New Detection Method for Vehicle Dominant Vibration Mode based on Energy Distribution

The Hong Kong Polytechnic University
Publication Type:
Conference Proceeding
Proceedings of the 14th Asia Pacific Vibration Conference. Dynamics for Sustainable Engineering, 2011, pp. 502 - 510
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The main obstacle for commercialization of active suspensions is that it requires significant power to operate. In order to reduce the energy consumption, practical active suspension design focuses on primary control target identified from the general control object. This research proposes a novel method for onboard monitoring of the energy levels of vibration modes of a vehicular system, and identifying the dominant vibration mode, e.g., one of roll, pitch, bounce and articulation four modes, to be suppressed as the first priority. The method proposed for the identification of dominant vibration mode is so called mode energy method. This method can fast calculate mode energy from system state vector to indicate the intensity of a vibration mode. Simulation on a 4 degree of freedom half car model is performed to validate the method, under an impulse maneuver input. The system vibration mode energy distribution has been investigated for both undamped and damped cases.
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