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With the increased number of electric/electronic devices introduced into vehicles, the coordination control work among various appliances is becoming more and more complicated. Consequently, the fault diagnosis of vehicular devices is also becoming more difficult. This paper proposes a fault diagnosis method based on electronic coordination mechanism. The basic design and implementation procedure...
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...
Present a high-speed vehicle-mounted measurement method of the road shape. The measurement system's hardware is composed of two accelerometers, a laser displacement sensor, a data acquisition device and a vehicular computer. The software algorithm in MATLAB uses the longitudinal acceleration signal which are detected by the accelerometers as the main input signal to obtain longitudinal displacement...
In vehicle navigation system, POI(points of interest) retrieval is important. Since the restriction of the embedded system, the retrieval should deal with enormous POI data in limited external memory and internal memory, when the retrieval speed should fit for the vehicle navigation. The rapid retrieval method is designed for solving the problem. The method is based on Chinese Pinyin. It includes...
To locate the moving sound sources with microphone arrays, with the random sparse arrays we could get equal results but much less microphones than the complete arrays; then the measuring system could be inexpensive and less complicated. The traditional technique to identify sound source with random sparse array is usually based on the beamforming principle, its resolution at low frequencies is not...
A new kind of automotive electrical system is proposed, which named IEED system. It is a completely distributed system with only intelligent electrical & electronic device (IEED) in it. The systempsila features is described and key IEEDs in system are also presented. The system prototype was developed and experimented. Results showed that IEED system is feasible and cost effective.
Regenerative braking plays an important role in improving the efficiency of electric vehicles. But excessive regenerative torque may affect the anti-lock brake control. The paper presents a novel brake control strategy for electric vehicles which integrates the regenerative brake control and anti-lock brake control. The strategy is designed based on a novel idea called "slip trial method",...
Model of intersection, as a part of road network model, which is the basis of In-Vehicle Navigation System, provides an abstract description of urban traffic intersection. This paper proposes a Multi-branch model, which abstracts branch based on physical structure of intersection for describing structural features of different types of intersections. And on this basis it describes accurate navigation...
This article presents a general structure of speech control intelligent electrical system. Under specific in-vehicle environment, a classified vocabulary is designed. Driver's nature language is processed using normal-mode and infinite state machine theory to achieve the goal of speech control. Robust design is also used to increase the accuracy of driver' intension recognition result. A demo system...
The hybrid electric vehicle (HEV) discussed in this paper features its post-transmission configuration, which enables the tractive motor to drive the vehicle even in neutral gear. A generator is attached to the engine to charge the battery. Development of control system of the powertrain is reported in this paper. Control strategies based on ICE optimal operating schedule are utilized to reduce fuel...
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