scholarly journals Study on Vehicle Track Model in Road Curved Section Based on Vehicle Dynamic Characteristics

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
Ren Yuan-Yuan ◽  
Zhao Hong-Wei ◽  
Li Xian-Sheng ◽  
Zheng Xue-Lian
Keyword(s):  
Data Analysis ◽  
Dynamic Characteristics ◽  
Vehicle Dynamic ◽  
Yaw Rate ◽  
Trajectory Models ◽  
Normal Trajectory ◽  
Characteristic Features ◽  
Curved Section ◽  
Driving Stability ◽  
Curve Geometry

Plenty of experiments and data analysis of vehicle track type in road curved section show that the deviation and the crossing characteristics of vehicle track paths are directly related to the driving stability and security. In this connection, the concept of driving trajectory in curved section was proposed, six track types were classified and defined, and furthermore their characteristic features were determined. Most importantly, considering curve geometry and vehicle dynamic characteristics, each trajectory model was established, respectively, and the optimum driving trajectory models were finally determined based on the crucial factors of vehicle yaw rate, which was also the most important factor that impacts vehicle’s handling stability. Through it all, MATLAB was used to simulate and verify the correctness of models. Finally, this paper comes to the conclusion that normal trajectory and cutting trajectory are the optimum driving trajectories.

Safe Test System for the Turning Vehicles ESP Control Performances on the Lateral Restricted Vehicle System

2013 ◽  
Vol 694-697 ◽  
pp. 1334-1339
Author(s):  
Jian Zhu Zhao ◽  
Lu Zhang ◽  
Guo Ye Wang ◽  
Yan Chen ◽  
Zhong Fu Zhang
Keyword(s):  
Control Strategy ◽  
Test System ◽  
Stability Control ◽  
Control Test ◽  
Vehicle Dynamic ◽  
Vehicle System ◽  
Test Conditions ◽  
Vehicle Dynamic Simulation ◽  
Driving Stability ◽  
Great Uniformity

Project the lateral restricted vehicle system to establish a safe and efficient vehicle driving stability control test system. Aimed at Chery A3 car, based on Matlab/Simulink, establish the lateral restricted vehicle dynamic simulation system. Used the braking and driving integrated ESP control strategy, separately analyze the ESP control performances of the independent vehicle system and the lateral restricted vehicle system on three test conditions including neutral steering, under steering, over steering. The research results indicate that the ESP control performances of the lateral restricted vehicle system and the independent vehicle system have great uniformity on the three test conditions, provide a basis for the vehicle driving stability control test research.

scholarly journals Using multivalued logic for qualitative data analysis

2021 ◽  
Vol 2131 (3) ◽  
pp. 032046
Author(s):  
L A Lyutikova
Keyword(s):  
Data Analysis ◽  
Probabilistic Models ◽  
Classification Problem ◽  
Subject Area ◽  
Multivalued Logic ◽  
Formal Representation ◽  
Logical Function ◽  
Heterogeneous Information ◽  
Characteristic Features ◽  
The Relationship

Abstract The paper considers a logical approach to data analysis to solve the classification problem. The studied data is a set of objects and their features. As a rule, this is scattered heterogeneous information and it is not enough for a reasonable application of probabilistic models. Therefore, logical algorithms are considered, which under certain conditions may be more adequate. For an expressive formal representation of the relationship between objects and their attributes, multivalued logic is used, and the number of values depends on a specific attribute. Therefore, a system of operations is proposed for variables with different domains of definition. As a result, a decisive function is built, which is a classifier of objects that are present in the studied data. The properties and capabilities of this function are analyzed. It is shown that the logical function, which is a conjunction in the space of rules connecting given objects with their characteristic features, uniquely characterizes the initial data, divides the subject area into classes, possesses modifiability properties, meets the requirements of completeness and consistency in a given area. The paper also proposes an algorithm for its implementation.

Cemetery Organization, Brood Sorting, Data Analysis, and Graph Partitioning

1999 ◽  
Author(s):  
Eric Bonabeau ◽  
Marco Dorigo ◽  
Guy Theraulaz
Keyword(s):  
Data Analysis ◽  
Graph Partitioning ◽  
Dimensional Space ◽  
Local Information ◽  
Lasius Niger ◽  
Sorting Algorithm ◽  
Sorting Data ◽  
Pheidole Pallidula ◽  
Characteristic Features ◽  
Low Dimensional

In the previous two chapters, foraging and division of labor were shown to be useful metaphors to design optimization and resource allocation algrithms. In this chapter, we will see that the clustering and sorting behavior of ants has stimulated researchers to design new algorithms for data analysis and graph partitioning. Several species of ants cluster corpses to form a “cemetery,” or sort their larvae into several piles. This behavior is still not fully understood, but a simple model, in which agents move randomly in space and pick up and deposit items on the basis of local information, may account for some of the characteristic features of clustering and sorting in ants. The model can also be applied to data analysis and graph partitioning: objects with different attributes or the nodes of a graph can be considered items to be sorted. Objects placed next to each other by the sorting algorithm have similar attributes, and nodes placed next each other by the sorting algorithm are tightly connected in the graph. The sorting algorithm takes place in a two-dimensional space, thereby offering a low-dimensional representation of the objects or of the graph. Distributed clustering, and more recently sorting, by a swarm of robots have served as benchmarks for swarm-based robotics. In all cases, the robots exhibit extremely simple behavior, act on the basis of purely local information, and communicate indirectly except for collision avoidance. In several species of ants, workers have been reported to form piles of corpses— literally cemeteries—to clean up their nests. Chretien [72] has performed experiments with the ant Lasius niger to study the organization of cemeteries. Other experiments on the ant Pheidole pallidula are also reported in Deneubourg et al. [88], and many species actually organize a cemetery. Figure 4.1 shows the dynamics of cemetery organization in another ant, Messor sancta. If corpses, or, more precisely, sufficiently large parts of corposes are randomly distributed in space at the beginning of the experiment, the workers form cemetery clusters within a few hours.

Study on the Straight-Line Running Stability of Off-Road Vehicle with In-Wheel Motors

2013 ◽  
Vol 816-817 ◽  
pp. 454-458
Author(s):  
Wen Li Xu ◽  
Sen Wu ◽  
Shao Peng Tian ◽  
Zhi Yu Lan
Keyword(s):  
Pid Control ◽  
Control Algorithm ◽  
Control Method ◽  
Great Influence ◽  
Vehicle Dynamic ◽  
Road Vehicles ◽  
Yaw Rate ◽  
Straight Line ◽  
Dynamic Errors ◽  
Vehicle Dynamic Model

Due to the poor driving conditions, In-wheel motors of off-road vehicles may have obvious steady-state errors or dynamic errors. The straight-line running of the vehicle would have a great influence. In order to solve this problem, this paper proposes a novel control algorithm. First, the types of vehicle motor errors are analyzed. Then the influence on the motor errors is studied. Using PID control method, based on the vehicle yaw rate, the torque outputs of front motors are controlled coordinately.18 DOF vehicle dynamic model is built by Simulink. The simulation results show that this proposed control strategy can improve the vehicle running deviation.

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