A nonlinear mechanism for a control system

Abstract

The present application provides a nonlinear mechanism for a control system, belonging to the field of mechanical design technology. In the nonlinear mechanism for a control system of the present invention, a first rocker arm and a second rocker arm are mounted on a bracket. The first rocker arm can swing about the first rocker arm mounting axis; the second rocker arm can swing about the second rocker arm mounting axis; the triangular rocker arm is hinged to the first rocker arm, the second rocker arm, and the second transmission rod, respectively; and one end of the first transmission rod is hinged to a hinge point of the first rocker arm. When the aircraft is in high-speed flight, the required rudder deflection angle is small, but a certain control stick displacement is still required, ensuring that the control system is not overly sensitive. At the same time, when the aircraft is in low-speed flight, the control stick displacement is large, and the rudder deflection angle is large, ensuring sufficient control performance.

Description

Technical Field

[0001] The present application belongs to the technical field of electric mechanism design, and in particular relates to a nonlinear mechanism for a control system. Background Art

[0002] Due to the large flight speed range of modern aircraft, the rudder deflection rate needs to be lower than the control rate within the initial stroke of the joystick deviating from the neutral position, and the rudder deflection rate gradually increases in the later stroke of the joystick deviation, so that the control system will not be too sensitive when the aircraft has good control performance at high-speed flight, and at the same time there will be sufficient rudder deflection angle when the aircraft has degraded control performance at low-speed flight.

[0003] Therefore, it is necessary to propose a nonlinear mechanism for the control system to solve the problem that the control system is too sensitive when the aircraft is flying at high speed, while ensuring that there is enough control surface deflection angle to achieve sufficient control performance when the aircraft is flying at low speed. Summary of the Invention

[0004] In order to solve the problem of excessive control sensitivity of the control system during high-speed flight, while ensuring sufficient controllable performance at low-speed flight, the present invention provides a nonlinear mechanism for the control system. The technical solution is as follows:

[0005] A nonlinear mechanism for a control system includes: a second transmission rod, a second rocker arm, a triangular rocker arm, a first rocker arm, a first transmission rod, and a bracket.

[0006] The first rocker arm and the second rocker arm are installed on the bracket, the first rocker arm can swing around the first rocker arm mounting axis; the second rocker arm can swing around the second rocker arm mounting axis; the triangular rocker arm is hinged to the first rocker arm, the second rocker arm and the second transmission rod respectively; one end of the first transmission rod is hinged to a hinge point of the first rocker arm.

[0007] The triangular rocker arm is provided with three mounting points distributed in a triangle, and the three mounting points are hinged to the first rocker arm, the second rocker arm and the second transmission rod respectively.

[0008] The other end of the first transmission rod is hinged to the driving control device and is used to transmit the control instructions of the driving rod to the nonlinear mechanism.

[0009] Among them, one end of the second transmission rod away from the triangular rocker arm is hinged to the mechanical input rocker arm of the booster, and the second rocker arm can transmit the operating instructions to the booster at the rear end through the second transmission rod.

[0010] Among them, when the steering column is in the neutral position, the nonlinear mechanism is in the neutral position. When the steering column deviates from the neutral position under the driver's operation, the nonlinear mechanism is driven to work through the first transmission rod, and the first transmission rod moves from the neutral position to one side. Under the action of the second rocker arm, the triangular rocker arm rotates, and the second transmission rod generates additional movement in the opposite direction of the movement of the second transmission rod.

[0011] Among them, when the steering column moves beyond the limit position under the driver's continued operation, under the action of the second rocker arm, the triangular rocker arm produces a rotation opposite to the previous rotation direction, and the second transmission rod produces additional movement in the same direction as the movement of the second transmission rod.

[0012] In the process of the joystick moving from the neutral position to the extreme position, the ratio of the output displacement of the nonlinear mechanism to the joystick manipulation displacement gradually increases.

[0013] Among them, the triangular rocker arm, the first rocker arm, the second rocker arm, the second transmission rod and the first transmission rod are all provided with mounting holes.

[0014] The triangular rocker arm is hinged to the first rocker arm, the second rocker arm and the second transmission rod respectively, and one end of the first transmission rod is hinged to a hinge point of the first rocker arm, both of which adopt the method of matching the mounting hole with the insert.

[0015] The insert is a screw or a bolt.

[0016] The present invention provides a nonlinear mechanism for a control system, comprising a first rocker arm and a second rocker arm mounted on a bracket. The first rocker arm can swing about the first rocker arm mounting axis; the second rocker arm can swing about the second rocker arm mounting axis; the triangular rocker arm is hinged to the first rocker arm, the second rocker arm, and the second transmission rod, respectively; and one end of the first transmission rod is hinged to a hinge point of the first rocker arm. When the aircraft is in high-speed flight, good maneuverability is achieved, while a certain control stick displacement is still required, ensuring that the control system is not overly sensitive. At the same time, when the aircraft is in low-speed flight, a large control stick displacement and a large control surface deflection angle are achieved, ensuring adequate maneuverability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a nonlinear mechanism for a control system provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the neutral position state of a nonlinear mechanism provided in an embodiment of the present application;

[0019] Figure 3 A schematic diagram of a nonlinear mechanism provided in an embodiment of the present application in an extreme position;

[0020] Figure 4A schematic diagram of the nonlinear mechanism provided in an embodiment of the present application in another extreme position;

[0021] Figure 5 This is a graph showing the input-output relationship of the nonlinear mechanism provided in an embodiment of the present application.

[0022] Among them, 1 is the second transmission rod, 2 is the second rocker arm, 3 is the triangular rocker arm, 4 is the first rocker arm, 5 is the first transmission rod, and 6 is the bracket. DETAILED DESCRIPTION

[0023] The present application is further described in detail below through specific implementation methods and drawings.

[0024] The present invention provides a nonlinear mechanism for a control system, see Figure 1 , including: a bracket 6, a first transmission rod 5, a first rocker arm 4, a triangular rocker arm 3, a second rocker arm 2 and a second transmission rod 1.

[0025] Wherein, the first rocker arm 4 and the second rocker arm 2 are both mounted on the bracket 6. The first rocker arm 4 can swing around the first rocker arm 4 mounting axis; the second rocker arm 2 can swing around the second rocker arm 2 mounting axis.

[0026] The three mounting points of the triangular rocker arm 3 are distributed in a triangle and are hinged to the first rocker arm 4, the second rocker arm 2 and the second transmission rod 1 respectively.

[0027] One end of the first transmission rod 5 is hinged to a hinge point of the first rocker arm 4, and the other end of the first transmission rod 5 is hinged to the driving control device. The first transmission rod 5 can transmit the control command of the driving rod to the nonlinear mechanism.

[0028] One end of the second transmission rod 1 away from the triangular rocker arm 3 is hinged to the mechanical input rocker arm of the booster, and the second rocker arm 2 transmits the control instruction to the booster at the rear end through the second transmission rod 1.

[0029] When the control stick is in the neutral position, the nonlinear mechanism is in the neutral position, such as Figure 2 As shown in the figure, when the driver manipulates the control stick to deviate from the neutral position, the nonlinear mechanism is driven by the first transmission rod 5, and the first transmission rod 5 moves from the neutral position to one side. Due to the action of the second rocker arm 2, the triangular rocker arm 3 is forced to rotate, and the second transmission rod 1 generates an additional movement in the opposite direction to the movement direction of the second transmission rod 1, which reduces the actual movement of the second transmission rod 1 and reduces the deflection rate of the rudder surface.

[0030] like Figure 3 and Figure 4As shown, when the driver continues to manipulate the control stick to move beyond the limit position, due to the action of the second rocker arm 2, the triangular rocker arm 3 is forced to rotate in the opposite direction to the previous rotation direction, and the second transmission rod 1 produces additional movement in the same direction as the movement of the second transmission rod 1, which increases the actual movement of the second transmission rod 1 and increases the deflection speed of the rudder surface.

[0031] In the process of steering the control stick from the neutral position to the extreme position, the ratio of the output displacement of the nonlinear mechanism to the steering stick displacement gradually increases, such as Figure 5 As shown in the figure (the first transmission rod stroke on the vertical axis is the input displacement of the nonlinear mechanism), this means that when the aircraft is flying at high speed and has good control performance, the required rudder deflection angle is small, but a certain control stick displacement is still required to ensure that the control system is not too sensitive. At the same time, when the aircraft is flying at low speed, the control stick displacement is large and the rudder deflection angle is large, ensuring sufficient control performance.

[0032] The above merely describes the embodiments of the present application, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of the invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Furthermore, any portions not described in detail herein are conventional techniques.

Claims

1. A nonlinear mechanism for a control system, characterized in that: include: A second transmission rod (1), a second rocker arm (2), a triangular rocker arm (3), a first rocker arm (4), a first transmission rod (5) and a bracket (6), The first rocker arm (4) and the second rocker arm (2) are mounted on a bracket (6); the first rocker arm (4) can swing around the mounting axis of the first rocker arm (4); the second rocker arm (2) can swing around the mounting axis of the second rocker arm (2); the triangular rocker arm (3) is hinged to the first rocker arm (4), the second rocker arm (2) and the second transmission rod (1) respectively; one end of the first transmission rod (5) is hinged to a hinge point of the first rocker arm (4); When the steering column is in a neutral position, the nonlinear mechanism is in a neutral position. When the steering column deviates from the neutral position under the control of the driver, the nonlinear mechanism is driven to work via the first transmission rod (5), and the first transmission rod (5) moves from the neutral position to one side. Under the action of the second rocker arm (2), the triangular rocker arm (3) rotates, and the second transmission rod (1) generates an additional movement in the opposite direction to the movement direction of the second transmission rod (1). When the steering rod moves beyond the limit position under the continued manipulation of the driver, the triangular rocker arm (3) generates a rotation opposite to the previous rotation direction under the action of the second rocker arm (2), and the second transmission rod (1) generates an additional movement in the same direction as the movement of the second transmission rod (1).

2. The nonlinear mechanism for a control system according to claim 1, wherein: The triangular rocker arm (3) is provided with three mounting points distributed in a triangular shape, and the three mounting points are respectively hinged to the first rocker arm (4), the second rocker arm (2) and the second transmission rod (1).

3. The nonlinear mechanism for a control system according to claim 1, wherein: The other end of the first transmission rod (5) is hinged to the driving control device and is used to transmit the control instructions of the driving rod to the nonlinear mechanism.

4. The nonlinear mechanism for a control system according to claim 1, wherein: One end of the second transmission rod (1) away from the triangular rocker arm (3) is hinged to the mechanical input rocker arm of the booster, and the second rocker arm (2) can transmit the operating instruction to the booster at the rear end through the second transmission rod (1).

5. The nonlinear mechanism for a control system according to claim 3, characterized in that: As the joystick moves from the neutral position to the extreme position, the ratio of the output displacement of the nonlinear mechanism to the joystick manipulation displacement gradually increases.

6. The nonlinear mechanism for a control system according to claim 1, wherein: The triangular rocker arm (3), the first rocker arm (4), the second rocker arm (2), the second transmission rod (1), and the first transmission rod (5) are all provided with mounting holes. The triangular rocker arm (3) is hinged to the first rocker arm (4), the second rocker arm (2) and the second transmission rod (1) respectively, and one end of the first transmission rod (5) is hinged to a hinge point of the first rocker arm (4), both of which adopt a mounting hole and an insert matching method.

7. The nonlinear mechanism for a control system according to claim 6, characterized in that: The insert is a screw or a bolt.

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