A control device, footstep step maneuvering mechanism and method

Abstract

The application provides a control device, a footstep step control mechanism and a method, the control device comprising a handle rod, a T-shaped sleeve, a spring component, a scale rod, a fixed pin, a ring washer, a ring base, a countersunk screw and an anti-skid sleeve, the footstep step control mechanism comprising a left driver footstep mechanism A, a right driver footstep mechanism B and a control device C. The control device and the footstep step control mechanism can be used to assist the driver to input a standard footstep step with a fixed amplitude, so as to reduce the risk of test flight and improve the efficiency of test flight.

Description

Technical Field

[0001] This application belongs to the field of helicopter flight quality testing technology, specifically relating to a control device, a foot pedal step control mechanism, and a method. Background Technology

[0002] With the continuous development of modern helicopter technology, helicopters, with their unique takeoff and landing methods and low-altitude operation capabilities, are increasingly being used in rescue, firefighting, transportation, tourism, and other fields. Handling ability, a metric used to measure the ability to change a helicopter's flight state, is one of the most important indicators of helicopter performance. Good handling ability allows a helicopter to quickly transition from one flight state to another. Therefore, scientifically and reasonably defining helicopter handling indicators has become a crucial aspect of helicopter flight quality testing.

[0003] According to the latest flight quality specifications, helicopter controllability is divided into three categories based on response amplitude: small amplitude, medium amplitude attitude agility, and large amplitude attitude change. Medium amplitude attitude agility and large amplitude attitude change both involve pedal step control (the pilot uses the pedals to control yaw). This action requires the pilot to complete a near-standard step input within 0.2 seconds and then hold it for 4–6 seconds. Figure 1 As shown. Because helicopter pedals lack a so-called "force-sensing system," test pilots often cannot perceive the amplitude of pedal input when making step inputs, which leads to the following problems:

[0004] Step control often results in significant overshoot, failing to meet standard pedal input requirements, such as... Figure 2 As shown; if the pedal input amplitude is too small, the helicopter will not respond; if the pedal input amplitude is too large, it may cause excessive attitude changes, oscillation divergence, and structural damage to the tail rotor / tail boom caused by large shear forces, especially near the ground.

[0005] Therefore, in flight testing, moderate-amplitude attitude agility and large-amplitude attitude changes near the ground are defined as high-risk subjects. Based on this background, a control device, a foot-operated step control mechanism, and a method are designed to assist the pilot in making standard foot-operated step inputs with fixed amplitudes, thereby reducing flight test risks and improving flight test efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide a control device, a foot pedal step control mechanism, and a method. This control device and foot pedal step control mechanism can assist test pilots in inputting standard foot pedal steps with a fixed amplitude, thereby reducing test flight risks, improving test flight efficiency, and reducing the number of test flights.

[0007] In a first aspect, this application provides a control device, the control device comprising:

[0008] T-sleeve, including a threaded hole for a retaining pin;

[0009] An annular base is connected to one end of the T-shaped sleeve; wherein the annular base includes a circular hole;

[0010] A ruler rod, one end of which is disposed on the T-shaped sleeve, and the other end of which can pass through the circular hole;

[0011] An elastic component is disposed inside the T-shaped sleeve. One end of the elastic component is fixedly connected to the bottom end face inside the T-shaped sleeve, and the other end of the elastic component is in contact with one end of the scale rod.

[0012] A retaining pin is used to pass through the threaded hole of the retaining pin and the elastic component to compress and limit the elastic component.

[0013] Preferably, the T-sleeve comprises:

[0014] The T-shaped sleeve cavity includes an opening for accommodating the elastic component and the scale rod; wherein the annular base is disposed in the opening.

[0015] Preferably, the control device further includes:

[0016] The handle rod is connected to the T-shaped sleeve.

[0017] Preferably, the control device further includes:

[0018] An annular washer is disposed between the annular base and the T-shaped sleeve.

[0019] Preferably, the scale rod is provided with uniform graduations.

[0020] Secondly, this application also provides a foot pedal step control mechanism, the control mechanism including the control device as described above; the control mechanism further includes: a left driver foot pedal mechanism and a right driver foot pedal mechanism;

[0021] The left and right driver pedal mechanisms are linked in the same direction; the control device abuts against the left or right driver pedal mechanism.

[0022] Preferably, the left-side driver's foot pedal mechanism includes:

[0023] First left foot push;

[0024] The first right pedal is linked in the opposite direction to the first left pedal.

[0025] The right-side driver's foot pedal mechanism includes:

[0026] Second left foot push;

[0027] The second right pedal is linked in the opposite direction to the second left pedal.

[0028] The first left pedal and the second left pedal are linked in the same direction, and the first right pedal and the second right pedal are linked in the same direction; the control device abuts against any one of the first left pedal, the first right pedal, the second left pedal, and the second right pedal.

[0029] Thirdly, this application also provides a foot pedal step control method, which is applied to the control mechanism as described above;

[0030] The method includes:

[0031] The first left foot pedal acquires a step input;

[0032] The first left foot pedal moves in a first direction based on the step input, the second right foot pedal moves in a second direction, the scale rod retracts into the T-shaped sleeve cavity, the second right foot pedal contacts the annular base, and the annular base restricts the second right foot pedal from moving in the second direction, thus completing the step operation of the first left foot.

[0033] The other end of the ruler bar abuts against the second right foot pedal; the first direction is opposite to the second direction.

[0034] This application has the following technical effects:

[0035] To address the risks associated with controlling the amplitude of helicopter pedal step inputs, which can lead to excessive attitude changes, oscillations, and structural damage due to significant shear forces on the tail rotor / tail boom, a control device, pedal step control mechanism, and method are designed to assist the pilot in making standard pedal step inputs with fixed amplitudes. The core of this method lies in utilizing the elasticity of a flexible component to control the extension length of a scale rod, and using a fixing pin to maintain this extension length. By using this control device and pedal mechanism in conjunction, the pilot can complete pedal step inputs with fixed amplitudes, thereby reducing flight test risks and improving flight test efficiency. Attached Figure Description

[0036] Figure 1 A schematic diagram of a standard foot pedal step provided for this application;

[0037] Figure 2 A schematic diagram of a foot pedal step jump with overshoot provided for this application;

[0038] Figure 3 A schematic diagram of the control device provided in the embodiments of this application;

[0039] Figure 4A schematic diagram of the handle lever provided in the embodiments of this application.

[0040] Figure 5 A schematic diagram of a T-sleeve provided in an embodiment of this application;

[0041] Figure 6 A cross-sectional view AA of the T-sleeve provided in the embodiments of this application;

[0042] Figure 7 A schematic diagram of the scale rod provided in the embodiments of this application;

[0043] Figure 8 A schematic diagram of the annular base provided in the embodiments of this application;

[0044] Figure 9 A cross-sectional view AA of the annular base provided in an embodiment of this application;

[0045] Figure 10 A schematic diagram of the anti-slip sleeve provided in an embodiment of this application;

[0046] Figure 11 This is a cross-sectional view AA of the anti-slip sleeve provided in an embodiment of this application;

[0047] Figure 12 This is a schematic diagram of the foot pedal step control mechanism provided in the embodiments of this application. Detailed Implementation

[0048] This application discloses a control device and a step-by-step control mechanism. The control device includes: a handle lever 1, a T-sleeve 2, a spring component 3, a scale lever 4, a fixing pin 5, an annular washer 6, an annular base 7, a countersunk screw 8, and an anti-slip sleeve 9. The step-by-step control mechanism includes: a left-side pilot step-by-step mechanism A, a right-side pilot step-by-step mechanism B, and a control device C. This control device and step-by-step control mechanism can assist the pilot in making standard step-by-step inputs with fixed amplitude, thereby reducing flight test risks and improving flight test efficiency.

[0049] This application provides a control device, a foot-operated step control mechanism, and a method, such as... Figures 3 to 12 This is a schematic diagram of the control device and foot pedal step control mechanism and its sub-components according to an embodiment of this application.

[0050] Example 1: The control device includes:

[0051] Handle lever 1

[0052] like Figure 4 As shown, the handle rod 1 is basically a cylindrical structure with a handle, and its components include the handle rod handle 101 and the handle rod sleeve 102.

[0053] The 101 handle is designed with streamlined shape and ergonomic principles in mind. First, it is based on the hand dimensions specified in the Chinese military standard GJB4856-2003 "Anthropometric Dimensions of Chinese Male Pilots," including the length of the back of the hand, the length of the thumb, the length of the middle finger, and the width of the thumb joint, to conform to the hand shape of Chinese pilots. Second, the entire body uses three rounded tangent transitions, and the surface of the handle is treated with a frosted finish and non-slip rubber material. This reduces the weight of the handle, improves grip comfort, and prevents slippage caused by sweaty hands. Additionally, a threaded hole is provided at one end.

[0054] The handle sleeve 102 adopts a cylindrical structure and has external threads at both ends, which reduces the weight of the handle sleeve 102 and alleviates the fatigue caused by the pilot holding the stick for a long time.

[0055] In view of the characteristics of large airframe vibration and narrow cockpit of helicopter, the handle 101 and the handle sleeve 102 are connected by threads to form the handle 1. The advantage of this is that it can effectively avoid the problem of loose connection caused by airframe vibration and also has the advantage of easy disassembly.

[0056] T-sleeve 2

[0057] like Figure 5 and Figure 6 As shown, the T-type sleeve 2 has a T-shaped cylindrical structure, and its components include a countersunk threaded hole 201, a fixing pin threaded hole 202, a T-type sleeve threaded hole 203, a T-type sleeve cavity 204, and a T-type sleeve base 205.

[0058] All components of the T-sleeve 2 are integral structures made of copper.

[0059] The advantage of the countersunk threaded hole 201 is that the entire countersunk screw 8 can be completely submerged in the threaded hole structure composed of the countersunk threaded hole 201 and the annular base threaded hole 701, thus avoiding interference between the exposed parts of the countersunk screw 8 and other parts.

[0060] The T-shaped sleeve 203 is threadedly connected to the handle sleeve 102, thereby connecting the T-shaped sleeve 2 to the handle 1. Its advantage is that it can effectively avoid the problem of loose connection caused by machine vibration and facilitate disassembly.

[0061] The T-shaped sleeve cavity 204 is used to accommodate the elastic component 3 and the scale rod 4.

[0062] Elastic component 3

[0063] As shown in the figure, the elastic component structure is a compression spring with a certain stiffness. Its stiffness requirement must meet the following: under the action of the scale rod 4's own weight, the compression spring must not deform, so as to avoid affecting the length of the scale rod 4 extending out of the annular base 7.

[0064] Ruler rod 4

[0065] like Figure 7 As shown, the scale rod 4 has a T-shaped cylindrical structure, and its components include a scale rod base 401, a scale rod chamfered end face 402, and a scale rod groove 403.

[0066] All components of the ruler rod 4 are integral structures made of copper.

[0067] The diameter of the scale rod base 401 is slightly smaller than the diameter of the T-shaped sleeve cavity 204. This is to facilitate the insertion of the scale rod 4 into the T-shaped sleeve cavity 204, avoid affecting the reciprocating motion of the scale rod 4, and increase the coaxiality of the scale rod 4 and the T-shaped sleeve cavity 204.

[0068] The advantage of the chamfered end face 402 structure of the ruler rod is that it is easy to screw the anti-slip sleeve 9 into one end of the chamfered end face of the ruler rod 4.

[0069] There are seven sets of ruler rod grooves 403. The distance between the chamfered end face 402 of the ruler rod and the first set of ruler rod grooves 403 is 1cm, and the distance between the remaining six sets of ruler rod grooves 403 is 1cm. The function of the ruler rod grooves 403 is to show the length of the ruler rod 4 extending out of the annular base 7.

[0070] Fixed pin 5

[0071] As shown in the figure, the fixing pin 5 has a cylindrical structure with external threads on its outer surface, and its material is copper.

[0072] The fixing pin 5 and the fixing pin threaded hole 202 are connected by a thread. The use of a threaded connection can avoid the problem of the fixing pin 5 falling off due to helicopter vibration.

[0073] The function of the fixing pin 5 is to compress and limit the elastic component 3 after passing through the threaded hole 202 of the fixing pin.

[0074] 6 ring washers

[0075] As shown in the figure, the annular washer 6 has an annular structure and is made of non-slip rubber, which can effectively buffer and absorb shock.

[0076] The annular washer 6 is located between the annular base 7 and the T-sleeve 2. The function of this washer is to distribute the pressure generated during the threaded connection and prevent plastic deformation at the threaded connection. At the same time, the anti-slip rubber material can reduce the loosening of the connection between the annular base 7, the annular washer 6, and the T-sleeve 2 caused by helicopter vibration.

[0077] Annular base 7

[0078] like Figure 8 and Figure 9 As shown, the annular base 7 has an annular structure, and its components include an annular base threaded hole 701.

[0079] All components of the annular base 7 are integral structures made of copper.

[0080] The function of the threaded hole 701 in the annular base is to connect the annular base 7 and the T-sleeve 2.

[0081] Countersunk screws 8

[0082] The countersunk screw 8 has a T-shaped structure and is made of copper.

[0083] The countersunk screw 8, the countersunk threaded hole 201, and the annular base threaded hole 701 are set concentrically. Then, the T-sleeve 2, the annular washer 6, and the annular base 7 are fixedly connected by the countersunk screw 8 using a threaded connection.

[0084] Anti-slip sleeve 9

[0085] like Figure 10 and Figure 11 As shown, the anti-slip sleeve 9 has a cylindrical trapezoidal structure, and its components include the anti-slip sleeve inner cavity 901 and the anti-slip groove 902.

[0086] The anti-slip sleeve consists of nine integral components, all made of anti-slip rubber, which has the advantages of good elasticity, anti-slip properties, and wear resistance.

[0087] The advantage of the anti-slip sleeve inner cavity 901 structure is that a cavity is opened from the upper end face of the anti-slip sleeve 9 to place the chamfered end face 402 of the ruler rod, which increases the contact area between the anti-slip sleeve 9 and the ruler rod 4, making the two parts firmly connected. At the same time, the selected anti-slip rubber material plays a role in reducing vibration to a certain extent.

[0088] The advantage of the anti-slip groove 902 structure is that by adding three annular grooves to the bottom surface of the anti-slip sleeve 9, the anti-slip effect is further enhanced.

[0089] The connection relationships of each component are as follows:

[0090] The handle rod 1 and the T-shaped sleeve 2 are concentrically arranged and connected to each other by a threaded connection.

[0091] The elastic component 3 is placed inside the T-shaped sleeve cavity 204. One end of the elastic component 3 is fixed to the bottom end face of the T-shaped sleeve cavity 204 by welding, and the other end of the elastic component 3 is fixed to one end of the scale rod 4 by welding.

[0092] Furthermore, the T-shaped sleeve 2, the annular washer 6, and the annular base 7 are arranged concentrically, so that the scale rod 4 passes through the corresponding circular holes in the annular washer 6 and the annular base 7.

[0093] Furthermore, the countersunk screw 8, the countersunk threaded hole 201, and the annular base threaded hole 701 are concentrically arranged, and the countersunk screw 8 is inserted into the corresponding threaded holes of the countersunk threaded hole 201 and the annular base threaded hole 701 by means of threaded connection, thereby connecting and fixing the T-shaped sleeve 2, the annular washer 6, and the annular base 7 together.

[0094] Further, screw the anti-slip sleeve 9 into one end of the chamfered end face 402 of the ruler rod.

[0095] Furthermore, by applying external force to the anti-slip sleeve 9, the elastic component 8 is gradually compressed under the action of external force, and at the same time, the 7 sets of ruler rod grooves 403 are gradually squeezed into the T-shaped sleeve cavity 204 until the length of the ruler rod grooves 403 exposed on the outside of the annular base 7 meets the usage requirements. Then, the external force is stopped, and the fixing pins 5 are inserted into the two fixing pin threaded holes 202 of the T-shaped sleeve 2. The external force is removed, and the length of the ruler rod grooves 403 exposed on the outside of the annular base 7 remains unchanged.

[0096] The above steps complete the connection and assembly of all components of the fixed amplitude foot pedal step input control device C.

[0097] Example 2: Foot-operated step control mechanism

[0098] like Figure 12 As shown, the components of the foot pedal control mechanism include: left driver foot pedal mechanism A, right driver foot pedal mechanism B, and control device C.

[0099] The components of the left-side driver's pedal mechanism A include: a first left pedal A01 and a first right pedal A02. The operating principle is as follows: the first left pedal A01 and the first right pedal A02 adopt a reverse linkage design. That is, when the first left pedal A01 moves in the first direction (forward), the first right pedal A02 moves in the second direction (backward), and the movement distances of the first left pedal A01 and the first right pedal A02 are equal. Conversely, when the first left pedal A01 moves in the second direction, the first right pedal A02 moves in the first direction, and the movement distances of the first left pedal A01 and the first right pedal A02 are equal.

[0100] The components of the right driver's pedal mechanism B include: the second left pedal B01 and the second right pedal B02. Their operating principle is the same as that of the left driver's pedal mechanism A, so it will not be described in detail.

[0101] The left driver's pedal mechanism A and the right driver's pedal mechanism B adopt a unidirectional linkage design. That is, when the first left pedal A01 of the left driver's pedal mechanism A moves in the first direction, the second left pedal B01 of the right driver's pedal mechanism B moves in the first direction at the same time, and the movement distance of the first left pedal A01 and the second left pedal B01 is equal. When the first right pedal A02 of the left driver's pedal mechanism A moves in the first direction, the second right pedal B02 of the right driver's pedal mechanism B moves in the first direction at the same time, and the movement distance of the first right pedal A02 and the second right pedal B02 is equal.

[0102] Example 3: Manipulation Method

[0103] Taking the left foot pedal A01 of the left driver's foot pedal mechanism A as an example of a 3 cm step pedal operation in the first direction. Pull out the fixing pin 5 in the control device C that was connected and assembled in the previous steps, and apply external force to the anti-slip sleeve 9 again to compress the elastic component 3. At the same time, the 7 sets of scale rod grooves 403 are gradually squeezed into the T-shaped sleeve cavity 204 until the third scale rod groove 403 is just exposed on the outside of the annular base 7. Then stop the external force, insert the fixing pin 5 into the two fixing pin threaded holes 202 of the T-shaped sleeve 2, and remove the external force. The part of the scale rod groove 403 exposed on the outside of the annular base 7 is just the third scale rod groove, that is, the extension length is 3 cm (the distance between the chamfered end face 402 of the scale rod and the first set of scale rod grooves 403 is 1 cm, and the distance between the scale rod grooves 403 is 1 cm. The thickness of the bottom surface of the anti-slip sleeve 9 can be ignored here).

[0104] Furthermore, the driver on the right grips the handle 101 of the control device C, and then gently touches and holds the other end of the control device C (the end where the anti-slip sleeve 9 is located) to point d of the second right foot pedal B02.

[0105] Furthermore, when the left driver applies appropriate force to the first left pedal A01 to move in the first direction, the right driver's second right pedal B02 moves in the second direction. Under the action of external force, the elastic component 3 is compressed and gradually shortened, and the scale rod 4 is compressed and gradually retracted into the T-shaped sleeve cavity 204 until the second right pedal B02 touches the annular base 7 (at this time, the scale rod 4 is completely compressed into the T-shaped sleeve cavity 204). Since the right driver's right hand resists the handle bar 101, the second right pedal B02 of the right driver's pedal mechanism B, which is hindered by external force, will no longer move in the second direction. Similarly, the first left pedal A01 of the left driver's pedal mechanism A will not move in the first direction, thus completing the fixed amplitude pedal step input.

[0106] It should be noted that, as Figures 3 to 11 The schematic diagram of the control device and its sub-components shown includes:

[0107] 1. Handle lever; 2. T-sleeve; 3. Spring assembly; 4. Ruler lever; 5. Fixing pin; 6. Annular washer; 7. Annular base; 8. Countersunk screw; 9. Anti-slip sleeve.

[0108] The components are as follows: Handle rod 1 includes 2 sub-components: handle rod 101 and handle rod sleeve 102; T-sleeve 2 includes 5 sub-components: countersunk threaded hole 201, fixing pin threaded hole 202, T-sleeve threaded hole 203, T-sleeve cavity 204, and T-sleeve base 205; Ruler rod 4 includes 3 sub-components: ruler rod base 401, ruler rod chamfered end face 402, and ruler rod groove 403; Annular base 7 includes 1 sub-component: annular base threaded hole 701; Anti-slip sleeve 9 includes 2 sub-components: anti-slip sleeve inner cavity 901 and anti-slip groove 902.

[0109] like Figure 12 The schematic diagram of the control device and its sub-components shown includes:

[0110] The foot pedal step control mechanism includes: left driver foot pedal mechanism A, right driver foot pedal mechanism B, and control device C.

[0111] Among them: the left driver's pedal mechanism A includes two sub-components: the first right pedal A01 and the first left pedal A02; the right driver's pedal mechanism B includes two sub-components: the second right pedal B01 and the second left pedal B02.

Claims

1. A foot pedal step control device, characterized in that, The foot pedal step control device includes: T-sleeve, including threaded hole for fixing pin; An annular base is connected to one end of the T-shaped sleeve; wherein the annular base includes a circular hole; A ruler rod, one end of which is disposed on the T-shaped sleeve, and the other end of which can pass through the circular hole; An elastic component is disposed inside the T-shaped sleeve. One end of the elastic component is fixedly connected to the bottom end face inside the T-shaped sleeve, and the other end of the elastic component is in contact with one end of the scale rod. A retaining pin is used to pass through the threaded hole of the retaining pin and the elastic component to compress and limit the elastic component; The T-sleeve includes: The T-shaped sleeve cavity includes an opening for accommodating the elastic component and the scale rod; wherein the annular base is disposed in the opening; The scale rod has uniform graduations.

2. The foot pedal step control device according to claim 1, characterized in that, The foot pedal step control device also includes: The handle rod is connected to the T-shaped sleeve.

3. The foot pedal step control device according to claim 1, characterized in that, The foot pedal step control device also includes: An annular washer is disposed between the annular base and the T-shaped sleeve.

4. A foot-operated step control mechanism, characterized in that, The operating mechanism includes the foot pedal step control device as described in any one of claims 1-3; The control mechanism also includes: a left driver's foot pedal mechanism and a right driver's foot pedal mechanism; The left and right driver pedal mechanisms are linked in the same direction; the control device abuts against the left or right driver pedal mechanism.

5. The operating mechanism according to claim 4, characterized in that, The left-side driver's foot pedal mechanism includes: First left foot push; The first right pedal is linked in the opposite direction to the first left pedal. The right-side driver's foot pedal mechanism includes: Second left foot push; The second right pedal is linked in the opposite direction to the second left pedal. The first left pedal and the second left pedal are linked in the same direction, and the first right pedal and the second right pedal are linked in the same direction; the control device abuts against any one of the first left pedal, the first right pedal, the second left pedal, and the second right pedal.

6. A foot-operated step control method, characterized in that, The method is applied to the operating mechanism as described in claim 5; The method includes: The first left foot pedal acquires a step input; The first left foot pedal moves in a first direction based on the step input, the second right foot pedal moves in a second direction, the scale rod retracts into the T-shaped sleeve cavity, the second right foot pedal contacts the annular base, and the annular base restricts the second right foot pedal from moving in the second direction, thus completing the step operation of the first left foot. The other end of the ruler bar abuts against the second right foot pedal; the first direction is opposite to the second direction.

Images