Electronically programmable actively damped sensor mount

• US 7,036,639 B2
• Filed: 06/15/2004
• Issued: 05/02/2006
• Est. Priority Date: 08/29/2003
• Status: Active Grant

• Current Assignee: DRS Sustainment Systems, Inc (Leonardo S.p.A.)
• Original Assignee: DRS Systems and Electronics
• Inventors: Exely, Bruce, Linton, Thomas, Talir, Robert
• Primary Examiner(s): Kramer, Devon C.
• Application Number:
  US10/868,684
• Publication Number:
  US 20050056111A1
• Time in Patent Office: 686 Days
• Field of Search: 89/410.2, 188/378, 188/137, 188/162, 188/180, 188/181.A, 188/181.T
• US Class Current: 188/137
• CPC Class Codes: F16F 15/02 Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems F16F15/005 takes precedence ; layered products B32B; suppression of vibration in ships B63; relieving load on bearings, using magnetic means F16C39/06
• CPC Class Codes: F16F 15/027 comprising control arrangements F16F15/0237 takes precedence
• CPC Class Codes: F16F 15/10 Suppression of vibrations in rotating systems by making use of members moving with the system by balancing F16F15/22 ; yielding couplings F16D3/00 ; with flywheels acting variably or intermittently F16H ; construction providing resilience or vibration-damping for gear elements F16H55/14
• CPC Class Codes: F41A 27/30 Stabilisation or compensation systems, e.g. compensating for barrel weight or wind force on the barrel
• CPC Class Codes: F41H 5/26 Peepholes; Windows; Loopholesmanufacture or composition of glass C03; Covers therefor informative reference: transparent bullet-proof laminates F41H5/0407; layered products essentially comprising glass B32B17/06
• CPC Class Codes: Y10T 74/20012 Multiple controlled elements
• CPC Class Codes: Y10T 74/20317 including electric motor

Abstract

An active damping system for damping the rotation of an object to an extent dependent upon the angular velocity of the object utilizes a feedback mechanism and provides a robust method for rotational damping. The active damping system comprises a torque controller, a speed measuring device connected to said torque controller for measuring a speed correlated with the rotation to be damped, and a torque generating device for producing the damping torque, which is controlled by the torque controller. Where the torque controller is a microprocessor, various defined relationships between the rotation to be damped and the damping torque can be programmed into the torque controller, which can also perform diagnostics on the active damping system. Both the programmability and the ability to perform diagnostics allow the active damping system to respond reproducibly over a range of environmental conditions.

Claims

1. An assembly for mounting an object comprising:

at least one support arm;

at least one connector through which said object is rotationally attached to said support arm such that rotation of said object may occur about a first axis of rotation;

a base rotatably connected to said support arm such that rotation of said support arm relative to said base occurs about a second axis of rotation; and

at least one active damping system for damping the rotation of an object to an extent dependent upon the angular velocity of the object, said active damping system comprising;

a torque controller;

a speed measuring device connected to said torque controller so as to allow speed measurement data created by said speed measuring device in connection with a speed measurement correlated to rotation of said object to be transferred to said torque controller; and

a torque generating device connected to said torque controller so as to allow said torque controller to transmit damping torque data to said torque generating device to control a damping torque generated by said torque generating device;

wherein said damping torque acts in a decelerating manner on the rotation of said object;

wherein said at least one active damping system includes a first active damping system capable of conveying a damping torque that acts to oppose rotation of said object about said first axis of rotation.

2. An assembly for mounting an object of claim 1 wherein said object is one of a sensor suite, a camera, a light, and a telescope.

3. An assembly for mounting an object of claim 1 wherein said at least one active damping system includes a second active damping system capable of conveying a damping torque that acts to oppose rotation of said object about said second axis of rotation.

4. An assembly for mounting an object of claim 3 wherein said first and second axes of rotation are perpendicular.

5. An assembly for mounting an object of claim 3, wherein for both of said active damping system and said second active damping system:

said torque generating device comprises an electric motor;

said speed measuring device comprises an encoder; and

said torque controller comprises a microprocessor.

6. An assembly for mounting an object of claim 5, further comprising:

at least one resolver connected to said object so as to enable said resolver to operate as a sensor of the rotational position of said object; and

wherein said at least one resolver includes a first resolver capable of sensing the rotational position of said object relative to said first axis, and a second resolver capable of sensing the rotational position of said object relative to said second axis.