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Electrorheological fluid(ERF) is a new type of "smart" fluid. In this paper, a new type ERF shock absorber was designed by putting ERF in damper as a damp medium and a fuzzy control arithmetic for this ERF shock absorber was designed. This arithmetic's validity is made sure by simulation.
This article built the simulation model between the catenary voltage and the traction motor based on the CRH2 high-speed EMUs, and aimed to analysis the impact on the operating speed of EMUs which is caused by the decreased catenary voltage.
An image detection system based on DSP is designed for the length of vehicle queue at crossroad. The whole hardware structure of the system is described firstly, and the circuitry to process image by DSP is detailed. Also, the main program of the image detection system and the multi-threshold extraction method for the vehicle queue length are presented in the paper. By applying the system to the urban...
Design philosophy of dual-clutch automatic transmission (DCT) shift law was defined; utilizing theoretical calculation of vehicle fuel-consuming model and vehicle dynamic model and the weighting method, combining parameter of the vehicle and engine drive model shift law of dual-clutch automatic transmission was defined. Under CAT-7300-D-P environmental chamber, using RPL1229/12C dynamometer machine...
The longitudinal profile of a road causes vehicle vibration and thus an important parameter in research on the ride comfort and durability of vehicles. However, large-scale measured profiles of actual roads remain unavailable owing to technical measurement difficulties. We report a vehicle-mounted system for measuring short-to medium-wave road profiles in a broad frequency range. In this system, the...
Despite the development of the GPS navigation system, problems still lies in two topics: GPS signal losses and unreliable positioning in the elevation direction. This paper proposes a vehicle state estimation system to produce integrate information including the slope angle, as well as continuous positioning in case GPS losses happen. The system uses low-cost inertial sensors, including an accelerometer...
In this paper, we have derived the linear model of a six-rotor aerial vehicle and proposed a controller for hovering. Attitudes of the six-rotor vehicle are affected by various sources of disturbances such as wind, measurement noise and modeling uncertainty. For these reasons, we proposed a controller based on disturbance observer, which estimates and compensates disturbances. It is shown by simulation...
Short stator single-side linear induction motors (SLIM) which are applied in the propulsion of transit vehicles are widely used in recent years. The SLIM is capable of adhesion independent braking and acceleration levels which ensures safe, fast running. This paper presents a novel slip frequency control scheme with feed-forward compensation for SLIM. Experimental results for the control scheme from...
The truck exhaust emissions and processing technology is analysed. Developed system is based on SCR technology, controlling metering pump by Stepper Motor to get precise delivery of the selective catalytic reducer such as urea. TMS320F28016 DSP is adopted as core control unit and SLA7062 is adopted as the stepper motor driver chip. As the SAE J1939 protocol does not define node parameters of exhaust...
The License plate location is an important stage in Intelligent Transportation System (ITS). It is considered to be the most crucial step of an Automatic License Plate Recognition (ALPR) system. A new image segmentation method based on integrated features and Marker-Controlled Watershed algorithm was proposed to locate and split the plate region of vehicle images from complicated environment. Firstly,...
This paper will use the WITNESS simulation software to conduct systematic research on the production logistics of coal enterprises, which is able to save the costs and time at utmost. Through the dynamic running of the system, we could make out the bottlenecks in production logistics very quickly and make sure the balance of each node. Through the WITNESS optimization module, we could optimize the...
Relative coordination has predominant advantage in uncertain environment path planning problem because it denies much of redundant information of the dynamic environment while avoids the rotation transformation which is a big burden in the traditional methods. Based on relative coordination, this paper proposes a trimmed Ant Colony Optimization (ACO) algorithm for three dimensional trajectory generation,...
To improve the robustness of Dual-steering Control, which is effective to enhance mobility of 4WD EV, MPC controller is proposed. The reference model, calculating the control reference value, adopts 3dof vehicle reference model. The predictive model of MPC controller applies the improved 2dof vehicle model, and objective function is proposed based on yaw rate and power consumption. A feedback correction...
Based on the Agent technology's simulation autonomy entity characteristics, this paper has studied the structure of traffic system Agent model and Vehicle Agent's driving control strategy, such as Freedom driving, Following driving, Overtaking driving and so on, and use Borland's Delphi to develop Agent-based Intelligent Traffic Simulation Prototype System -AITSPS under Windows 2000/xp environment,...
When ADAMS carries on the kinematics dynamic simulation analysis, the entity modelling, the increase restraint, the infliction driving influence, the movement simulation and so on, several steps should be carried on. If achieve a number of different actions step by step during simulation, sometimes need to select the appropriate function. This paper puts forward the research of using Max, min function...
Based on ultrasonic principle, the car rain protection airproof performance test method was proposed after the main problems of the current artificial rain test were put forward. In the new method, the detection and evaluation was separated which means that the real-time detection, in the use of ultrasonic, could be achieved as the car enter the venue and according to the on-site analysis of the collected...
This paper presents a remote vehicle diagnosis system that not only be used in vehicle diagnosis and maintenance, but also performs well in the vehicle development and enterprise management. As diversities of physical layer and data link layer protocols are widely used in the automotive electrical systems, a general protocol electrical level transfer circuit is designed and solidified software for...
This paper has proposed robust quasi-sliding mode control for four wheel steering (4WS) vehicle based on vehicle side slip angle tracking with consideration of the variation of the center of vehicle gravity and disturbance of lateral wind, which are both in bounded ranges. By replacing ideal switching function with saturation function and setting a proper thickness of boundary layer, the controller...
The purpose of this paper is to propose a new control method in active front steering for vehicle stability using Mu control theory. The vehicles always undertake different loadings and variation road friction coefficient including external disturbances and the design of vehicle control system has model errors in fact, the primary design techniques for active front wheel steering vehicle controller...
In urban conditions, vehicles fuel consumes greatly in the idle condition, and vehicles start and stop frequently. The control of engine rapid start and stop is completed using ISG, and the abolition of engine idling condition. In order to improve fuel economy and start-up performance, the structure of city bus powertrain was made better through analyzing start and brake, and the parameters matching...
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