Control wheel force sensor device
阅读：567发布：2022-07-27
专利汇可以提供Control wheel force sensor device专利检索，专利查询，专利分析的服务。并且A control wheel force sensor device including a control element having spring members orthogonal to one another and each spring member mounting semiconductor strain gauges to provide signals corresponding to the flexure of the associated spring member. The control element has an end portion affixed interiorly to a base member carried by the control wheel, while an opposite free end portion of the control element provides an inner bearing surface operably positioned in a nutational bearing mounted in an inner hub portion on which the control wheel may be angularly and linearly positioned. In the nutational bearing, supporting means carrying a single ball or row of bearing balls is so arranged as to permit linear motion of the free end inner bearing surface portion of the control element in relation to the single ball or the bearing balls and a nutating motion of such free end inner bearing portion of the control element in relation to the ball or balls carried by the supporting means. Such linear and nutating motion of the free end inner bearing portion of the control element upon operation of the control wheel permits a corresponding flexure of the associated spring member of the control element by the control wheel in effecting control of an aircraft in pitch and roll sense. The strain gages on such orthogonal spring member may be connected in an electrical bridge circuit so as to differentially unbalance the bridge and provide an electrical output corresponding to the forces applied to the spring member in said pitch and roll senses to modify an automatic pilot control system.，下面是Control wheel force sensor device专利的具体信息内容。
1. For use in an aircraft steering system of a type including a control column mounted to move about a first axis, a steering means rotatably mounted in said column and movable about a second axis orthogonal to the first axis, an operator-operative control member having an outer hub portion connected thereto and coaxially arranged in relation to said steering means, a cylindrical race bearing means mounted betrween said inner and outer hub portions, stop means carried by one of said hub portions and arranged in cooperative relation to the other of said hub portions so as to permit movement of said outer hub portions relative to said inner hub portion in angular and linear senses on said cylindrical race bearing means and within limited ranges defined by said stop means, and said stop means drivingly connecting said outer hub portion to said innr hub portion upon said outer hub portion being positioned by said operatoroperative control member relative to said inner hub portion in excess of any of said limited ranges in any one of said senses; an improvement comprising a base member connected to said operator-operative control member, a flexible control element having one end portion secured to said base member and an opposite other end portion extending in an orthogonal relation to the second axis of said steering means, a nutational bearing means mounted in a side wall portion of the inner hub portion drivingly connected to said steering means, said outer hub portion and said cylindrical race bearing means having corresponding openings therein, the other end portion of the control element extending through said openings in the outer hub portion and said cylindrical race bearing means in said orthogonal relation to the second axis of said steering means and into said nutational bearing means, said nutational bearing means being arranged to receive the other end portion of the control element so as to permit a linear and a nutational movement of the other end portion of the control element in said nutational bearing means upon a movement being imparted to said outer hub portion relative to said inner hub portion, said relative movement being imparted to said outer hub portion in response to movement of said control member in said angular and linear senses and within said limited ranges so as to effect a flexure of the other end portion of the control element, and stress sensor means carried by the flexible control element and responsive to the sense of the flexure of the other end portion of the control element to provide electrical signals corresponding to the magnitude and sense of the movement of the control member in said angular and linear senses within said limited ranges.
2. The improvement defined by claim 1 in which the nutational bearing means includes a plurality of ball bearings, an outer race surface provided in said side wall portion, and the other end portion of the control element providing an inner race surface for said ball bearings, and the other end portion of the control element being movable linearly in relation to the ball bearings of the nutational bearing means so as to permit the nutation of the other end portion of the control element within the nutational bearing means and in relation to the ball bearings of saiD nutational bearing means in response to the magnitude and sense of the movement of the control member in said angular and linear senses within said limited ranges.
3. The improvement defined by claim 1 in which the nutational bearing means includes an inner bearing member having a semi-spherical bearing surface and an axial bore extending through the inner bearing member, the other end portion of the control element being positioned in slidable relation in the axial bore of the inner bearing member, an outer race provided in the side wall portion of the inner hub portion and having a semi-spherical socket corresponding in shape to the semi-spherical bearing surface of the inner bearing member, the inner bearing member being positioned in the socket of the outer race, and the other end portion of the control element being movable linearly in the axial bore of the inner bearing member so as to permit said other end portion of the control element to follow angular movement of the inner bearing member in the socket of the outer race with said nutational movement in said nutational bearing means in response to the magnitude and sense of the movement of the control member in said angular and linear senses within said limited ranges.
4. The improvement defined by claim 1 in which the control element includes a first spring section adapted to flex upon a force being exerted on the control element about one axis extending parallel to the first axis and being rigid about another axis extending parallel to the second axis, a second spring section, the second spring section adapted to flex upon a force being exerted on the control element about another axis extending parallel to the second axis and being rigid about an axis extending parallel to the first axis, and the stress sensor means includes stress sensor elements mounted on the spring sections and responsive to flexure of the associated spring section so as to provide the electrical signals corresponding to the forces exerted on the control element about said one axis and said other axis in response to the flexure of the other end portion of the control element by the force exerted on the control member in said angular and linear senses within said limited ranges.
5. The improvement defined by claim 1 in which the nutational bearing means includes a plurality of ball bearings, an outer race surface provided in said side wall portion, and the other end portion of the control element providing an inner race surface for said ball bearings, and the other end portion of the control element being movable linearly in relation to the ball bearings of the nutational bearing means so as to permit the nutation of the other end portion of the control element within the nutational bearing means and in relation to the ball bearings of said nutational bearing means in response to the magnitude and sense of the movement of the control member in said angular and linear senses within said limited ranges; and in which said control element includes a first spring section adapted to flex upon a force being exerted on the control element about one axis extending parallel to the first axis and being rigid about another axis extending parallel to the second axis, a second spring section, a rigid portion intermediate the first spring section and the second spring section to operatively connect the first and second spring sections, the second spring section adapted to flex upon a force being exerted on the control element about another axis extending parallel to the second axis and being rigid about an axis extending parallel to the first axis, and the stress sensor means includes stress sensor elements mounted on the spring sections and responsive to flexure of the associated spring section so as to provide the electrical signals corresponding to the forces exerted on the control element about said one axis and said other axis in response to the flexure of the other end portion of the control element by the force exerted on the control Member in said angular and linear senses within said limited ranges.
6. The improvement defined by claim 1 in which the nutational bearing means includes an inner bearing member having a semi-spherical bearing surface and an axial bore extending through the inner bearing member, the other end portion of the control element being positioned in slidable relation in the axial bore of the inner bearing member, an outer race provided in the side wall portion of the inner hub portion and having a semi-spherical socket corresponding in shape to the semi-spherical bearing surface of the inner bearing member, the inner bearing member being positioned in the socket of the outer race, and the other end portion of the control element being movable linearly in the axial bore of the inner bearing member so as to permit said other end portion of the control element to follow angular movement of the inner bearing member in the socket of the outer race with said nutational movement in said nutational bearing means in response to the magnitude and sense of the movement of the control member in said angular and linear senses within said limited ranges; and in which said control element includes a first spring section adapted to flex upon a force being exerted on the control element about one axis extending parallel to the first axis and being rigid about another axis extending parallel to the second axis, a second spring section, a rigid portion intermediate the first spring section and the second spring section to operatively connect the first and second spring sections, the second spring section adapted to flex upon a force being exerted on the control element about another axis extending parallel to the second axis and being rigid about an axis extending parallel to the first axis, and the stress sensor means includes stress sensor elements mounted on the spring sections and responsive to flexure of the associated spring section so as to provide the electrical signals corresponding to the forces exerted on the control element about said one axis and said other axis in response to the flexure of the other end portion of the control element by the force exerted on the control member in said angular and linear senses within said limited ranges.
7. The improvement defined by claim 1 in which said control element includes a first spring section adapted to flex upon a force being exerted on the control element about one axis extending parallel to the first axis and being rigid about another axis extending parallel to the second axis, a second spring section, a rigid portion intermediate the first spring section and the second spring section to operatively connect the first and second spring sections, the second spring section adapted to flex upon a force being exerted on the control element about another axis extending parallel to the second axis and being rigid about an axis extending parallel to the first axis, and the stress sensor means includes stress sensor elements mounted on the spring sections and responsive to flexure of the associated spring section so as to provide the electrical signals corresponding to the forces exerted on the control element about said one axis and said other axis in response to the flexure of the other end portion of the control element by the force exerted on the control member in said angular and linear senses within said limited ranges, a pair of electrical terminal panels mounted at opposite sides of the rigid portion of the control element, electrical conductors leading from the stress sensor elements to the terminal panels, an electrical connector block mounted on the base member, and other electrical conductors leading from the electrical terminal panels to the electrical connector block for connection into the aircraft steering system.
8. A force sensor comprising in combination, a base member, an operator-operative control member, the base member being affixed to the operator-operative control member, an inner hub portion coaxially arrangEd in relation to the control member, the control member being movably mounted in relation to the inner hub portion in angular and axial senses and within limited ranges, a flexible control element having one end portion secured to said base member and an opposite other end portion extending in an orthogonal relation to an axis of said inner hub portion, bearing means mounted in a side wall portion of said inner hub portion, the other end portion of the control element being mounted in said bearing means in such a manner as to permit linear movement and nutation of the other end portion of the control element in said bearing means upon flexure of said other end portion of the control element, the flexure of said other end portion of the control element, the flexure of said other end portion of the control element being effected upon a force being applied to said one end portion of the control element, the force being applied to said one end portion of the control element secured to said base member upon movement of the control member in angular and axial senses relative to said inner hub portion and within said limited ranges so as to effect a flexure of the other end portion of the control element, and stress sensor means carried by the flexible control element and responsive to the sense of the flexure of the other end portion of the control element to provide electrical signals corresponding to the magnitude and sense of the movement of the control member in said angular and linear senses within said limited ranges.
9. The force sensor defined by claim 8 in which the bearing means includes a plurality of ball bearings, an outer race surface provided in said side wall portion, and the other end portion of the control element providing an inner race surface for said ball bearings, and the other end portion of the control element being movable linearly in relation to the ball bearings of the bearing means so as to permit the nutation of the other end portion of the control element within the bearing means and in relation to the ball bearings of said bearing means in response to the magnitude and sense of the movement of the control member in said angular and linear senses within said limited ranges.
10. The force sensor defined by claim 8 in which the bearing means includes a mono-ball nutational bearing, an outer race surface for said mono-ball bearing provided in said side wall portion of the inner hub portion, said mono-ball bearing having an axial bore, the other end portion of the control element being slidably mounted in said axial bore and movable linearly in the mono-ball bearing of the bearing means so as to permit nutation of the other end portion of the control element within the bearing means upon angular movement of the mono-ball bearing on the outer race surface of said bearing means in response to the magnitude and sense of the movement of the control member in said angular and linear senses within said limited ranges.
11. The force sensor defined by claim 8 in which the bearing means includes an inner bearing member having a semi-spherical bearing surface and an axial bore extending through the inner bearing member, the other end portion of the control element being positioned in slidable relation in the axial bore of the inner bearing member, an outer race member mounted in the side wall portion of the inner hub portion and having a semi-spherical socket corresponding in shape to the semi-spherical bearing surface of the inner bearing member, the inner bearing member being positioned in slidable relation in the socket of the outer race member, and the other end portion of the control element being movable linearly in the axial bore of the inner bearing member so as to permit the nutation of the other end portion of the control element within the bearing means in response to the magnitude and sense of the movement of the control member in said angular and linear senses within said limited ranges.
12. The force sensor defined by claim 8 in wHich the control element includes a first spring section adapted to flex about a first axis upon the force being applied to the one end portion of the control element in response to the movement of the control member in said angular sense relative to said inner hub portion, and said first spring section being rigid about a second axis at right angles to the first axis, a second spring section adapted to flex about a third axis extending parallel to said second axis upon a force being applied to the one end portion of the control element in response to the movement of the control member in said axial sense relative to said inner hub portion, said second spring section being rigid about a fourth axis at right angles to said third axis and extending parallel to said first axis, and the stress sensor means includes stress sensor elements mounted on the first and second spring sections and responsive to flexure of the associated spring section so as to provide the electrical signals corresponding to the magnitude and sense of the movement of the control member in said angular and axial senses relative to said inner hub portion and within said limited ranges.
13. The force sensor defined by claim 12 in which said control element includes a rigid portion intermediate the first spring section and the second spring section to operatively connect the first and second spring sections; and each of the stress sensor elements includes a stress responsive variable resistance strain gage mounted on each spring section and responsive to flexure of the associated spring section to change electrical resistance upon tensile and compressive forces being applied thereto to provide electrical signals corresponding to the forces exerted on the control element about the first and third axes upon movement of the operator-operative control member selectively in said angular and axial senses relative to said inner hub portion and within said limited ranges.
14. The force sensor defined by claim 13 in which the bearing means includes a plurality of ball bearings, an outer race surface provided in said side wall portion, and the other end portion of the control element providing an inner race surface for said ball bearings, and the other end portion of the control element being movable linearly in relation to the ball bearings of the bearing means so as to permit the nutation of the other end portion of the control element within the bearing means and in relation to the ball bearings of said bearing means in response to the magnitude and sense of the movement of the control member in said angular and linear senses within said limited ranges.
15. The force sensor defined by claim 13 in which the bearing means includes an inner bearing member having a semi-spherical bearing surface and an axial bore extending through the inner bearing member, the other end portion of the control element being positioned in slidable relation in the axial bore of the inner bearing member, an outer race member mounted in the side wall portion of the inner hub portion and having a semi-spherical socket corresponding in shape to the semi-spherical bearing surface of the inner bearing member, the inner bearing member being positioned in slidable relation in the socket of the outer race member, and the other end portion of the control element being movable linearly in the axial bore of the inner bearing member so as to permit the nutation of the other end portion of the control element within the bearing means in response to the magnitude and sense of the movement of the control member in said angular and linear senses within said limited ranges.
16. The improvement defined by claim 13 including electrical terminal panel means mounted on the rigid portion of the control element intermediate the first and second spring sections, electrical conductors leading from the stress sensor elements mounted on the first and second spring sections to the terminal panel means, an electrical connector block mounted on the baSe member, and other electrical conductors leading from the electrical terminal panel means to the electrical connector block for connection into an electrical control system.
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