Dorene Kewley Robert L. Clark
Dept. of Mech. Eng. and Mater. Sci., Duke Univ., Durham, NC 27708-0300
Steve C. Southward
Lord Corp., Cary, NC 27511
A novel adaptive filter structure has been proposed for the control of systems characterized by higher harmonic response. The control approach has been designated the higher-harmonic time-averaged, gradient (H-TAG) descent algorithm. In the H-TAG algorithm, a single frequency reference input is all that is required to implement the controller. The remaining harmonics are generated internally based upon simple trigonometric relationships. In addition, the algorithm is ideal for structures characterized by slowly time-varying parameters since no system identification is required to implement the algorithm. Results from simulations and experiments indicate that the proposed approach offers a unique method of achieving significant levels of attenuation in the harmonic vibration or acoustic response of structures.