Abstract:

In this paper，the feedforward-feedback hybrid FxLMS（Filtered-x Least Mean Square） algorithm is employed to control the active hydraulic mount with oscillating coil actuator for the narrowband and broadband vibration issues at the autobody end of the mount. Based on the preliminary work of mechanical model， mathematical model and all parameters identification of the active mount， MATLAB/Simulink is used to perform offline simulation of the active mount control system. The result shows that the hybrid algorithm can suppress vibrations at the autobody end more effectively compared to the feedforward FxLMS algorithm. A controller prototype is developed and full object bench experiment is carried out to test the vibration control performance of the hybrid algorithm. The result shows that the hybrid algorithm can reduce the overall vibrations at the autobody end by 11 dB to 23 dB. By combining the advantages of both feedforward and feedback FxLMS algorithm， the hybrid algorithm effectively reduces the adverse impacts of vibrations.

Key words: vehicle engineering, powertrain active mount, oscillating coil actuator, hybrid algorithm, active vibration control