Vibration absorber
A dynamically tuned vibration absorber includes a magnetic dynamic mass, a repulsive magnetic system, and an attractive magnetic system. The repulsive magnetic system includes one or more repulsive magnets positioned to resist translation of the dynamic mass away from an equilibrium position by magnetic repulsion. The attractive magnetic system includes one or more attractive magnets positioned to aid the translation of the dynamic mass away from the equilibrium position by magnetic attraction. The magnetic repulsion and the magnetic attraction collectively exert a net repulsive force on the dynamic mass that resists the translation of the dynamic mass away from the equilibrium position. One of the repulsive and attractive magnetic systems is a dynamically variable. The dynamically variable system includes at least one field manipulation actuator configured to move the one or more magnets of the dynamically variable system to adjust the net repulsive force exerted on the dynamic mass.
1 . A dynamically tuned vibration absorber comprising:
a magnetic dynamic mass having an equilibrium position, wherein the magnetic dynamic mass is translatable away from the equilibrium position;
a repulsive magnetic system comprising one or more repulsive magnetic elements positioned to resist translation of the magnetic dynamic mass away from the equilibrium position by magnetic repulsion between the one or more repulsive magnetic elements and the magnetic dynamic mass; and
an attractive magnetic system comprising one or more attractive magnetic elements positioned to aid the translation of the magnetic dynamic mass away from the equilibrium position by magnetic attraction between the one or more attractive magnetic elements and the magnetic dynamic mass;
wherein the magnetic repulsion and the magnetic attraction collectively exert a net magnetic repulsive force on the magnetic dynamic mass that resists the translation of the magnetic dynamic mass away from the equilibrium position;
wherein one of the repulsive magnetic system and the attractive magnetic system is a first dynamically variable magnetic system comprising:
at least one field manipulation actuator coupled to the one or more magnetic elements of the first dynamically variable magnetic system and configured to move the one or more magnetic elements of the first dynamically variable magnetic system to adjust the net magnetic repulsive force exerted on the magnetic dynamic mass;
wherein the vibration absorber further comprises:
a frequency sensor positioned to measure a vibration frequency of an object to which the vibration absorber is secured;
one or more processors communicatively coupled to each of the at least one field manipulation actuator and the frequency sensor; and
a memory communicatively coupled to at least one of the processors, the memory storing computer-readable instructions executable by the one or more processors, wherein the computer-readable instructions when executed configure the one or more processors to collectively:
receive, from the frequency sensor, a vibration frequency signal associated with the object; and
transmit, to each of the at least one field manipulation actuator, one or more commands to control movement of the one or more magnetic elements of the first dynamically variable magnetic system based on the vibration frequency signal.
2 . The vibration absorber of claim 1 , wherein the net magnetic repulsive force increases generally linearly with displacement of the magnetic dynamic mass from the equilibrium position.
3 . The vibration absorber of claim 1 , wherein the memory stores a plurality of predetermined resistance protocols and, in response to receiving the vibration frequency signal, the one or more processors are configured to:
select one of the plurality of resistance protocols that is associated with the received vibration frequency signal.
4 . The vibration absorber of claim 3 , wherein the one or more commands instruct each of the at least one field manipulation actuator to automate the selected resistance protocol.
5 . The vibration absorber of claim 1 , wherein:
the one or more repulsive magnetic elements comprise an outer ring magnet; and
the magnetic dynamic mass comprises a dynamic inner ring magnet positioned within and oriented in repulsion to the outer ring magnet.
6 . The vibration absorber of claim 1 , wherein:
the magnetic dynamic mass comprises a dynamic magnetic element;
the one or more attractive magnetic elements comprise a first attractive magnet positioned away from the dynamic magnetic element in a first direction and a second attractive magnet positioned away from the dynamic magnetic element in a second direction opposite the first direction; and
each of the first and second attractive magnets are oriented in attraction to the dynamic magnetic element.
7 . The vibration absorber of claim 6 , wherein:
the magnetic attraction occurs between the first attractive magnet and the dynamic magnetic element as the magnetic dynamic mass translates away from the equilibrium position in the first direction; and
the magnetic attraction occurs between the second attractive magnet and the dynamic magnetic element as the magnetic dynamic mass translates away from the equilibrium position in the second direction.
8 . The vibration absorber of claim 6 , wherein the dynamic magnetic element is a dynamic magnet.
9 . The vibration absorber of claim 6 , wherein:
the attractive magnetic system is the first dynamically variable magnetic system; and
the at least one field manipulation actuator is coupled to the first and second attractive magnets and configured to move the first and second attractive magnets to adjust the net magnetic repulsive force exerted on the magnetic dynamic mass.
10 . The vibration absorber of claim 1 , wherein the magnetic dynamic mass is coupled to and translatable along a linear track that guides the translation of the magnetic mass away from the equilibrium position.
11 . A dynamically vibration absorber comprising:
a magnetic dynamic mass having an equilibrium position, wherein the magnetic dynamic mass is translatable away from the equilibrium position;
a repulsive magnetic system comprising one or more repulsive magnetic elements positioned to resist translation of the magnetic dynamic mass away from the equilibrium position by magnetic repulsion between the one or more repulsive magnetic elements and the magnetic dynamic mass; and
an attractive magnetic system comprising one or more attractive magnetic elements positioned to aid the translation of the magnetic dynamic mass away from the equilibrium position by magnetic attraction between the one or more attractive magnetic elements and the magnetic dynamic mass,
wherein the magnetic repulsion and the magnetic attraction collectively exert a net magnetic repulsive force on the magnetic dynamic mass that resists the translation of the magnetic dynamic mass away from the equilibrium position;
wherein one of the repulsive magnetic system and the attractive magnetic system is a first dynamically variable magnetic system comprising:
at least one field manipulation actuator coupled to the one or more magnetic elements of the first dynamically variable magnetic system and configured to move the one or more magnetic elements of the first dynamically variable magnetic system to adjust the net magnetic repulsive force exerted on the magnetic dynamic mass;
wherein the magnetic dynamic mass comprises a dynamic magnetic element;
wherein the one or more attractive magnetic elements comprise a first attractive magnet positioned away from the dynamic magnetic element in a first direction and a second attractive magnet positioned away from the dynamic magnetic element in a second direction opposite the first direction;
wherein each of the first and second attractive magnets are oriented in attraction to the dynamic magnetic element;
wherein the attractive magnetic system is the first dynamically variable magnetic system; and
wherein the at least one field manipulation actuator is coupled to the first and second attractive magnets and configured to move the first and second attractive magnets to adjust the net magnetic repulsive force exerted on the magnetic dynamic mass.
12 . The vibration absorber of claim 11 , wherein:
the at least one field manipulation actuator comprises a first linear actuator coupled to the first attractive magnet and a second linear actuator coupled to the second attractive magnet;
the first linear actuator is operable to translate the first attractive magnet toward and away from the magnetic dynamic mass; and
the second linear actuator is operable to translate the second attractive magnet toward and away from the magnetic dynamic mass.
13 . The vibration absorber of claim 12 , wherein:
translation of the first and second attractive magnets toward the magnetic dynamic mass brings the magnetic fields produced by each of the first and second attractive magnets closer to the magnetic dynamic mass when the magnetic dynamic mass is in equilibrium position; and
translation of the first and second attractive magnets away from the magnetic dynamic mass moves the magnetic fields produced by each of the first and second attractive magnets farther from the magnetic dynamic mass when the magnetic dynamic mass is in equilibrium position.
14 . The vibration absorber of claim 11 , wherein:
the at least one field manipulation actuator comprises a first rotary actuator coupled to the first attractive magnet and a second rotary actuator coupled to the second attractive magnet;
the first rotary actuator is operable to rotate the first attractive magnet relative to the magnetic dynamic mass; and
the second rotary actuator is operable to rotate the second attractive magnet relative to the magnetic dynamic mass.
15 . The vibration absorber of claim 14 , wherein rotation of the first and second attractive magnets relative to the magnetic dynamic mass changes an angle at which the magnetic field produced by each of the first and second attractive magnets is directed toward the magnetic dynamic mass.
16 . The vibration absorber of claim 11 , further comprising:
a frequency sensor positioned to measure a vibration frequency of an object to which the vibration absorber is secured;
one or more processors communicatively coupled to the current source and the frequency sensor; and
a memory communicatively coupled to at least one of the processors, the memory storing computer-readable instructions executable by the one or more processors, wherein the computer-readable instructions when executed configure the one or more processors to collectively:
receive, from the frequency sensor, a vibration frequency signal associated with the object; and
transmit, to the current source, one or more electrical signals to adjust the net magnetic repulsive force exerted on the magnetic dynamic mass based on the vibration frequency signal.
17 . The vibration absorber of claim 16 , wherein the memory stores a plurality of predetermined resistance protocols and, in response to receiving the vibration frequency signal, the one or more processors are configured to:
select one of the plurality of resistance protocols that is associated with the received vibration frequency signal.
18 . A dynamically tuned vibration absorber comprising:
a magnetic dynamic mass having an equilibrium position, wherein the magnetic dynamic mass is translatable away from the equilibrium position;
a repulsive magnetic system comprising one or more repulsive magnetic elements positioned to resist translation of the magnetic dynamic mass away from the equilibrium position by magnetic repulsion between the one or more repulsive magnetic elements and the magnetic dynamic mass; and
an attractive magnetic system comprising one or more attractive magnetic elements positioned to aid the translation of the magnetic dynamic mass away from the equilibrium position by magnetic attraction between the one or more attractive magnetic elements and the magnetic dynamic mass;
wherein the magnetic repulsion and the magnetic attraction collectively exert a net magnetic repulsive force on the magnetic dynamic mass that resists the translation of the magnetic dynamic mass away from the equilibrium position;
wherein one of the repulsive magnetic system and the attractive magnetic system is a dynamically variable magnetic system, and
each of the one or more magnetic elements of the dynamically variable magnetic system is an electromagnet, and the net magnetic repulsive force exerted on the magnetic dynamic mass is adjustable based on an electrical current supplied to the one or more electromagnets of the dynamically variable magnetic system;
wherein the vibration absorber, further comprises:
a current source electrically coupled to the one or more electromagnets of the dynamically variable magnetic system and configured to supply the one or more electromagnets of the dynamically variable magnetic system with the electrical current;
a frequency sensor positioned to measure a vibration frequency of an object to which the vibration absorber is secured;
one or more processors communicatively coupled to the current source and the frequency sensor;
a memory communicatively coupled to at least one of the processors, the memory storing computer-readable instructions executable by the one or more processors, wherein the computer-readable instructions when executed configure the one or more processors to collectively;
receive, from the frequency sensor, a vibration frequency signal associated with the object; and
transmit, to the current source, one or more electrical signals to adjust the net magnetic repulsive force exerted on the magnetic dynamic mass based on the vibration frequency signal.
19 . The vibration absorber of claim 18 , wherein the net magnetic repulsive force increases generally linearly with displacement of the magnetic dynamic mass from the equilibrium position.
20 . The vibration absorber of claim 18 , wherein:
the attractive magnetic system is the dynamically variable magnetic system and comprises the one or more electromagnets;
the one or more electrical signals transmitted to the current source instruct the current source to increase the electrical current supplied to the one or more electromagnets of the dynamically variable magnetic system to decrease the net magnetic repulsive force exerted on the magnetic dynamic mass; and
the one or more electrical signals transmitted to the current source instruct the current source to decrease the electrical current supplied to the one or more electromagnets of the dynamically variable magnetic system to increase the net magnetic repulsive force exerted on the magnetic dynamic mass.