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Automobile Steering by Wire (SBW) system is an advanced steering system, which cuts off the mechanical connection between steering wheel and steered wheels. It controls the steering motor to steer front wheels actively so as to improve handling and stabilities and active safety, and controls steering wheel motor to supply the driver with ideal road feel. Driver-vehicle-road closed loop models of SBW...
In order to measure vehicle's noise and the engine speed, a novel instrument is developed based on digital signal processor DSP-TMS320VC33 and monolithic processor AT89C51. The DSP is mainly used to process the data and the monolithic processor is used for human-machine interface and management. The new idea applies non-contact measurement of vehicle noise by the microphone to extract the vehicle...
An online fan fault diagnosis system is proposed based on wavelet and neural network, and the system is implemented on the LabVIEW platform. Relying on the noise signal from the fan, the recognition system utilizes power spectrum gravity center, sound level, wavelet frequency segment power of the signal as feature vectors, and the BP network as classifier for fault diagnosis. The experimental results...
This paper introduces a new bearing fault detection and diagnosis scheme based on relevance vector machine (RVM) of vibration signals, i.e. two relevance vector machines are viewed as observer and classifier respectively. The observer is applied to identify and estimate various faults of bearing to gain fault state residual sequence while the classifier is used to classify multiple fault modes of...
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