A dummy for aviation seat experiment

Abstract

The present invention provides a dummy for aviation seat experiments, which aims to meet experimental requirements through structural improvement and match with traditional Hybrid-III type dummies. The connection interface can connect related parts. The dummy for aviation seat experiments provided by the present invention is connected through the rigid structure of the neck, which not only limits the left and right deflection movement of the neck component, but also realizes the pitch of the head component because the structure of the neck is the mutual superposition of rubber and metal sheets. In the hip joint, two limiting grooves and limiting protrusions are used to realize the rotation and twisting of the thigh, realize the range of leg activities, meet the experimental requirements, and utilize the design and improvement of the dummy's own structure to improve the responsiveness of the dummy during the experiment and increase the authenticity of the experiment.

Description

Technical Field

[0001] The invention relates to a dummy for aviation seat experiments. Background Art

[0002] Nowadays, dummies are needed for experiments in many experimental fields, especially in the military industry. In the aviation field, the driver's position needs to be checked for safety, so it is necessary to use high-speed airflow to achieve this. In order to meet the experimental results, it is usually necessary to make a dummy to replace the driver for actual testing. In this process, the dummy's torso and head need to be formulated according to the standards of the pilot's body. Not only are the joints of the dummy's components required to simulate real people, but it is also required to simulate the human body's reaction to the environment under the test environment. Therefore, the production of the dummy needs to ensure both the rationality of the dummy's joint structure and the connection between the dummy's skin and bones.

[0003] The wind attack test is mainly used to detect whether the assembly used by the pilot meets the requirements. The assembly itself needs to protect the safety of the pilot working at high altitude. At the same time, due to special situations such as aircraft ejection, the assembly needs to provide complete protection for the pilot. Therefore, the test of the high-speed airflow blowing dummy is to simulate the scene of the high-speed airflow of 1,400 kilometers per hour that the pilot needs to face when the ejection seat of a fighter jet is used to rescue the fighter.

[0004] Since this is a wind test, the dummy's overall and segmented mass, center of mass position, and moment of inertia must be consistent with the requirements of mass regression equations A.1 and A.3 in Appendix A of GJB6895-2009 "Human Inertia Parameters for Male Pilots". At the same time, since the traditional experimental dummy Hybrid-Ⅲ has been widely used, the connection structure is required to be consistent with Hybrid-Ⅲ as much as possible to facilitate mutual matching. However, the Hybrid-Ⅲ model dummy does not meet the victory characteristics of Asians, and is used in traditional automobile experiments. It cannot adapt to the blowing of high-speed airflow, and a new type of dummy needs to be redesigned. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a dummy for aviation seat experiments, aiming to meet the experimental requirements through structural improvements, while matching with the traditional Hybrid-Ⅲ type dummy, and the connection interface can connect related parts.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a dummy for aviation seat test, comprising a head component, a neck component, an upper body component, a lower body component, a hip component, a leg component and an arm component;

[0007] The head component includes skin and skeleton, and can wear pilot helmet and mask equipment;

[0008] The neck component is a cylindrical spiral structure, one end of which is connected to the head. The spiral structure uses rubber and metal sheets superimposed on each other to achieve pitching movement in the front-back direction;

[0009] The upper body component is a rectangular metal cavity without ribs, so as to carry the data acquisition system and supporting equipment as well as the upper body component counterweight;

[0010] The lower body component is a straight lumbar spine, the lumbar spine is mainly composed of rubber parts, and the upper and lower metal plate end surfaces are respectively connected to the pelvis and thoracic spine cavity;

[0011] The hips are designed in a standing position and contain the weight of the lower body component;

[0012] The leg assembly includes a thigh, a calf and a sole, wherein the thigh is connected to the pelvis of the lower body through a hip joint, the thigh is connected to the calf through a knee joint, and the calf is connected to the sole through an ankle joint. The joints are interconnected and limited to achieve a range of motion consistent with that of the joints of a normal human body.

[0013] The arm assembly includes an upper arm, a lower arm and a palm, the upper arm is connected to the upper body assembly through a shoulder joint, the upper arm is connected to the lower arm through an elbow joint; the lower arm is connected to the palm through a wrist joint, and the joints are connected and limited to each other, so as to achieve the same range of motion as that of the joints of a normal human body;

[0014] The head component, neck component, shoulders of the upper torso component, and knees of the leg components are installed with distributed sensors, which have the function of carrying general electrical measuring equipment; the chest cavity of the upper torso component is equipped with a data acquisition device to record or telemeter the transmitted data signals.

[0015] Furthermore, the interior of the head assembly is a hollow metal structure, and an acceleration sensor mounting seat is provided at the center of mass of the structure for mounting the sensor.

[0016] Furthermore, the upper body component is configured as a frame-type metal structure, which is hollow inside; the lower body component is configured as a straight lumbar vertebra, which is distributed in the vertical direction and extends along one side of the upper body component, and is provided with metal plates at the upper and lower ends, respectively connecting the neck component and the hip component.

[0017] Furthermore, a space is provided inside the buttocks to place the counterweight of the lower body component and is connected to the hip joint.

[0018] Furthermore, the neck assembly has a built-in steel cable to provide the neck assembly with an adjustable pitch force and ensure the safety of the head and neck connection; the metal sheet and rubber sheet in the spiral structure are superimposed on each other to form a rigid structure as a whole, thereby limiting the left and right deflection movement of the neck.

[0019] Furthermore, the hip joint is connected by a three-axis limited rotation joint mechanism, and a damping friction plate is arranged on the kinematic pair rotating around the lower torso to ensure that when the thigh is lifted to an angle of 30 degrees with the knee as the force point in a simulated sitting state, the torque is not greater than 95Nm, and the limited stroke ensures that the thigh is lifted to an angle of 40 degrees with the horizontal plane.

[0020] Furthermore, the hip joint includes a fixed disc, a connecting disc, a rotating connector, a transition connector and a thigh connector; the fixed disc is circular in shape, located on the outside of the hip joint, and fixes the hip joint; the connecting disc is located on the fixed disc, coaxially connected to the fixed disc, and rotates around the central axis of the fixed disc; the rotating connector is located on one side of the connecting disc, fixedly connected to the connecting disc, and rotates with the connecting disc; the transition connector is located on one side of the rotating connector, connected to the rotating connector axis, so that the transition connector can rotate around the rotating connector; the thigh connector is coaxially connected to the transition connector, and rotates around the main axis of the transition connector.

[0021] Furthermore, a limiting groove is provided on the fixed disc, and a limiting boss is provided on the connecting disc. During the rotation of the connecting disc, the limiting boss and the limiting groove cooperate with each other to limit the rotation angle of the hip joint and the angle range of the thigh in the vertical direction around the lower torso.

[0022] Furthermore, the transition connector is in a sleeve-like structure, installed at one end of the thigh connector, and is provided with a second limiting groove; a second limiting boss is provided on the thigh connector, and the second limiting groove and the second limiting boss cooperate with each other to limit the twisting angle of the thigh.

[0023] Furthermore, a limiting member is provided on the calf skeleton, and two limiting members are provided, which are square in shape and fixed at both ends of the calf to limit the position between the skin and the calf skeleton to prevent the skin from separating from the skeleton during twisting.

[0024] Compared with the prior art, the present invention provides a dummy for aviation seat experiments, which is connected by a rigid structure of the neck, which not only limits the left and right deflection movement of the neck component, but also realizes the pitch of the head component because the structure of the neck is the mutual superposition of rubber and metal sheets. In the hip joint, two limit grooves and limit protrusions are used to realize the rotation and twisting of the thigh, realize the range of leg movement, meet the experimental requirements, and utilize the design and improvement of the dummy's own structure to improve the responsiveness of the dummy during the experiment and increase the authenticity of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a dummy according to the present invention is shown.

[0026] Figure 2 A schematic diagram of a dummy neck of the present invention is shown.

[0027] Figure 3 A connection schematic diagram of the hip joint of the present invention is shown.

[0028] Figure 4 A connection schematic diagram of the legs of the present invention is shown.

[0029] Figure 5 A schematic diagram showing a limiting member of the present invention.

[0030] 1. Head assembly, 2. Neck assembly, 3. Upper torso assembly, 4. Lower torso assembly, 5. Hip assembly, 6. Leg assembly, 7. Arm assembly, 8. Thigh, 9. Calf, 10. Sole of foot, 11. Upper arm, 12. Lower arm, 13. Palm, 14. Fixed disc, 15. Connecting disc, 16. Rotating connector, 17. Transition connector, 18. Thigh connector, 19. Limiting groove, 20. Limiting boss, 21. Second limiting groove, 22. Second limiting boss, 23. Limiting member. DETAILED DESCRIPTION

[0031] In one embodiment, the dummy is designed according to standard requirements.

[0032] A dummy for aviation seat experiments, comprising a head component, a neck component, an upper body component, a lower body component, a hip component, a leg component and an arm component;

[0033] The main dimensions of the dummy meet the requirements of the human dimensions of the P50 percentile pilot in GJB 4856-2003 "Human Dimensions of Chinese Male Pilots", see Table 1:

[0034] Serial number name Standard value / mm Design value / mm Difference / mm Whether the requirements are met 1 height 1704.0±10 1705.0 +1.0 yes 2 sit high 925.0±10 923.5 -1.5 yes 3 Sitting posture with eyes high 811.0±10 813.0 +2.0 yes 4 Sitting shoulder height 606.0±10 606.0 0 yes 5 Sitting knee high 500.0±10 500.0 0 yes 6 Hip-knee distance 565.0±10 566.0 +1.0 yes

[0035] Table 1

[0036] Weight requirement: 68.0-78.0kg, design weight 70.5kg;

[0037] The dummy's overall and segmented mass, center of mass position, and moment of inertia are consistent with the requirements of mass regression equations A.1 and A.3 in Appendix A of GJB6895-2009 "Human Inertia Parameters for Male Pilots", see Tables 2 and 3:

[0038]

[0039]

[0040] Table 2

[0041]

[0042] Table 3

[0043] The overall mass, center of mass position and moment of inertia of the high-speed airflow dummy and each segment are designed according to the standard GJB6895-2009 "Male Pilot Human Body" to carry out the data design of each subsystem of the high-speed airflow dummy;

[0044] The dummy's head, neck, shoulders, knees and pelvis are reserved with distributed sensor installation structures, and are equipped with sensor simulation structural parts. The corresponding interface form is designed according to the sensor interface form provided by the buyer;

[0045] The range of motion of the dummy joints is consistent with that of the human body, including: flexion and extension of the shoulder joint, elbow joint, wrist joint, hip joint, knee joint, and ankle joint; internal rotation and external rotation of the upper arm, forearm, and thigh;

[0046] Except for all other standard parts related to sensor installation, national standard parts commonly used in the domestic market should be used, and the use of British, American and other standard parts should be avoided. The performance level of standard parts is 12.9.

[0047] In one embodiment, the head assembly includes skin and a skeleton, and can wear a pilot helmet and mask equipment; the main external dimensions meet the provisions of GJB 4856-2003 "Human Dimensions of Chinese Male Pilots" for the human dimensions of P50 percentile pilots, including the maximum length of the head, the maximum width of the head, the full height of the head, etc. The main data of the occupant's head items are shown in Table 4, and all measurement items meet the specified values ​​of the standard; the interior is a hollow metal structure, and an acceleration sensor mounting seat is provided at its center of mass for mounting the sensor.

[0048]

[0049]

[0050] Table 4

[0051] In one embodiment, the neck assembly is required to be equipped with a standard neck assembly of the Hybird III dummy, and also needs to be a special neck assembly for ejection and rescue that can pitch forward and backward, has adjustable and lockable pitch force, and cannot deflect and rotate left and right. The structural strength meets the following requirements:

[0052] a) Can withstand X-direction (frontal) force: ≥5kN;

[0053] b) Can withstand Y-direction (vertical) force: ≥5kN;

[0054] c) Can withstand Z-direction (lateral) force: ≥3kN;

[0055] d) Able to withstand the head tilting deflection moment: ≥1000NM;

[0056] e) Able to withstand the deflection torque of the head turning up and down: ≥1000NM;

[0057] f) Can withstand the deflection torque of the head turning left and right: ≥1000NM.

[0058] The neck component is a cylindrical spiral structure, one end of which is connected to the head. The spiral structure uses rubber and metal sheets superimposed on each other to achieve pitch movement along the front and back directions; the built-in steel cable provides the neck component with adjustable pitch force and ensures the safety of the head and neck connection; the metal sheets and rubber sheets in the spiral structure are superimposed on each other to form a rigid structure as a whole, which limits the left and right deflection movement of the neck.

[0059] In one embodiment, the chest cavity space of the dummy is designed to be 230mm×125mm×330mm. The thoracic vertebra box has a counterweight function and structure, and can be installed with a counterweight of 1kg per unit, which can be adjusted in the range of 0-5kg. Counterweight blocks can also be configured in the circular holes of the lumbar vertebrae to achieve adjustment of the overall center of mass and mass. The selected materials of the upper torso assembly and the structural strength of each component can withstand an overload of 30G along the spine direction.

[0060] The upper body component is a rectangular metal cavity without ribs structure, so as to carry the data acquisition system and supporting equipment as well as the upper body component counterweight; the upper body component is set as a frame-type metal structure, which is hollow inside; the lower body component is a straight lumbar spine, the lumbar spine is mainly structured with rubber parts, and the upper and lower metal plate end faces are respectively connected to the pelvis and thoracic spine cavity; the straight lumbar spine is distributed in the vertical direction, extending along one side of the upper body component, and metal plates are provided at the upper and lower ends, which are respectively connected to the neck component and the hip component.

[0061] In one embodiment, the buttocks are designed in a standing position and contain the counterweight of the lower body component; a space is provided inside to place the counterweight of the lower body component and is connected to the hip joint.

[0062] In one embodiment, the range of motion of the leg assembly is as shown in Table 6, Table 7 and Table 8:

[0063] angle Hip range of motion α6 (around Z axis) 50°～180° β6 (around Y axis) 90°～135° γ6 (around X axis) 70°～140°

[0064] Table 6

[0065]

[0066] Table 7

[0067]

[0068] Table 8

[0069] The leg assembly includes a thigh, a calf and a sole of the foot, wherein the thigh is connected to the pelvis of the lower body through a hip joint, the thigh is connected to the calf through a knee joint, and the calf is connected to the sole of the foot through an ankle joint. The joints are interconnected and limited to achieve a range of motion consistent with that of normal human joints; the hip joint is connected by a three-axial limited rotation joint mechanism, and a damping friction plate is arranged on the kinematic pair rotating around the direction of the lower body to ensure that when the thigh is lifted to an angle of 30 degrees with the horizontal plane with the knee as the force point in a simulated sitting position, the torque is not greater than 95Nm, and the limited stroke ensures that the thigh is lifted to an angle of 40 degrees with the horizontal plane.

[0070] The hip joint comprises a fixed disc, a connecting disc, a rotating connecting piece, a transition connecting piece and a thigh connecting piece; the fixed disc is circular in shape, located on the outside of the hip joint, and fixes the hip joint; the connecting disc is located on the fixed disc, coaxially connected with the fixed disc, and rotates around the central axis of the fixed disc; the rotating connecting piece is located on one side of the connecting disc, fixedly connected with the connecting disc, and rotates with the connecting disc; the transition connecting piece is located on one side of the rotating connecting piece, and is axially connected with the rotating connecting piece, so that the transition connecting piece rotates around the rotating connecting piece; the thigh connecting piece is coaxially connected with the transition connecting piece, and rotates around the main axis of the transition connecting piece. A limiting groove is provided on the fixed disc, and a limiting boss is provided on the connecting disc. During the rotation of the connecting disc, the limiting boss and the limiting groove cooperate with each other to limit the rotation angle of the hip joint and the angle range of the thigh rotating in the vertical direction around the lower body. The transition connector is in a sleeve-like structure, installed at one end of the thigh connector, and is provided with a second limit groove; the thigh connector is provided with a second limit boss, and the second limit groove and the second limit boss cooperate with each other to limit the twisting angle of the thigh. A limit piece is provided on the calf skeleton, and two limit pieces are provided, which are in a square shape and fixed at both ends of the calf to limit the position between the skin and the calf skeleton to prevent the skin from detaching from the skeleton during twisting. The entire calf and sole should withstand the impact load of landing at a speed of not less than 10m / s.

[0071] In one embodiment, the range of motion of the arm assembly is as shown in Table 5:

[0072]

[0073] Table 5

[0074] The arm assembly includes an upper arm, a forearm and a palm. The upper arm is connected to the upper body assembly through a shoulder joint, and the upper arm is connected to the forearm through an elbow joint; the forearm is connected to the palm through a wrist joint, and the joints are interconnected and limited to achieve a range of motion consistent with that of the joints of a normal human body.

[0075] In one embodiment, distributed sensors are installed on the head component, neck component, shoulders of the upper torso component, and knees of the leg components, which have the function of carrying general electrical measuring equipment; a data acquisition device is installed in the chest cavity of the upper torso component to record or telemeter the transmitted data signals.

[0076] In one embodiment, the softness and smoothness of the dummy's skin should be close to that of a real person, and can withstand an airflow load of no less than 1400 km / h; polymer rubber plastic materials are used to simulate the dummy's skin and muscles and wrap the internal rigid cavity; under ambient temperature of -20°C-40°C and humidity of 10-70%, the designed Shore A hardness of the skin material is 30±5, the tear strength is 30±10 kN / m, the compression permanent deformation is <3% (excluding the foaming material part), and the designed thickness of the skin is 10±2 mm, which can fully withstand an airflow load of no less than 1400 km / h without obvious tearing and damage, thereby ensuring the integrity of the skin during its service life; the dorsal side of the skin and muscles wrapped around the chest and shoulders adopts two sets of longitudinal and transverse zipper structures, which can be easily replaced after the skin is damaged; at the same time, it is convenient for the disassembly and assembly of the dummy data acquisition system and its supporting devices, the arrangement of cables, and the adjustment of the weight and center of mass of the upper body components.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than a limiting technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A dummy for aviation seat testing, characterized in that: Includes head assembly, neck assembly, upper torso assembly, lower torso assembly, hip assembly, leg assembly and arm assembly; The head component includes skin and skeleton, and can wear pilot helmet and mask equipment; The neck component is a cylindrical spiral structure, one end of which is connected to the head. The spiral structure uses rubber and metal sheets superimposed on each other to achieve pitching movement in the front-back direction; The upper body component is a rectangular metal cavity without ribs, so as to carry the data acquisition system and supporting equipment as well as the upper body component counterweight; The lower body component is a straight lumbar spine, the lumbar spine is mainly composed of rubber parts, and the upper and lower metal plate end surfaces are respectively connected to the pelvis and thoracic spine cavity; The hips are designed in a standing position and contain the weight of the lower body component; The leg assembly includes a thigh, a calf and a sole, wherein the thigh is connected to the pelvis of the lower body through a hip joint, the thigh is connected to the calf through a knee joint, and the calf is connected to the sole through an ankle joint. The joints are interconnected and limited to achieve a range of motion consistent with that of the joints of a normal human body. The arm assembly includes an upper arm, a lower arm and a palm, the upper arm is connected to the upper body assembly through a shoulder joint, the upper arm is connected to the lower arm through an elbow joint; the lower arm is connected to the palm through a wrist joint, and the joints are connected and limited to each other, so as to achieve the same range of motion as that of the joints of a normal human body; The head component, the neck component, the shoulders of the upper torso component, and the knees of the leg components are equipped with distributed sensors, which have the function of carrying general electrical measuring equipment; the chest cavity of the upper torso component is equipped with a data acquisition device to record or telemeter the transmitted data signal; The hip joint is connected by a three-axis limited rotation joint mechanism, and a damping friction plate is arranged on the kinematic pair rotating around the lower body direction to ensure that when the thigh is lifted to an angle of 30 degrees with the horizontal plane with the knee as the force point in a simulated sitting state, the torque is not greater than 95Nm, and the limited stroke ensures that the thigh is lifted to an angle of 40 degrees with the horizontal plane; The hip joint includes a fixed disc, a connecting disc, a rotating connector, a transition connector and a thigh connector; the fixed disc is circular in shape, located on the outside of the hip joint, and fixes the hip joint; the connecting disc is located on the fixed disc, coaxially connected to the fixed disc, and rotates around the central axis of the fixed disc; the rotating connector is located on one side of the connecting disc, fixedly connected to the connecting disc, and rotates with the connecting disc; the transition connector is located on one side of the rotating connector, connected to the rotating connector axis, so that the transition connector can rotate around the rotating connector; the thigh connector is coaxially connected to the transition connector and rotates around the main axis of the transition connector.

2. The dummy for aviation seat test according to claim 1, characterized in that: The interior of the head component is a hollow metal structure, and an acceleration sensor mounting seat is arranged at the center of mass of the head component for mounting the sensor.

3. The dummy for aviation seat test according to claim 1, characterized in that: The upper body component is configured as a frame-type metal structure, which is hollow inside; the lower body component is configured as a straight lumbar vertebra, which is distributed in the vertical direction and extends along one side of the upper body component, and is provided with metal plates at the upper and lower ends, respectively connecting the neck component and the hip component.

4. The dummy for aviation seat testing according to claim 1, characterized in that: The buttocks are provided with a space inside for placing the counterweight of the lower body component and are connected to the hip joint.

5. The dummy for aviation seat testing according to claim 1, characterized in that: The neck component has a built-in steel cable, which provides the neck component with adjustable pitch force and ensures the safety of the head and neck connection; the metal sheet and rubber sheet in the spiral structure are superimposed on each other to form a rigid structure as a whole, which limits the left and right deflection movement of the neck.

6. The dummy for aviation seat testing according to claim 1, characterized in that: A limiting groove is provided on the fixed disc, and a limiting boss is provided on the connecting disc. During the rotation of the connecting disc, the limiting boss and the limiting groove cooperate with each other to limit the rotation angle of the hip joint and the angle range of the thigh rotating in the vertical direction around the lower body.

7. The dummy for aviation seat testing according to claim 1, characterized in that: The transition connector is a sleeve-shaped structure, installed at one end of the thigh connector, and is provided with a second limiting groove; the thigh connector is provided with a second limiting boss, and the second limiting groove and the second limiting boss cooperate with each other to limit the twisting angle of the thigh.

8. The dummy for aviation seat testing according to claim 1, characterized in that: A limiting piece is arranged on the calf frame. Two limiting pieces are arranged in a square shape and are fixed at both ends of the calf to limit the position between the skin and the calf frame to prevent the skin from being separated from the frame during twisting.

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