CA3182352A1 - Assembly and method for measuring force feedback - Google Patents
Assembly and method for measuring force feedbackInfo
- Publication number
- CA3182352A1 CA3182352A1 CA3182352A CA3182352A CA3182352A1 CA 3182352 A1 CA3182352 A1 CA 3182352A1 CA 3182352 A CA3182352 A CA 3182352A CA 3182352 A CA3182352 A CA 3182352A CA 3182352 A1 CA3182352 A1 CA 3182352A1
- Authority
- CA
- Canada
- Prior art keywords
- shaft
- trim
- handle
- stab
- assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/16—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/26—Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
- G09B9/02—Simulators for teaching or training purposes for teaching control of vehicles or other craft
- G09B9/08—Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of aircraft, e.g. Link trainer
- G09B9/28—Simulation of stick forces or the like
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
An assembly and method for measuring a force feedback of a stab trim in a flight simulator or aircraft, the stab trim comprising a trim wheel comprising a shaft receiving aperture arranged along an axis of the trim wheel is disclosed. The assembly comprises an elongate shaft configured for insertion into the aperture and comprising a shaft axis, a handle arranged substantially radially to the shaft axis and a load cell interconnecting the shaft and the handle wherein the load cell is configured formeasu ring a torque between the handle and the shaft.
Description
TITLE OF THE INVENTION
ASSEMBLY AND METHOD FOR MEASURING FORCE FEED BACK
FIELD OF THE INVENTION
[0001]The present invention relates to an assembly and method for measuring a force feedback. In particular, the present invention relates adaptors for connecting a force gauge to a control interface such as a yoke, stick, sidestick, rudder pedal or stab trim, in particularfor use in a flight simu latoror aircraft, and an apparatus and method for calibrating a simulated control interface such as a yoke, stick, sidestick, rudder pedal or stab trim in a flightsimulatoror aircraft.
BACKGROUND TO THE INVENTION
ASSEMBLY AND METHOD FOR MEASURING FORCE FEED BACK
FIELD OF THE INVENTION
[0001]The present invention relates to an assembly and method for measuring a force feedback. In particular, the present invention relates adaptors for connecting a force gauge to a control interface such as a yoke, stick, sidestick, rudder pedal or stab trim, in particularfor use in a flight simu latoror aircraft, and an apparatus and method for calibrating a simulated control interface such as a yoke, stick, sidestick, rudder pedal or stab trim in a flightsimulatoror aircraft.
BACKGROUND TO THE INVENTION
[0002] Vehicle simulators such as those for simu latin g the operation of an aircraft have been developed to provide a realistic analogue of the vehicle being simulated withoutthe dangers in herent in having such a vehicle operated by a novice or under extreme conditions. As the realism of the simulators has improved, they have become an indispensable component in the certification of vehicle operators such as pilots. In order to ensure that a given simulator meets the requisite realism such thatthey can be used as part of a certification program, the operation of various components must be measured versus a preapproved certification standard and, as necessary, the components must be recalibrated.
In particular, systems such as sidesticks and stab trims, which provide an instantaneous force feedback to the operator where the amount of force is an indication ofthe cu rrent state of a componentof the veh icle being operated (such as the flaps, ailerons and elevators on an aircraft) are required to provide a simulated force feedback th at reproduces the levels of force feedback as would be experienced by the operator during actual operation.
In particular, systems such as sidesticks and stab trims, which provide an instantaneous force feedback to the operator where the amount of force is an indication ofthe cu rrent state of a componentof the veh icle being operated (such as the flaps, ailerons and elevators on an aircraft) are required to provide a simulated force feedback th at reproduces the levels of force feedback as would be experienced by the operator during actual operation.
[0003] Methods for measuring the force feedback of a sidestick and stab trim Date Recue/Date Recieved 2022-11-23 during operation of the simulator are known in the art. One drawback of these methods is that the measurements are not readily reproducible from time to time and simulator to simulator.
SUMMARY OF THE INVENTION
SUMMARY OF THE INVENTION
[0004] In order to address the above and other drawbacks, there is provided an adaptor for positioning a force gauge relative to a control interface in a flight simulator or aircraft. The force gauge comprises a gauge handle and a gauge connector, the control interface being moveable in at least one of a back-and-forth direction and a side-to-side direction, the adaptor comprising a housing positionable adjacent the control interface, said housing comprising a first surface configured to snugly receive a predetermined surface of the control interface, and a second surface comprising a first housing con nector configured for connection to the gauge connector such that pressure is exertable on the control interface by the force gauge in a first direction of measurement aligned with at least one of the back-and-forth direction and the side-to-side direction.
[0005]There is also provided a kit for measuring a force feedback of a control interface in a flight simu latoror aircraft, the control interface moveable in a back-and-forth direction to change one of a pitch and a yaw of the simulator and in a side-to-side direction to change a roll of the simulator. The kit comprises a force gauge comprising a gauge handle, a gauge attachment portion and a first direction of measurement, and a housing positionable adjacent the control interface, the housing comprising a first inner surface configured to snugly receive a predetermined surface of the control interface and a second surface comprising a first point of attachment configured for attachment to the gauge attachment portion such that the first direction of measurement is aligned with one of the back-and-forth direction and the side-to-side direction.
[0006] Additionally, there is provided a method for testing a force feedback of a control interface in a flightsimulator, the control interface being moveable in at Date Recue/Date Recieved 2022-11-23 least one of a back-and-forth direction to change a pitch or a yaw of the simulator and in a side-to-side direction to change a roll of the simulator. The method comprises placing an adaptorcomprising a first poi nt of attachment adjacentthe control interface, connecting a force gauge to the first point of attachment such that a first direction of measurementof the force gauge is aligned with one of the back-and-forth direction and the side-to-side direction, and moving a gauge handle portion of the force gauge in the first direction of measurement, thereby causing the force gauge to measure the force feedback generated by the control interface in the first measurement direction .
[0007]Fu rthermore, there is provided an assembly for measuring a force feedback of a stab trim in a flight simu lator or aircraft, the stab trim comprising a trim wheel comprising a shaft receiving aperture arranged along an axis of the trim wheel. The assembly comprises an elongate shaft configured for insertion into the aperture and comprising a shaft axis, a handle arranged substantially radially to the shaft axis, and a load cell interconnecting the shaft and the handle wherein the load cell is configured for measuring a torque between the handle and the shaft.
[0008]Also, there is provided a method of testing a stab trim in a cockpit simulator or aircraft, the stab trim comprising a trim wheel comprising a shaft receiving aperture arranged along an axis thereof. The method comprises interconnecting a shaftto a handle wherein the shaft comprises a sh aft axis and the handle is arranged substantially radially to the shaft axis, inserting the shaft into the aperture, operating the simulator, and measuring a torque between the handle and the shaft.
Date Recue/Date Recieved 2022-11-23 BRIEF DESCRIPTION OF THE DRAWINGS
Date Recue/Date Recieved 2022-11-23 BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1A provides a rear right raised perspective view of an adaptor bracket in accordance with a first illustrative embodiment of the present invention;
[0010] Figure 1 B provides a front plan view of an adaptor bracket in accordance with a first illustrative embodiment of the present invention;
[0011] Figu re 1C provides a rear plan view of an adaptor bracket in accordance with a first illustrative embodiment of the present invention;
[0012] Figure 1D provides a top plan view of an adaptor bracket in accordance with a first illustrative embodiment of the present invention;
[0013]Figure 1E provides a bottom plan view of an adaptor bracket in accordance with a first illustrative embodimentof the present invention;
[0014] Figure IF provides a right plan view of an adaptor bracket in accordance with a first illustrative embodiment of the present invention;
[0015] Figure 1G provides a left plan view of an adaptor bracket in accordance with a first illustrative embodiment of the present invention;
[0016] Figu re 2 provides an exploded perspective view of an adaptor bracket and sidestick assembly in accordance with a first illustrative embodiment of the present invention;
[0017] Figure 3A provides a rear right raised perspective view of an adaptor bracket, sidestick and force gauge assembly for measuring force feedback in a side-to-side direction in accordance with a first illustrative embodiment of the present invention;
Date Recue/Date Recieved 2022-11-23
Date Recue/Date Recieved 2022-11-23
[0018] Figure 3B provides a rear right raised perspective view of an adaptor bracket, sidestick and force gauge assembly for measuring force feedback in a back to front direction in accordance with a first illustrative embodiment of the present invention;
[0019] Figure 4 provides a partially exploded perspective view of an adaptor bracket and sidestick assembly in accordance with a second illustrative embodiment of the present invention;
[0020] Figure 5 provides a graph of results of a force measurement of a control column in accordance with an illustrative embodiment of the present invention;
[0021] Figure6 provides a raised perspective view of an assembly for measuring torque in a stab trim in accordance with an illustrativeembodimentof the present invention;
[0022] Figure 7 provides a raised perspective view of a stab trim with a shaft and adaptor bracket installed in accordance with an illustrative embodiment of the present invention;
[0023] Figure 8A provides a raised right front perspective view of an adaptor bracket in accordance with an illustrative embodimentof the present invention;
[0024] Figure 8B provides a front plan view of an adaptor bracket in accordance with an illustrative embodimentof the present invention.
[0025] Figure 8C provides a side plan view of an adaptor bracket in accordance with an illustrative embodimentof the present invention.
[0026] Figure 8D provides a rear plan view of an adaptor bracket in accordance with an illustrative embodimentof the present invention.
Date Recue/Date Recieved 2022-11-23
Date Recue/Date Recieved 2022-11-23
[0027]Figure 8E provides a raised left rear perspective view of an adaptor bracket in accordance with an illustrative embodiment of the present invention.
[0028] Figure 9A provides a raised left front perspective view of an adaptor bracket in accordance with a third illustrative embodiment of the present invention;
[0029]Figure 9B provides a right rear front perspective view of an adaptor bracket in accordance with a third illustrative embodiment of the present invention; and
[0030] Figu re '10 provides a rear raised perspective view of an adaptor bracket, rudder pedal and force gauge assembly for measuring force feedback of a rudder pedal in accordance with a third illustrative embodiment of the present invention.
DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS
[0031 ] Referring now to Figure 1A, a first embodiment of an adaptor, generally referred to using the reference numeral 10, will be described. The adaptor 10 comprises a housing 12 illustratively comprised of two complementary plastic parts or halves 14, 16. The first complementary half 14 and the second complementary half 16 may be assembled together using a plu rality of fasteners 18. In a particular embodiment each of the fasteners 18 comprises a bolt 20 inserted through a respective bolt receiving bore 22 in a first of the complementary halves 14, 16 and threaded into a respective one of a plurality of threaded inserts (not shown) in a second one of the two complementary halves 14, 16.
[0032]Still referring to Figure 1A, the housing 12 furthercomprises a first point of attachment 24 and a second pointof attachment26. Each poi ntof attachment 24, 26 illustratively comprises a threaded receptacle 28.
Date Recue/Date Recieved 2022-11-23 [0033]Referring now to Figure 2 in addition to Figure 1A, each of the complementary halves 14, 16 comprises an outer shell 30 manufactured from a rigid material such as hard plastic or the like, and a liner 32 manufactured from a flexible material such as a soft plastic or the like. The in nersu rface 34 of each of the outershells 30 is formed to receive the 1iner32 in a snug fit and such that the liner 32 is held snugly against the inner surface 34. In a particular embodiment an adhesive (not shown)may be used to secure the 1iner32 to a corresponding one of the outershells 30 orthe liner 32 and a corresponding one of the outer shells 30 may be manufactured together as a unitary piece.
[0034] Still referring to Figure 2 in addition to Figure 1A, the liner 32 is formed such that when the complementary halves 14, 16 are assembled together by threading for each one of the fasteners 18 the bolt 20 into the bore 22 via a washer 36 and a threaded insert 38, a sidestick, or control interface, receiving space 40 is defined which is shaped to snugly receive a sidestick/control interface 42 such that the sidestick/control interface 42 is held securely within the sidestick receiving space 40 by the complementary halves 14, 16. In this regard, the I iner32 of each of the complementary halves 14, 16 includesfeatures such as a molded surface 46 or the like which is complementary to the shape of the sidestick/control interface 42, and which ensures thateach time the adaptor is assembled about the sidestick/control interface 42, the positioning of the adaptor 10 on the sidestick/control interface 42 is consistently the same.
Additionally, the complementary halves 14, 16 may furthercomprise apertures 48 or the like allowing control buttons 50 and the like on the sidestick/control interface 42 to be accessed.
[0035] Still referring to Figu re 2, as known in the art the sidestick/control interface 42 is moveable from a central axis A in both a back-and-forth (B-B) direction which for example controls the pitch of an aircraft (not shown) and a side-to-side (C-C) direction which for example controls the roll of the aircraft. The first point of attach ment 24 and second point of attachment 26 are positioned on the outer Date Recue/Date Recieved 2022-11-23 shell 30 of the housing 12 such thatwhen the complementary halves 14, 16 are assembled about the sidestick/control interface 42, the first point of attachment 24 is aligned with the back-and-forth (B-B) direction, and the second point of attachment 26 is aligned with the side-to-side (S-S) direction, the second point of attachment 26 being at right angles to the orientation of the first point of attach ment24. Additionally,the first pointof attachment 24 and the second point of attachment 26 lie in the same plane, which is substantially normal to the axis A of the sidestick/control interface 42. In a particular embodiment, an accelerometer (not shown)can for example be embedded in the outer shell 30 or the like. An exemplary embodiment of an accelerometer comprises a Ph idgetSpatial 3/3/3 Precision accelerometer/magnetometer/gyroscope.
[0036] Referring now to Figure 3A and Figure 3B in addition to Figure 2, as discussed above each of the first point of attachment 24 and the second point of attachment 26 comprises the threaded receptacle 28 (which illustratively comprises a threaded insert 52). In order to measure the force feedback, the sidestick/control interface 42 in the back and forth (B-B) direction or the side-to-side (C-C) direction, once the bracket 10 has been assembled to the sidestick/control interface 42, a force gauge 54 comprising a plunger 56 may be attached to the bracket 10 by threading a threaded end 58 of the plu nger 56 into the threaded receptacle 28 of a respective one of the first point of attachment 24 and the second point of attachment 26. As known in the art, the plunger 56 moves back and forth along a plunger axis. During measurement of the force feedback, the angle of the sidestick/control interface 42 may be measured, for example by reading an outputof an accelerometer or by reading the angle from a simulator output.
[0037] Referring still to Figure 3A, the force feedback of the sidestick/control interface 42 in the side to side (C-C) direction, which is aligned with the plunger axis, can be measured by the force gauge 54 by threading the threaded end 58 of the plunger 56 into the threaded receptacle 28 of the second point of attachment 26 and pulling and pushing on the sidestick/control interface 42 in a Date Recue/Date Recieved 2022-11-23 side to side (C-C) direction using the force gauge 54 and such that pressure is exerted on the sidestick by movement of the force gauge 54. Movement of the sidestick/control interface 42 in a side-to-side direction is typically limited to a maximum deflection of ab0ut20 degrees in eitherdirection.
[0038] Referring back to Figure 3B, the force feedback of the sidestick/contd interface 42 in the back and forth (B-B) direction can be measured by the force gauge 54 by threading the threaded end 58 of the plunger 56 into the threaded receptacle 28 of the first point of attachment 24 and pulling and pushing on the sidestick/control interface 42 in a back and forth (B-B) direction using the force gauge 54. Movement of the sidestick/control interface 42 in a back-and-forth direction is typically limited to a maximum deflection of about 18 degrees in either direction.
[0039] Referring now to Figure 4, a second embodiment of an adaptor 60 will be described. The adaptor 60 comprises a housing 62 illustratively comprised of two complementary plastic parts or halves 64, 66. The first complementary half 64 and the second complementary half 66 may be assembled together using a plurality of fasteners 68. In a particular embodiment the fasteners each comprises a bolt 70 each of which is inserted through a respective bolt receiving bore 72 in a first of the complementary halves 64 and threaded into a respective one of a plurality of threaded inserts (not shown) in a second one of the two complementary halves 64, 66. The two complementary halves 64, 66 are securable about the sidestick/control interface 42, which is held snugly therebetween for movement therewith.
[0040] Stil I referring to Figure 4, the housing 62 furthercomprises a first point of attachment 74 illustratively comprising a threaded rod 76. A force gauge 78 comprising a gauge handle 80 may be secured to the adaptor 60 via the rod 76.
The force gauge 78 further comprises a sensor package 82 comprising one or more sensors (not shown)such as a load cell or the like which measure forces arising between the gauge handle 80 and the first point of attachment 74. An Date Recue/Date Recieved 2022-11-23 exemplary embodiment of a suitable load cell is a six (6) degree of freedom force-torque sensor which comprises strain gauges able to measure force along 3 orthogonal axes and produced by JR3 Multi-Axis Load Cell Systems.
Illustratively, the sensor package 82 measures both axial forces and torque forces vis-à-vis axis A 84 of the point of attachment 74. The elongate gauge handle 80 is illustratively secured to the sensor package 82 such thatthe gauge handle axis B is at right angles to the axis A.
[0041] Still referring to Figure 4, in operation with the force gauge 78 secured to the housing 62 via the pointof attachment74 and the threaded rod 76, movement by a user of the gauge handle 80 in either a back and forth or side-to-side direction imparts measurable forces on the sidestick/control interface 42 in respectively the back and forth or side-to-side directions. The sensor package 82 reads these imparted forces as axial 86 or torque 88 forces, which can be collected and analysed in order to calibrate the sidestick/control interface 42.
[0042] Referring now to Figure 5 in addition to Figure 4, output data 90 of a force measurement versus angle from upright of a control column in a back and front (fore and aft) movement is shown. Additionally, reference data 92 may also be provided.
[0043] Referring now to Figure 6, an assembly 92 for measuring the feedback force of a stab trim is disclosed. The assembly 92 comprises a load cell 94 for measuring the torque between an elongate shaft 96 comprising a shaft axis A
and a handle 98 arranged radially to the shaft axis A. The 5haft96 is mounted to the load cell 94 by a disk-shaped bracket 100 and a plurality of fasteners such as bolts 102 or the like. A conductive wire 104 can be provided to interconnect the electronics (not shown ) of the load cell 94 with an external measuring device (also not shown), such as a multi-meter or the like, and via which measured torque values can be read.
[0044] Referring now to Figure 7, the 5haft96 is i ntercon n ectable with a stab trim Date Recue/Date Recieved 2022-11-23 106, which comprises a stab trim aperture 108 into which the shaft 96 can be inserted. In this regard, the aperture 108 and the shaft 96 are complementary in shape such that when inserted, the shaft 96 rotates with the stab trim 106.
Illustratively, the shaft 96 is manufactured from a square rod and comprises a square cross-section.
[0045] Referring to Figures8A through 8F in addition to Figure 6, the bracket is sized to accord with the load cell 94 and comprises a shaft receiving aperture 110 for receiving the shaft 96 as well as a plurality of bores 112 via which the bolts 102 can be inserted. The shaft receiving aperture 110 is illustratively sized and shaped to acceptthe squareshaft96 in a friction fitand for rotation therewith.
An embossment 114 is provided around the shaft receiving aperture 110 to ensure that, when the assembly 92 is mounted to a stab trim 106, a minimum spacing is maintained to ensure that the assembly 92 is only in contact with the stab trim via shaft 96.
[0046] With reference to Figure 8F, in a particularembodiment a designation of the aircraft 116 for which the stab trim adaptor bracket 98 is intended can be provided.
[0047] Referring back to Figure 6 and Figure 7, in operation, the force feedback of the stab trim 106 can be measured by interconnecting the load cell 94 with a measuring device, inserting the shaft 96 of the assembly 92 into the stab trim aperture 108 and moving the handle 98 while collecting readings via the measurement device.
[0048] Referring now to Figure 9A and Figure 9B, an adaptor 118 in accordance with a third illustrative embodiment will now be described. The adaptor 118 comprises an adaptor body 120 comprising a foot pedal/control interface receiving recess 122. A point of attachment 124 is provided for attaching the plungerof a force gauge (both not shown). Illustratively the point of attachment 124 comprises an in nersu rface (notshown)threaded to receive a threaded end Date Recue/Date Recieved 2022-11-23 of the plunger.
[0049] Referring now to Figure 10, a force gauge 126 comprising a plunger 128 is secured to the adaptor 118 by threading the end of the plunger 128 into the point of attachment 124. Once assembled, the foot pedal receiving recess 122 is placed over and pressed against a pedal/control interface 130 being tested (illustratively a rudder pedal in an aircraft simulator). The measured result is read off the display 132 of the force gauge 126.
[0050]Although the present invention has been described herein above by way of specific embodiments thereof, it can be modified, without departi ng from the spirit and nature of the subject invention as defined in the appended claims.
Date Recue/Date Recieved 2022-11-23
DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS
[0031 ] Referring now to Figure 1A, a first embodiment of an adaptor, generally referred to using the reference numeral 10, will be described. The adaptor 10 comprises a housing 12 illustratively comprised of two complementary plastic parts or halves 14, 16. The first complementary half 14 and the second complementary half 16 may be assembled together using a plu rality of fasteners 18. In a particular embodiment each of the fasteners 18 comprises a bolt 20 inserted through a respective bolt receiving bore 22 in a first of the complementary halves 14, 16 and threaded into a respective one of a plurality of threaded inserts (not shown) in a second one of the two complementary halves 14, 16.
[0032]Still referring to Figure 1A, the housing 12 furthercomprises a first point of attachment 24 and a second pointof attachment26. Each poi ntof attachment 24, 26 illustratively comprises a threaded receptacle 28.
Date Recue/Date Recieved 2022-11-23 [0033]Referring now to Figure 2 in addition to Figure 1A, each of the complementary halves 14, 16 comprises an outer shell 30 manufactured from a rigid material such as hard plastic or the like, and a liner 32 manufactured from a flexible material such as a soft plastic or the like. The in nersu rface 34 of each of the outershells 30 is formed to receive the 1iner32 in a snug fit and such that the liner 32 is held snugly against the inner surface 34. In a particular embodiment an adhesive (not shown)may be used to secure the 1iner32 to a corresponding one of the outershells 30 orthe liner 32 and a corresponding one of the outer shells 30 may be manufactured together as a unitary piece.
[0034] Still referring to Figure 2 in addition to Figure 1A, the liner 32 is formed such that when the complementary halves 14, 16 are assembled together by threading for each one of the fasteners 18 the bolt 20 into the bore 22 via a washer 36 and a threaded insert 38, a sidestick, or control interface, receiving space 40 is defined which is shaped to snugly receive a sidestick/control interface 42 such that the sidestick/control interface 42 is held securely within the sidestick receiving space 40 by the complementary halves 14, 16. In this regard, the I iner32 of each of the complementary halves 14, 16 includesfeatures such as a molded surface 46 or the like which is complementary to the shape of the sidestick/control interface 42, and which ensures thateach time the adaptor is assembled about the sidestick/control interface 42, the positioning of the adaptor 10 on the sidestick/control interface 42 is consistently the same.
Additionally, the complementary halves 14, 16 may furthercomprise apertures 48 or the like allowing control buttons 50 and the like on the sidestick/control interface 42 to be accessed.
[0035] Still referring to Figu re 2, as known in the art the sidestick/control interface 42 is moveable from a central axis A in both a back-and-forth (B-B) direction which for example controls the pitch of an aircraft (not shown) and a side-to-side (C-C) direction which for example controls the roll of the aircraft. The first point of attach ment 24 and second point of attachment 26 are positioned on the outer Date Recue/Date Recieved 2022-11-23 shell 30 of the housing 12 such thatwhen the complementary halves 14, 16 are assembled about the sidestick/control interface 42, the first point of attachment 24 is aligned with the back-and-forth (B-B) direction, and the second point of attachment 26 is aligned with the side-to-side (S-S) direction, the second point of attachment 26 being at right angles to the orientation of the first point of attach ment24. Additionally,the first pointof attachment 24 and the second point of attachment 26 lie in the same plane, which is substantially normal to the axis A of the sidestick/control interface 42. In a particular embodiment, an accelerometer (not shown)can for example be embedded in the outer shell 30 or the like. An exemplary embodiment of an accelerometer comprises a Ph idgetSpatial 3/3/3 Precision accelerometer/magnetometer/gyroscope.
[0036] Referring now to Figure 3A and Figure 3B in addition to Figure 2, as discussed above each of the first point of attachment 24 and the second point of attachment 26 comprises the threaded receptacle 28 (which illustratively comprises a threaded insert 52). In order to measure the force feedback, the sidestick/control interface 42 in the back and forth (B-B) direction or the side-to-side (C-C) direction, once the bracket 10 has been assembled to the sidestick/control interface 42, a force gauge 54 comprising a plunger 56 may be attached to the bracket 10 by threading a threaded end 58 of the plu nger 56 into the threaded receptacle 28 of a respective one of the first point of attachment 24 and the second point of attachment 26. As known in the art, the plunger 56 moves back and forth along a plunger axis. During measurement of the force feedback, the angle of the sidestick/control interface 42 may be measured, for example by reading an outputof an accelerometer or by reading the angle from a simulator output.
[0037] Referring still to Figure 3A, the force feedback of the sidestick/control interface 42 in the side to side (C-C) direction, which is aligned with the plunger axis, can be measured by the force gauge 54 by threading the threaded end 58 of the plunger 56 into the threaded receptacle 28 of the second point of attachment 26 and pulling and pushing on the sidestick/control interface 42 in a Date Recue/Date Recieved 2022-11-23 side to side (C-C) direction using the force gauge 54 and such that pressure is exerted on the sidestick by movement of the force gauge 54. Movement of the sidestick/control interface 42 in a side-to-side direction is typically limited to a maximum deflection of ab0ut20 degrees in eitherdirection.
[0038] Referring back to Figure 3B, the force feedback of the sidestick/contd interface 42 in the back and forth (B-B) direction can be measured by the force gauge 54 by threading the threaded end 58 of the plunger 56 into the threaded receptacle 28 of the first point of attachment 24 and pulling and pushing on the sidestick/control interface 42 in a back and forth (B-B) direction using the force gauge 54. Movement of the sidestick/control interface 42 in a back-and-forth direction is typically limited to a maximum deflection of about 18 degrees in either direction.
[0039] Referring now to Figure 4, a second embodiment of an adaptor 60 will be described. The adaptor 60 comprises a housing 62 illustratively comprised of two complementary plastic parts or halves 64, 66. The first complementary half 64 and the second complementary half 66 may be assembled together using a plurality of fasteners 68. In a particular embodiment the fasteners each comprises a bolt 70 each of which is inserted through a respective bolt receiving bore 72 in a first of the complementary halves 64 and threaded into a respective one of a plurality of threaded inserts (not shown) in a second one of the two complementary halves 64, 66. The two complementary halves 64, 66 are securable about the sidestick/control interface 42, which is held snugly therebetween for movement therewith.
[0040] Stil I referring to Figure 4, the housing 62 furthercomprises a first point of attachment 74 illustratively comprising a threaded rod 76. A force gauge 78 comprising a gauge handle 80 may be secured to the adaptor 60 via the rod 76.
The force gauge 78 further comprises a sensor package 82 comprising one or more sensors (not shown)such as a load cell or the like which measure forces arising between the gauge handle 80 and the first point of attachment 74. An Date Recue/Date Recieved 2022-11-23 exemplary embodiment of a suitable load cell is a six (6) degree of freedom force-torque sensor which comprises strain gauges able to measure force along 3 orthogonal axes and produced by JR3 Multi-Axis Load Cell Systems.
Illustratively, the sensor package 82 measures both axial forces and torque forces vis-à-vis axis A 84 of the point of attachment 74. The elongate gauge handle 80 is illustratively secured to the sensor package 82 such thatthe gauge handle axis B is at right angles to the axis A.
[0041] Still referring to Figure 4, in operation with the force gauge 78 secured to the housing 62 via the pointof attachment74 and the threaded rod 76, movement by a user of the gauge handle 80 in either a back and forth or side-to-side direction imparts measurable forces on the sidestick/control interface 42 in respectively the back and forth or side-to-side directions. The sensor package 82 reads these imparted forces as axial 86 or torque 88 forces, which can be collected and analysed in order to calibrate the sidestick/control interface 42.
[0042] Referring now to Figure 5 in addition to Figure 4, output data 90 of a force measurement versus angle from upright of a control column in a back and front (fore and aft) movement is shown. Additionally, reference data 92 may also be provided.
[0043] Referring now to Figure 6, an assembly 92 for measuring the feedback force of a stab trim is disclosed. The assembly 92 comprises a load cell 94 for measuring the torque between an elongate shaft 96 comprising a shaft axis A
and a handle 98 arranged radially to the shaft axis A. The 5haft96 is mounted to the load cell 94 by a disk-shaped bracket 100 and a plurality of fasteners such as bolts 102 or the like. A conductive wire 104 can be provided to interconnect the electronics (not shown ) of the load cell 94 with an external measuring device (also not shown), such as a multi-meter or the like, and via which measured torque values can be read.
[0044] Referring now to Figure 7, the 5haft96 is i ntercon n ectable with a stab trim Date Recue/Date Recieved 2022-11-23 106, which comprises a stab trim aperture 108 into which the shaft 96 can be inserted. In this regard, the aperture 108 and the shaft 96 are complementary in shape such that when inserted, the shaft 96 rotates with the stab trim 106.
Illustratively, the shaft 96 is manufactured from a square rod and comprises a square cross-section.
[0045] Referring to Figures8A through 8F in addition to Figure 6, the bracket is sized to accord with the load cell 94 and comprises a shaft receiving aperture 110 for receiving the shaft 96 as well as a plurality of bores 112 via which the bolts 102 can be inserted. The shaft receiving aperture 110 is illustratively sized and shaped to acceptthe squareshaft96 in a friction fitand for rotation therewith.
An embossment 114 is provided around the shaft receiving aperture 110 to ensure that, when the assembly 92 is mounted to a stab trim 106, a minimum spacing is maintained to ensure that the assembly 92 is only in contact with the stab trim via shaft 96.
[0046] With reference to Figure 8F, in a particularembodiment a designation of the aircraft 116 for which the stab trim adaptor bracket 98 is intended can be provided.
[0047] Referring back to Figure 6 and Figure 7, in operation, the force feedback of the stab trim 106 can be measured by interconnecting the load cell 94 with a measuring device, inserting the shaft 96 of the assembly 92 into the stab trim aperture 108 and moving the handle 98 while collecting readings via the measurement device.
[0048] Referring now to Figure 9A and Figure 9B, an adaptor 118 in accordance with a third illustrative embodiment will now be described. The adaptor 118 comprises an adaptor body 120 comprising a foot pedal/control interface receiving recess 122. A point of attachment 124 is provided for attaching the plungerof a force gauge (both not shown). Illustratively the point of attachment 124 comprises an in nersu rface (notshown)threaded to receive a threaded end Date Recue/Date Recieved 2022-11-23 of the plunger.
[0049] Referring now to Figure 10, a force gauge 126 comprising a plunger 128 is secured to the adaptor 118 by threading the end of the plunger 128 into the point of attachment 124. Once assembled, the foot pedal receiving recess 122 is placed over and pressed against a pedal/control interface 130 being tested (illustratively a rudder pedal in an aircraft simulator). The measured result is read off the display 132 of the force gauge 126.
[0050]Although the present invention has been described herein above by way of specific embodiments thereof, it can be modified, without departi ng from the spirit and nature of the subject invention as defined in the appended claims.
Date Recue/Date Recieved 2022-11-23
Claims (6)
1. An assembly for measuring a force feedback of a stab trim in a flight simulator or aircraft, the stab trim comprising a trim wheel comprising a shaft receiving aperture arranged along an axis of the trim wheel, the assembly comprising:
an elongate shaftconfigu red fori nsertion intoth e apertu re and comprising a shaft axis;
a handle arranged substantially radially to the shaft axis; and a load cell interconnecting the shaft and the handle wherein the load cell is configured formeasuring a torque between the handle and the shaft.
an elongate shaftconfigu red fori nsertion intoth e apertu re and comprising a shaft axis;
a handle arranged substantially radially to the shaft axis; and a load cell interconnecting the shaft and the handle wherein the load cell is configured formeasuring a torque between the handle and the shaft.
2. The assembly of Claim 1, further comprising a bracket for securing the shaftto the load cell.
3. The assembly of Claim 2, wherein the bracket is disk shaped and comprises a second shaft receiving aperture at a center thereof for receiving the shaft, and the aperture is shaped to receive the shaft in a friction fit for rotation therewith.
4. The assembly of Claim 3, wherein the shaftreceiving aperture is of square cross-section, the shaft is manufactured from a square rod and the second shaft receiving aperture is of square cross-section.
5. A method of testing a stab trim in a cockpit simulator or aircraft, the stab trim comprising a trim wheel comprising a shaft receiving aperture arranged along an axis thereof, comprising:
interconnecting a shaft to a handle wherein the shaft comprises a shaft axis and the handle is arranged substantially radially to the shaft axis;
inserting the shaft into the aperture;
operating the simulator; and Date Recue/Date Recieved 2022-11-23 measuring a torque between the handle and the shaft.
interconnecting a shaft to a handle wherein the shaft comprises a shaft axis and the handle is arranged substantially radially to the shaft axis;
inserting the shaft into the aperture;
operating the simulator; and Date Recue/Date Recieved 2022-11-23 measuring a torque between the handle and the shaft.
6. The method of testing a stab trim of Claim 5, wherein the measuring the torque between the handle and the shaft is performed using a load cell interconnecting the shaft and the handle.
Date Recue/Date Recieved 2022-11-23
Date Recue/Date Recieved 2022-11-23
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA3182352A CA3182352C (en) | 2021-03-30 | 2021-03-30 | Assembly and method for measuring force feedback |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA3182352A CA3182352C (en) | 2021-03-30 | 2021-03-30 | Assembly and method for measuring force feedback |
| CA3113686A CA3113686C (en) | 2021-03-30 | 2021-03-30 | Calibration adaptor bracket, apparatus and method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3113686A Division CA3113686C (en) | 2021-03-30 | 2021-03-30 | Calibration adaptor bracket, apparatus and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA3182352A1 true CA3182352A1 (en) | 2021-06-21 |
| CA3182352C CA3182352C (en) | 2023-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3113686A Active CA3113686C (en) | 2021-03-30 | 2021-03-30 | Calibration adaptor bracket, apparatus and method |
| CA3182352A Active CA3182352C (en) | 2021-03-30 | 2021-03-30 | Assembly and method for measuring force feedback |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3113686A Active CA3113686C (en) | 2021-03-30 | 2021-03-30 | Calibration adaptor bracket, apparatus and method |
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| Country | Link |
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| CA (2) | CA3113686C (en) |
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2021
- 2021-03-30 CA CA3113686A patent/CA3113686C/en active Active
- 2021-03-30 CA CA3182352A patent/CA3182352C/en active Active
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| Publication number | Publication date |
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| CA3113686A1 (en) | 2021-06-21 |
| CA3182352C (en) | 2023-10-10 |
| CA3113686C (en) | 2023-02-21 |
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