Harmonic force generator for an active vibration control system
First Claim
Patent Images
1. A force generator comprising:
- a rotationally fixed first circular member defined about a first axis to define a first inner diameter circular path, said first circular member having a first radius;
a second circular member defined about a second axis offset from said first axis to define a second radius;
a crank which mounts said second circular member, said crank rotatable about said first axis;
a mass located adjacent a circumference of said second circular member movable about a two-cusp hypocycloid path to generate a vibratory inertial force;
a processor;
a sensor system in communication with said processor; and
a power source which drives said crank, said processor controls said power source to drive said crank such that a phase and magnitude of the vibratory inertial force is continuously varied to reduce an externally generated vibratory force sensed by said sensor system.
1 Assignment
0 Petitions
Accused Products
Abstract
A force generator for an active vibration control (AVC) system provides a mass located upon an inner circular member which is movable within an outer circular member to simultaneously complete one revolution about its axis as it orbits within the outer circular member to compensate for sensed vibrations. A crank mounts the inner circular member and a counterweight. The crank is rotated by a prime mover such as an electric motor. The mass will therefore generate a sinusoidal inertial force in a straight line. Multiple systems are suitably arranged to be used in conjunction with one another to provide a wide range of inertial force outputs.
-
Citations
13 Claims
-
1. A force generator comprising:
-
a rotationally fixed first circular member defined about a first axis to define a first inner diameter circular path, said first circular member having a first radius; a second circular member defined about a second axis offset from said first axis to define a second radius; a crank which mounts said second circular member, said crank rotatable about said first axis; a mass located adjacent a circumference of said second circular member movable about a two-cusp hypocycloid path to generate a vibratory inertial force; a processor; a sensor system in communication with said processor; and a power source which drives said crank, said processor controls said power source to drive said crank such that a phase and magnitude of the vibratory inertial force is continuously varied to reduce an externally generated vibratory force sensed by said sensor system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
Specification