ◽  
2013 ◽  
Author(s):  
Zhongnan He ◽  
Wenbiao Wu
Keyword(s):  
Simulation Analysis ◽  
Digital Simulation
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