Apparatus for improving operational performance of a machine or device
AssigneesPolytechnic University, Omnitek Research & Development, Inc.
InventorsFarshad Khorrami, Jahangir Rastegar
Life of this patent
Estimating the term…
Abstract
Apparatus for compensating for positioning, pointing and/or orientation errors caused by deflections of structural members and components of a high performance machine or device and/or for reducing vibration inputs to such machine or device and/or for micro-positioning such machine or device so as to improve the operational performance of such machine or device. The apparatus utilizes one or more active-type actuators, such as piezoelectric ceramic type actuators, which are arranged in a predetermined manner relative to the machine or device. A servo control device operating in accordance with a predetermined algorithm may be utilized for controlling the actuators or, alternatively, the apparatus may operate in an open loop manner.
Claims47
Apparatus for compensating for deflection of a deflectable member, said apparatus comprising:
- at least one attachment member coupled to said deflectable member, one of said attachment members includes inner and outer members and at least two connecting members respectively fixedly coupled at opposite respective ends thereof to said inner and outer members, said inner member being fixedly attached to said deflectable member, and each of said at least two connecting members has a relatively high stiffness in at least one direction and a relatively low stiffness in another direction;
- and
- actuator means coupled to said at least one attachment member for moving said deflectable member so as to compensate for said deflection of said deflectable member, said actuator means includes an active-type device having a movable portion which moves in a predetermined direction, said actuator means being arranged such that said predetermined direction is substantially parallel to an axis of said deflectable member.
Apparatus for compensating for deflection of a deflectable member, said apparatus comprising:
- first and second attachment members each coupled to said deflectable member, one of said first and second attachment members includes inner and outer members and at least two connecting members respectively fixedly coupled at opposite respective ends thereof to said inner and outer members, said inner member being fixedly attached to said deflectable member, and each of said at least two connecting members has a relatively high stiffness in at least one direction and a relatively low stiffness in another direction;
- and
- a plurality of actuator means each coupled to said outer member of the one of said first and second attachment members and to the other of said first and second attachment members and arranged at a respective predetermined distance from said deflectable member for exerting a moment on said deflectable member so as to compensate for said deflection of said deflectable member.
Apparatus for compensating for deflection of a deflectable member, said apparatus comprising:
- means for detecting at least one of deflection of said deflectable member and a derivative thereof and for producing a detection signal therefrom;
- control means for generating a control signal in response to said detection signal;
- actuator means for moving said deflectable member in response to said control signal so as to compensate for said deflection of said deflectable member, said actuator means including a movable portion which moves in a predetermined direction and said actuator means being arranged such that said predetermined direction is substantially parallel to an axis of said deflectable member;
- and
- two attachment members each coupled to said actuator means and said deflectable member, one of said attachment members includes inner and outer members and at least two connecting members respectively fixedly coupled at opposite respective ends thereof to said inner and outer members, said inner member being fixedly attached to said deflectable member, and each of said at least two connecting members has a relatively high stiffness in at least one direction and a relatively low stiffness in another direction.
Apparatus for compensating for deflection of a deflectable member, said apparatus comprising:
- means for detecting at least one of deflection of said deflectable member and a derivative thereof and for producing a detection signal therefrom;
- control means for generating a control signal in response to said detection signal;
- first and second attachment members each coupled to said deflectable member, one of said first and second attachment members includes inner and outer members and at least two connecting members respectively fixedly coupled at opposite respective ends thereof to said inner and outer members, said inner member being fixedly attached to said deflectable member, and each of said at least two connecting members has a relatively high stiffness in at least one direction and a relatively low stiffness in another direction;
- and
- a plurality of actuator means each coupled to said first and second attachment members and arranged at a respective predetermined distance from said deflectable member for exerting a moment on said deflectable member in response to said control signal so as to compensate for said deflection of said deflectable member.
Apparatus for providing a controlled deflection of a deflectable member, said apparatus comprising:
- two attachment members each directly coupled to said deflectable member;
- and
- at least one support column means each coupled to said attachment members and having a hydraulic-type actuator and a piezoelectric ceramic-type actuator for exerting a force on said attachment members so as to provide said controlled deflection of said deflectable member.
Apparatus for providing a controlled deflection of a deflectable member by deforming said deflectable member, said apparatus comprising:
- at least one attachment member integrally attached to said deflectable member and having at least one U-shaped portion;
- and
- at least one actuator means directly coupled to said U-shaped portion for exerting a force on said attachment member so as to deform said deflectable member.
Apparatus for providing a controlled deflection of a deflectable member, said apparatus comprising:
- at least one attachment member coupled to said deflectable member, one of said attachment members includes inner and outer portions and at least one connecting member fixedly coupled at opposite ends thereof to said inner and outer portions, each said connecting member having a relatively high stiffness in at least one direction and a relatively low stiffness in another direction;
- and
- actuator means coupled to said at least one attachment member for moving said deflectable member so as to provide said controlled deflection of said deflectable member.
Apparatus for providing a controlled deflection of a deflectable member by deforming said deflectable member, said apparatus comprising:
- two attachment members each directly coupled to said deflectable member;
- and
- at least one actuator means directly coupled to said two attachments members, in which each said actuator means exerts a force on each of said two attachment members so as to deform said deflectable member.
Dependencies are inferred from the claim text.