Steering engine dual-mode redundancy feedback device

Abstract

The invention discloses a steering engine dual-mode redundancy feedback device which comprises a frame, a rudder shaft, a fan-shaped tooth piece, a potentiometer A, a potentiometer A main gear, a potentiometer A auxiliary gear, a potentiometer B, a potentiometer B main gear and a potentiometer B auxiliary gear. The A potentiometer main gear and the A potentiometer auxiliary gear are mounted on a rotating shaft of the A potentiometer; a potentiometer B main gear and a potentiometer B auxiliary gear are mounted on a rotating shaft of the potentiometer B; the rudder shaft is installed in the frame and can rotate in the frame, the fan-shaped tooth piece is fixed to the end of the rudder shaft and rotates along with the rudder shaft, and the fan-shaped tooth piece is meshed with the A potentiometer main gear and the A potentiometer auxiliary gear through a gear pair to drive the A potentiometer to rotate; the A potentiometer main gear is meshed with the B potentiometer main gear and the B potentiometer auxiliary gear through a gear pair to drive the B potentiometer to rotate. Real-time fault diagnosis is carried out on the collected dual-mode redundancy feedback signals, judgment is reliable, and the real feedback signals are used for rudder system closed-loop control.

Description

Technical Field

[0001] This invention belongs to the field of aircraft control technology, specifically relating to a dual-mode redundant feedback device. Background Technology

[0002] As aircraft develop towards higher speeds and longer endurance, higher demands are placed on the reliability of their onboard equipment. As the core actuator of an aircraft, the servo motor collects position feedback signals in real time and compares them with position command signals to form a closed-loop control system. The position sensor, as a crucial component of the servo motor's output, directly impacts the servo motor's operation due to its reliability.

[0003] Generally, the feedback device selected for servo motors mainly uses position sensors, which primarily include conductive plastic potentiometers and non-contact angular displacement sensors. Traditional conductive plastic potentiometers have drawbacks such as short lifespan and easy wear, making them unsuitable for the long-term vibration environment of aircraft. While non-contact angular displacement sensors solve the wear problem of conductive plastic potentiometers, they contain internal acquisition chips and are susceptible to external high temperatures and electromagnetic compatibility issues, affecting the operation of the servo motor. Summary of the Invention

[0004] The technical problem solved by this invention is that it provides a dual-mode redundant feedback device for servo motors to solve the problems of mechanical wear and insufficient environmental resistance of position sensors in servo motors. It can realize redundant acquisition of servo motor position feedback signals and improve the reliability of servo motor operation.

[0005] The technical solution adopted in this invention is: a servo motor dual-mode redundant feedback device, including a frame, a servo shaft, a sector gear, an A potentiometer, an A potentiometer main gear, an A potentiometer secondary gear, a B potentiometer, a B potentiometer main gear, and a B potentiometer secondary gear; Potentiometer A and potentiometer B are connected in series and installed in the frame; the main gear and auxiliary gear of potentiometer A are installed on the shaft of potentiometer A; the main gear and auxiliary gear of potentiometer B are installed on the shaft of potentiometer B. The rudder shaft is installed in the frame and can rotate within the frame. The sector-shaped gear is fixed to the end of the rudder shaft and rotates with the rudder shaft. The sector-shaped gear meshes with the main gear and the secondary gear of potentiometer A through a gear pair, driving potentiometer A to rotate. The main gear of potentiometer A meshes with the main gear and the secondary gear of potentiometer B through a gear pair, driving potentiometer B to rotate.

[0006] Furthermore, potentiometer A employs a non-contact angular displacement sensor.

[0007] Furthermore, potentiometer B is a conductive plastic potentiometer.

[0008] Furthermore, the output signals of potentiometers A and B are collected and fault diagnosis is performed. If the output signals of potentiometers A and B are both normal, the output of potentiometer A is used as the feedback signal; if the output of potentiometer A is faulty, the output of potentiometer B is used as the feedback signal.

[0009] Furthermore, potentiometer A employs a heat-insulating layer structure internally and is coated with aerosol powder on the circuit board surface.

[0010] Furthermore, potentiometer B employs a double-spring structure and improves vibration resistance by controlling the spring pressure.

[0011] Furthermore, the aforementioned dual-mode redundant feedback device for a servo motor also includes a potentiometer heat insulation pad; the two sides of potentiometer A and potentiometer B are respectively fixed to the corresponding mounting holes by screws and heat insulation pads.

[0012] The advantages of this invention compared to the prior art are: (1) The dual-mode redundant feedback device of the servo motor of the present invention adopts a layout scheme of conductive plastic potentiometer and non-contact angular displacement sensor connected in series to realize redundant acquisition and fault diagnosis of servo motor position feedback signal, improve the reliability of servo motor operation, and identify reliable and real feedback signals for closed-loop control of servo system. The design scheme is simple in structure and suitable for high-reliability servo motor servo systems.

[0013] (2) This invention is suitable for use in lightweight, miniaturized, and highly reliable servo systems. It combines the advantages of high temperature resistance of conductive plastic potentiometers and vibration resistance of non-contact angular displacement sensors, and has a significant advantage in servo design in harsh environments with high temperature and vibration. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the entire servo motor dual-mode redundant feedback device.

[0015] Figure 2 This is a cross-sectional schematic diagram of the feedback device AA.

[0016] Figure 3 This is a cross-sectional schematic diagram of the feedback device BB. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 , Figure 2 As shown, the present invention provides a servo dual-mode redundant feedback device, including: a frame 1, a servo shaft 2, a sector gear 3, an A potentiometer 4, an A potentiometer main gear 5, an A potentiometer secondary gear 6, a B potentiometer 7, a B potentiometer main gear 8, a B potentiometer secondary gear 9, and a potentiometer heat insulation pad 10.

[0019] Potentiometers A (4) and B (7) are arranged in series. Potentiometer A (4) is a non-contact angular displacement sensor, while potentiometer B (7) is a conductive plastic potentiometer. Figure 1 As shown, the rudder shaft 2 can rotate within the frame 1. The sector-shaped gear 3 is fixed together with the rudder shaft 2 and rotates with the rudder shaft. The sector-shaped gear 3 meshes with the main gear 5 and the secondary gear 6 of potentiometer A through a gear pair, driving potentiometer A 4 to rotate. At this time, the rotation angle of the rudder shaft 2 can be obtained through the output of potentiometer A 4.

[0020] The A potentiometer 4 employs a non-contact angular displacement sensor system, which exhibits excellent resistance to vibration environments. Furthermore, the A potentiometer 4's high-temperature resistance is enhanced by adding a heat-insulating layer and coating the circuit board surface with aerosol powder. The combination of the heat-insulating layer structure and aerosol powder coating allows the A potentiometer 4 to withstand ambient temperatures up to 200℃. The B potentiometer 7 utilizes a double-spring structure, and the pressure of the springs is controlled to improve its vibration resistance.

[0021] The main gear 5 of potentiometer A meshes with the main gear 8 and the secondary gear 9 of potentiometer B through a gear pair, driving potentiometer B 7 to rotate. At this time, the rotation angle of the rudder shaft 2 can be obtained through the output of potentiometer B 7. Potentiometer B 7 adopts a conductive plastic potentiometer system, which has good high temperature resistance. At the same time, by adjusting the pressure of the spring assembly inside potentiometer B 7, the vibration resistance of potentiometer B 7 can be improved.

[0022] The servo controller simultaneously acquires the output signals of potentiometer A 4 and potentiometer B 7. By determining whether the output signals of potentiometer A 4 and potentiometer B 7 are normal, it determines which signal participates in the closed-loop control of the servo system. If the output signals of both potentiometer A 4 and potentiometer B 7 are normal, the output of potentiometer A 4 is used as the feedback signal to participate in the closed-loop control of the servo system; if the output of potentiometer A 4 is faulty, the output of potentiometer B 7 is used as the feedback signal to participate in the closed-loop control of the servo system.

[0023] Potentiometers A 4 and B 7 are mounted on frame 1. The housings of potentiometers A 4 and B 7 are fitted to frame 1 using a (H7 / g6) hole-shaft fit to ensure proper mounting position of the two potentiometers. Additionally, heat-insulating pads 10 are added between potentiometers A 4 and B 7 and frame 1 to further improve their high-temperature resistance. Figure 3 As shown.

[0024] The parts of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A servo motor dual-mode redundant feedback device, characterized in that, Includes frame (1), rudder shaft (2), sector gear (3), potentiometer A (4), potentiometer A main gear (5), potentiometer A secondary gear (6), potentiometer B (7), potentiometer B main gear (8) and potentiometer B secondary gear (9); Potentiometer A (4) and potentiometer B (7) are connected in series in the frame (1); the main gear (5) and auxiliary gear (6) of potentiometer A are mounted on the shaft of potentiometer A (4); the main gear (8) and auxiliary gear (9) of potentiometer B are mounted on the shaft of potentiometer B (7). The rudder shaft (2) is installed in the frame (1). The rudder shaft (2) can rotate within the frame (1). The fan-shaped toothed plate (3) is fixed at the end of the rudder shaft (2) and rotates with the rudder shaft (2). The fan-shaped toothed plate (3) meshes with the main gear (5) and the auxiliary gear (6) of potentiometer A through a gear pair, driving potentiometer A (4) to rotate. The main gear (5) of potentiometer A meshes with the main gear (8) and the auxiliary gear (9) of potentiometer B through a gear pair, driving potentiometer B (7) to rotate.

2. The servo motor dual-mode redundant feedback device according to claim 1, characterized in that, Potentiometer A (4) uses a non-contact angular displacement sensor.

3. The servo motor dual-mode redundant feedback device according to claim 1, characterized in that, Potentiometer B (7) is a conductive plastic potentiometer.

4. The servo motor dual-mode redundant feedback device according to claim 1, characterized in that, Collect the output signals of potentiometer A (4) and potentiometer B (7) and perform fault diagnosis. If the output signals of potentiometer A (4) and potentiometer B (7) are both normal, the output of potentiometer A (4) is used as the feedback signal; if the output of potentiometer A (4) is faulty, the output of potentiometer B (7) is used as the feedback signal.

5. A servo motor dual-mode redundant feedback device according to claim 1, characterized in that, Potentiometer A (4) has an internal heat insulation layer structure and is coated with aerosol powder on the circuit board surface.

6. The servo motor dual-mode redundant feedback device according to claim 1, characterized in that, Potentiometer B (7) adopts a double reed structure and improves vibration resistance by controlling the reed pressure.

7. A servo motor dual-mode redundant feedback device according to claim 1, characterized in that, It also includes potentiometer heat insulation pads (10); the two sides of potentiometer A (4) and potentiometer B (7) are fixed to the corresponding mounting holes by screws and heat insulation pads (10).

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