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CN-121990165-A - Pilot seat height adjustment system and method

CN121990165ACN 121990165 ACN121990165 ACN 121990165ACN-121990165-A

Abstract

The invention belongs to the technical field of aviation electric mechanisms, and relates to a pilot seat height adjusting system and method. The system comprises a motor, a ball screw pair, a position sensor, a logic and signal processing device, a speed reducing device and a limit position protection device, wherein the motor drives a nut of the ball screw pair to rotate through the speed reducing device, one end of a screw of the ball screw pair is connected with a seat through an earring, the logic and signal processing device is connected with the position sensor through a wire, the logic and signal processing device is also connected with the motor and used for controlling the motor to move and monitoring the load current of the motor, and a forward and reverse rotation control signal of the motor is connected with the limit position protection device through the wire.

Inventors

  • HU ZUOYONG
  • LIANG YUXIN
  • CAO LONG
  • FU HONGXU
  • WANG YUNQI
  • HU HONGYAN

Assignees

  • 中国航发哈尔滨东安发动机有限公司

Dates

Publication Date
20260508
Application Date
20260209

Claims (9)

  1. 1. The pilot seat height adjusting system is characterized by comprising a motor, a ball screw pair, a position sensor, a logic and signal processing device, a speed reducing device and a limit position protecting device; the motor drives the nut of the ball screw pair to rotate through the speed reducing device, and one end of the screw of the ball screw pair is connected with the seat through the earrings; The logic and signal processing device is also connected with the motor and used for controlling the motor to move and monitoring the load current of the motor; The positive and negative rotation control signal of the motor is connected with the limit position protection device through a wire.
  2. 2. The system of claim 1, further comprising a shield, a mounting ring, a lower housing; the protective cover and the position sensor form a surrounding structure and are sleeved outside the screw rod, an annular groove is formed in the lower end of the screw rod, a mounting ring is sleeved in the annular groove, the outer surface of the mounting ring is connected with a detection needle mounting plate, an opening is formed in the detection needle mounting plate, and a detection needle of the position sensor is inserted into the opening.
  3. 3. The system of claim 2, wherein a limit bump is arranged on the opposite side of the mounting ring to the mounting plate of the detection needle, a limit chute is arranged in the protective cover along the axial direction of the screw rod, the limit bump slides in the limit chute, a boss is further arranged at the bottom of the protective cover, and the boss is arranged in a groove at the bottom of the lower shell.
  4. 4. The system of claim 1, wherein the system further comprises a limit position transmission device, the limit position transmission device is of a turbine worm structure, a gear is arranged at the lower end of the worm, the gear on the ball screw pair nut drives the gear at the lower end of the worm to rotate in a meshing mode, the worm is meshed with the turbine, the turbine drives a cam of the limit position protection device to rotate, when the screw moves to the extreme position, the cam presses a micro switch of the limit position protection device, the micro switch cuts off power supply of the motor, and the mechanism stops running.
  5. 5. The system of claim 1, further comprising a manual switch, wherein the manual switch is turned on to directly control motor movement, and wherein the manual switch outputs signals having a higher priority than the logic and signal processing device outputs signals.
  6. 6. A pilot seat height adjustment method, implemented on the basis of the system according to any one of claims 1-5, characterized in that the method comprises the steps of: The method comprises the steps of firstly, powering on a system, performing self-checking, and collecting the initial position of a position sensor and the load current I of a motor; Step two, estimating the weight M Human body of the pilot through load current; Checking whether theoretical position data of a position sensor matched with the weight M Human body of the pilot is stored in the system, if yes, entering a step five, otherwise, entering a step four; Calculating a seat theoretical height H 1 according to the height of the pilot, and calculating a theoretical position of a position sensor according to the seat theoretical height; controlling the motor to move according to the initial position of the position sensor and the theoretical position of the position sensor, and adjusting the height of the seat; And step six, detecting whether a manual switch signal is received within a set time, if yes, recording a position sensor adjusted by the manual switch, and updating the theoretical position of the position sensor matched with the weight M Human body of the pilot into the actual position of the position sensor adjusted by the manual switch.
  7. 7. The system of claim 6, wherein in step two, the estimated pilot weight M Human body is calculated as follows: the pilot weight M Human body is estimated by collecting the working current I and comparing with the load characteristic curve function L; wherein I is working current, U is input voltage, phi is motor efficiency, omega is motor rotating speed, and K is adjustment coefficient; M Human body is pilot weight, M Chair is the actual weight of the seat, M Negative pole is the load weight at operating current, and L (I) is a load characteristic curve function.
  8. 8. The system of claim 7, wherein the estimated height of the pilot is estimated by the weight M Human body of the pilot, the estimated sitting height H i is calculated by referring to the human body percentile; In the middle of In order to estimate the height of the seat pan, The seat basin adjustment compensation value is used for the seat basin adjustment value; The seat position is automatically adjusted to the theoretical height If the pilot feels that the eye position is still not suitable, the pilot manually adjusts the seat position to reach the target position ; In the middle of For the target seat pan height, For manual adjustment of the height.
  9. 9. The system of claim 8, wherein the position sensor theoretical position h is calculated based on the seat position height; Where h is the theoretical position of the position sensor, The probe is displaced for the position sensor to the seat pan position difference.

Description

Pilot seat height adjustment system and method Technical Field The invention belongs to the technical field of aviation electric mechanisms, and relates to a pilot seat height adjusting system and method. Background The electric mechanism for adjusting the lifting height of the seat basin is generally manually operated by a pilot, sends a lifting/descending signal to the motor, and outputs the signal through the movement mechanism after the motor rotates to push the seat basin to move so as to realize adjustment, and the flow is shown in fig. 1 in detail. The main problems of the traditional pilot seat adjusting electric mechanism are that each pilot needs to adjust to a proper eye position, certain randomness and repeatability exist when each time the pilot adjusts the seat, the preparation time is increased, the position fluctuation is large, the precision has deviation, the range of the requirement of the eye position line can be exceeded when the position fluctuation is serious, the pilot can feel uncomfortable driving when driving the aircraft, and the flight safety and the operation comfort are affected. Disclosure of Invention It is an object of the present invention to provide a pilot seat height adjustment system and method. The estimated ideal seat position is achieved by means of automatic adjustment. Technical proposal A pilot seat height adjusting system comprises a motor 5, a ball screw pair 1, a position sensor 7, a logic and signal processing device 9, a speed reducing device 14 and a limit position protecting device 13, wherein the motor 5 drives a nut 2 of the ball screw pair 1 to rotate through the speed reducing device 14, one end of a screw 3 of the ball screw pair 1 is connected with a seat through an earring 4, the logic and signal processing device 9 is connected with the position sensor 7 through a wire, the logic and signal processing device 9 is also connected with the motor 5 and used for controlling the movement of the motor 5 and monitoring load current of the motor 5, and a forward and reverse rotation control signal of the motor 5 is connected with the limit position protecting device 13 through a wire. Further, the system further comprises a protective cover 6, a mounting ring 15 and a lower shell 22, wherein an enclosing structure formed by the protective cover 6 and the position sensor 7 is sleeved outside the screw rod 2, an annular groove is formed in the lower end of the screw rod 2, the mounting ring 15 is sleeved in the annular groove, the outer surface of the mounting ring 15 is connected with a detection needle mounting plate 17, an opening is formed in the detection needle mounting plate 17, and the detection needle 8 of the position sensor 7 is inserted into the opening. Further, a limit bump 16 is arranged on one side of the mounting ring 15 opposite to the detection needle mounting plate 17, a limit chute 12 is arranged in the protective cover 6 along the axial direction of the screw rod 3, the limit bump 16 slides in the limit chute 12 to limit the rotation of the mounting ring 15, a boss 11 is further arranged at the bottom of the protective cover 6, and the boss 11 is arranged in a groove at the bottom of the lower shell 22 to accurately ensure the mounting precision of the protective cover. Further, the system further comprises a limit position transmission device 18, the limit position transmission device 18 is in a worm and gear connection mode and is used for transmitting, a gear is arranged at the lower end of the worm 20, the gear on the nut 2 of the ball screw pair 1 drives the gear at the lower end of the worm 20 to rotate in a meshing mode, the worm 20 is meshed with the worm wheel 21, the worm wheel 21 drives the cam 21 of the limit position protection device 13 to rotate, when the screw 3 moves to the extreme position, the cam 21 can press the micro switch 25 of the limit position protection device 13, the micro switch 25 can disconnect a power supply line of the motor 5, the mechanism stops running, and the limit position protection device is used for preventing the screw from exceeding a working stroke. Further, the system also comprises a manual switch, wherein the manual switch is opened to directly control the motor 5 to move, and the priority of an output signal of the manual switch is higher than that of an output signal of the logic and signal processing device. A pilot seat height adjustment method, implemented based on the system, comprising the steps of: Step one, powering up the system, performing self-checking, and collecting the initial position of the position sensor and the load current I of the motor, wherein the collecting mode is shown in figure 2. Step two, estimating the weight M Human body of the pilot through load current; Checking whether theoretical position data of a position sensor matched with the weight M Human body of the pilot is stored in the system, if yes, entering a step five, otherwise, entering a step four;