CONTROL DEVICE

• US 20090031840A1
• Filed: 08/24/2007
• Published: 02/05/2009
• Est. Priority Date: 07/31/2007
• Status: Active Grant

• Current Assignee: WITTENSTEIN SE
• Original Assignee: WITTENSTEIN aerospace & simulation Ltd
• Inventors: Cowling, David A.
• Granted Patent: US 8,505,406 B2
• Time in Patent Office: Days
• US Class Current: 74/471.XY
• CPC Class Codes: G05G 1/04 Controlling members for hand actuation by pivoting movement, e.g. levers
• CPC Class Codes: G05G 2009/04762 Force transducer, e.g. strain gauge
• CPC Class Codes: G05G 2009/04766 providing feel, e.g. indexing means, means to create counterforce
• CPC Class Codes: G05G 9/047 the controlling member being movable by hand about orthogonal axes, e.g. joysticks for switches H01H25/04
• CPC Class Codes: Y10T 74/20012 Multiple controlled elements
• CPC Class Codes: Y10T 74/2014 Manually operated selector [e.g., remotely controlled device, lever, push button, rotary dial, etc.]
• CPC Class Codes: Y10T 74/20201 Control moves in two planes

Abstract

A control device comprising: a reference frame; a stick; a pivot mounting the stick to the reference frame and defining a pivot axis; and an actuator for rotating the stick about the pivot axis. Mass balance is achieved by offsetting the centres of mass of the actuator and the stick from the pivot axis. Typically a line joining the centres of mass of the actuator and the stick substantially passes through the pivot axis. The actuator is a rotary actuator having a stator coupled to the stick and a rotor coupled to the reference frame.

Claims

1. A control device comprising:

a reference frame;

a stick;

a pivot mounting the stick to the reference frame and defining a pivot axis; and

an actuator for rotating the stick about the pivot axis, wherein the actuator and the stick are offset from the pivot axis such that if the control device is subjected to an acceleration orthogonal to the pivot axis, then the mass of the actuator and the mass of the stick generate moments about the pivot axis which act in opposite directions.

2. The control device of claim 1, wherein a line passing through the pivot axis and the centre of mass of the stick passes substantially through the centre of mass of the actuator.

3. The device of claim 1 wherein the actuator is a rotary actuator having a stator coupled to the stick and a rotor coupled to the reference frame by a drive link and configured to rotate relative to the stator about a drive axis which is not co-linear with the pivot axis.

4. The device of claim 1 wherein the device is substantially mass balanced about the pivot axis such that if the control device is subjected to an acceleration orthogonal to the pivot axis, then the mass of the actuator and the mass of the stick generate moments about the pivot axis which act in opposite directions and are substantially equal.

5. The device of claim 1 further comprising a sensor for sensing a force applied to the stick.

6. The device of claim 5 wherein the sensor detects the output of the actuator.

7. The device of claim 1 further comprising a second pivot mounting the reference frame to a second reference frame and defining a second pivot axis;

and an actuator for rotating the reference frame about the second pivot axis.

8. A control device comprising:

a reference frame;

a stick;

a pivot mounting the stick to the reference frame and defining a pivot axis; and

a rotary actuator having a stator coupled to the stick and a rotor coupled to the reference frame by a drive link and configured to rotate relative to the stator about a drive axis which is not co-linear with the pivot axis.

9. The device of claim 8 wherein the drive link is pivotally coupled to the rotor by a first drive pivot and to the reference frame by a second drive pivot.

10. The device of claim 8 wherein the drive axis is not parallel with the pivot axis.

11. The device of claim 8 wherein the drive axis substantially intersects with the pivot axis.

12. The device of claim 8 wherein the drive axis is substantially parallel with the pivot axis.

13. The device of claim 8 wherein the drive axis is substantially co-linear with a line passing through the pivot axis and the centre of mass of the stick

14. The device of claim 8 wherein the device is substantially mass balanced about the pivot axis such that if the control device is subjected to an acceleration orthogonal to the pivot axis, then the mass of the actuator and the mass of the stick generate moments about the pivot axis which act in opposite directions and are substantially equal.

15. The device of claim 8 further comprising a sensor for sensing a force applied to the stick.

16. The device of claim 15 wherein the sensor detects the output of the actuator.

17. The device of claim 8 further comprising a second pivot mounting the reference frame to a second reference frame and defining a second pivot axis;

and an actuator for rotating the reference frame about the second pivot axis.