Vibration Control Using Semi-Active Force Generators

5,020,781 6/1991 Huang ................................. 267/136 5,248,015 9/1993 Yoshioka et al. ................... 188/299 5,269,557 12/1993 Butsuen et al. ..... ... 280/707 5,276,623 1/1994 Wolfe .............. ... 364/424.05 5,295,705 3/1994 Butsuen et al. ..................... 280/707 5,303,155 4/1994 Kallenbach et al. ... 364/424.05 5,313,390 5/1994 Schramm et al. ...... ... 364/424.05 5,324,067 6/1994 Kallenbach et al. ................ 280/707 5,346,242 9/1994 Karnopp ............................. 280/707