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An effective lane boundaries projective model (LBPM) and improved detection method in the images captured with a vehicle-mounted monocular camera in complex environments, especially for sharp circular curve lane, is proposed in this paper. Firstly, a lane boundaries projective model is deduced. This lane model can not only express straight-line lane boundaries, but also describe the actual sharp circular...
The performances of the handling and stability and ride comfort have important influences on the bus design. To analysize them, the whole vehicle flexible model and road model are built by ADAMS software, and the performances of the original bus are simulated, the real vehicle tests are done to verify the simulation results. Acorrding to the universality design requirements of a bus enterprise, the...
Idle stop-start system is a new energy-saving product, which can obtain a good fuel economy and reduce emissions for the city bus. The work principle and mechanical structure are analyzed in this paper. The key technologies of idle-stop-start system are analyzed based on this. Then the idle-stop-start system is modeled and analysised based on AVL Cruise. Last, the fuel economy is simulated and analysised...
Presented the shift points determining method of the power shift schedule when the traction power curve does not intersect under the adjacent shift of the same throttle. Established the transmission system mathematics model. Built a software in-the-loop simulation platform with Matlab/Simulink, and simulate the process of the vehicle continuous upshift. The simulation results showed that the power...
In order to design the vehicle body structure a method on three-dimensional laser scanning was raised. In this paper three-dimensional scanning point cloud data were obtained on a certain vehicle body panels by using the three-dimensional laser scanner. Then the point cloud data processing was completed detailed including three different stages of point processing, polygon processing and the shape...
According to economic analysis, the city road have exist its own supply and demand, the papers put forward the ways of relaxation of traffic jam. If want to relax the city traffic jam, we can interweave the measures as follows: lead the demand of citizen in peak load periods, developing the public traffic and appropriate city layout so that increase the supply of road.
A robust and effective method to detect lane in the images captured with a vehicle-mounted monocular camera in challenging environments is proposed in this paper. In the newly proposed approach, the gradient direction (GD) feature and the lane boundaries projection model are used. Using GD feature and GD Gaussian distribution with the likelihood function, the lane detection is performed by employing...
The performances and parameters matches of the disc brakes directly impact on the vehicle safety. Firstly, using the traditional design theory design a disc brake, especially the eight main parameters were calculated, such as brake diameter, the disc thickness, brake torque and synchronous attachment coefficient etc. Then the brake 3D model was built in the Pro/E software, and using the Ansys software...
It is very important for a battery electric vehicle to improve energy utilization efficiency because of limited energy storage on board. According to different viewpoint and requirements for battery electric vehicles, four kinds of evaluation methods were established, respectively. Analysis and comparison between different evaluation methods were performed with the help of simulation and bus demonstration...
To vehicle development problem, setting development targets is mainly based on the benchmark test data of competitors. Usually, the target setting is subjective and ambiguous. To reform the method, fuzzy decision-making matrices were established based on Analytic Hierarchy Process (AHP), hence, the comfort targets were set quantitatively. Then, the improved radar chart was used to make comprehensive...
Modeling, simulation analysis of vertical and lateral dynamics of an electric vehicle driven by two rear hub-motors are presented. An eleven-DOF model of the electric vehicle and the road surface input model are all established. A PID controller is used to adjust yaw rate to the desired one when slip ratio of the driving wheels is less than peak slip ratio. Simulation is performed considering inputs...
Most literatures of Inventory-Routing problems find the solutions by simulation, but few solve the real case problem of logistics companies. This research will apply some specific real logistics company's operating data to study the Inventory-Routing problem. This study first develops a mathematical model for this Inventory-Routing problem, next applies Savings method, 2-opt heuristic method and 1-1...
An electric vehicle driven by two rear motors uses a new drivetrain configuration, which can not only eliminate the traditional drivetrain components, but also improve handling characteristics. A five-degree-of-freedom model of an electric vehicle is established, in which lateral motion, yaw motion, roll motion and rotary motion of two driving wheels are all considered, besides, slip ratio of wheels...
To solve moving parameters identification problem for deep sea-bed mining robot, estimation model of key parameters is built after the discussion on robot dynamic model and hydraulic system. And a controller based on key parameters estimation model is presented to accomplish the path following task for deep sea-bed mining robot with assumption that the desired path is given. Experiment results on...
Vehicle safety traffic is a hot issue today. Because the factors of pre-warning decision are very complex, including weather, time, vehicle type, self-speed, relative speed and so on, those factors usually induces pre-warning decision of vehicle safety traffic not to meet real-time capability and high accuracy. Different weather, different vehicle types and different speeds require different pre-warning...
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