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US 7,126,744 B2Granted
Stabilization of closed loop operation of a torsional hinged device
AssigneeTexas Instruments Incorporated
InventorsArthur Monroe Turner, Mark W. Heaton
Life of this patent
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Abstract
Apparatus and methods for removing jitter and stabilizing the feed back system of a torsional hinged device with minimal changes to the system. The stabilization is accomplished by introducing a selected amount of lateral motion (in addition to the rotational motion) by creating asymmetry in the oscillating device or the drive torque applied to the device.
Claims25
A torsional hinged scanning system comprising:
- an oscillating assembly comprising a pivoting device supported by a pair of torsional hinges lying along a pivot axis and a drive mechanism responsive to a drive signal for oscillating said pivoting device about said pivoting axis according to a selected velocity profile, said scanning system including asymmetric features that generate lateral motion due to the primary oscillation of the device;
- a sensing device for sensing the position of said pivoting device and generating signals representative of said sensed position;
- control circuitry connected to receive said signals representative of said sensed position and for determining the parameters of said drive signal necessary to maintain said velocity profile.
A method for stabilizing the rotational motion of a torsional hinged device comprising the steps of:
- providing a pivoting device supported by torsional hinges lying along a pivot axis;
- oscillating said pivoting device about said pivot axis according to a selected velocity profile in response to a drive signal;
- introducing lateral motion to said oscillating device;
- sensing the position of said oscillating device and generating a signal representative of said position;
- receiving said generated signal to compute the drive signal required to maintain said velocity profile;
- and
- generating said drive signal.
4 more elements
Dependencies are inferred from the claim text.