CN115265604A - Method and device for analyzing viscosity characteristic of liquid-floated gyroscope based on key characteristic similarity - Google Patents

Abstract

The invention relates to a method and a device for analyzing the viscous characteristic of a liquid-floated gyroscope based on similarity of key characteristics, wherein the method comprises the following steps: the device comprises a stepping motor, a flexible coupling, a liquid floating gyroscope similar device, a precise torque sensor, a motor controller, a digital driver and a digital display module; the liquid floating gyroscope similarity device comprises a left end cover, a right end cover, a bearing, an outer barrel and an inner barrel. The clearance between the inner tube and the outer tube of the similar device of the liquid floating gyroscope is full of high-density large-damping floating oil, the motor controller and the digital driver jointly control the output rotating speed of the motor, the shaft coupling transmits the output power of the motor to the outer tube of the similar device, the outer tube drives the inner floating oil to flow through the wall friction effect, then partial momentum is transmitted to the inner tube through the viscous flow of the floating oil, and the size of the viscous moment borne by the inner tube is measured by the precise torque sensor. The invention realizes the adjustment of the radial clearance of the inner cylinder and the outer cylinder of the liquid floating gyroscope similar device by changing the diameter of the outer cylinder of the liquid floating gyroscope; viscous moment of the floating oil convection acting on the inner cylinder is amplified in a mode of motor active driving; the invention can be applied to the test analysis of the viscous characteristics of various liquid floating inertia instruments.

Description

Method and device for analyzing viscosity characteristic of liquid-floated gyroscope based on key characteristic similarity

Technical Field

The invention relates to a method and a device for analyzing the viscosity characteristic of a liquid floating gyroscope based on similarity of key characteristics, which are suitable for the experimental analysis of the viscosity characteristic of various liquid floating inertial instruments.

Background

The liquid floating gyroscope has the advantages of high precision, long service life, high reliability and the like, is an inertial instrument with highest precision, widest application and highest on-orbit reliability at present in China, and is widely applied to the fields of aviation, aerospace, navigation and the like. Under the action of the heat effect of the internal electronic element, the gyro floating oil in the instrument slowly flows to generate viscous interference torque acting on the surface of the floater, so that the output precision of the instrument is influenced. Because the moment is small and estimated to be micro-nano raw meter magnitude, the radial clearance of the inner cylinder and the outer cylinder of the liquid floating gyroscope and the flow state of floating oil in the inner cylinder are important factors influencing the viscous moment of the inner cylinder, and no effective test means can accurately obtain the viscous force value at present in China.

Therefore, a method and a corresponding device for measuring the viscous disturbance moment on the surface of the floater are not available at present, and the invention provides a method and a device for analyzing the viscous characteristic of the liquid-floated gyroscope based on similar key characteristics.

Disclosure of Invention

The invention aims to: aiming at the problem that the magnitude order of viscous disturbance moment on the surface of a floater is too small to accurately obtain a viscous force value, a method and a device for analyzing the viscous characteristic of a liquid-floated gyroscope based on key characteristic similarity are designed.

The technical scheme of the invention is as follows: a method and a device for analyzing viscous characteristics of a liquid-floated gyroscope based on similarity of key characteristics are characterized by comprising the following steps: the device comprises a stepping motor (1), a motor support (2), a flexible coupler (3), a left support and a bearing (9), a liquid-floated gyroscope similarity device (4), a right support and a bearing (12), a coupler (5), a precise torque sensor (6), a sensor support (7), a motor controller (8), a digital driver (10), a power supply (11), a digital display module (13) and a support plate (14). The liquid floating gyroscope similarity device (4) comprises a left end cover (15), bearings (16, 18), an outer cylinder (17), an inner cylinder (19) and a right end cover (20); the left end cover (15), the right end cover (20) and the outer cylinder (17) are assembled through threaded connection, and the inner cylinder (19) is installed and fixed through bearings (16 and 18) between a shaft of the inner cylinder and a hole of the outer cylinder (20); the clearance between inner tube (19) and urceolus (17) is full of high density big damping oil slick, the output rotational speed of motor controller (8) and digital driver (10) common control motor (1), shaft coupling (3) are with outer tube (17) of motor output power transmission for similar device (4), urceolus (17) drive inside oil slick through the wall friction and flow, and then flow through the viscidity of oil slick and give inner tube (19) with partial momentum transfer, shaft coupling (5) are with the axle of accurate torque sensor (6) and the hub connection of inner tube (19), it is big or small to measure the viscous moment that inner tube (19) received with accurate torque sensor (6), read out the torque value through digital display module (13).

The liquid-floated gyroscope with similar key characteristics is characterized in that: the outer cylinder (17), the inner cylinder (15) and the right end cover (20) have different and matched diameter sizes; the inner cylinder (19) and the outer cylinder (17) adopt concentric structure design.

A liquid-floated gyroscope viscous characteristic analysis method based on key characteristic similarity is realized by the following steps:

A. determining a left end cover (15), an outer cylinder (15) and a right end cover (20) with different diameters according to the viscous force characteristic analysis requirement;

B. the supports (2, 9, 7 and 12) are arranged on the same straight line at a well-adjusted interval, and the motor (1), the flexible coupling (3), the liquid floating gyroscope similarity device (4), the coupling (5) and the precise torque sensor (6) are sequentially connected, so that the axes of the supports are on the same straight line.

C. The motor controller (8) is connected with the motor (1) through a control line, and the digital display module (13) is connected with the precise torque sensor (6) to read the torque value.

D. And (3) setting different rotating speeds by using a motor controller (8) according to actual analysis requirements, and replacing the sizes of the left end cover (15), the outer cylinder (15) and the right end cover (20) to finish measurement of the viscous interference torque.

Drawings

FIG. 1 is a diagram of a connection mode between hardware platforms based on measurement of viscous disturbance moments of liquid-floated gyroscopes with similar key characteristics;

FIG. 2 is a schematic diagram of a liquid-level gyroscope based on similarity of key features;

Detailed Description

The whole design and the position distribution of each part are shown in figure 1, a stepping motor (1) is fixed on a motor bracket (2), an outer cylinder shaft of a liquid floated gyroscope similarity device (4) is fixed through a left bracket and a bearing (9), a flexible coupling (3) connects the motor (1) shaft with the outer cylinder shaft of the liquid floated gyroscope similarity device (4), a rotor shaft is an inner cylinder shaft of the liquid floated gyroscope similarity device (4) and is fixed through a right bracket and a bearing (12), a precise torque sensor (6) is fixed on a sensor bracket (7), and the shaft of the precise torque sensor is connected with the inner cylinder shaft of the liquid floated gyroscope similarity device (4) through a coupling (5); the motor controller (8) and the digital driver (10) control the operation of the motor (1), adjust the torque of the driving shaft, measure the torque of the rotor shaft by using the precise torque sensor (6) to be viscous interference torque, display the value by the digital display module (13), supply power by the power supply (11), and fix the hardware equipment on the support plate (14).

The structure of the similar device (4) of the liquid floated gyroscope is shown in figure 2, a left end cover (15) and a right end cover (20) are assembled with an outer barrel (17) through threaded connection, an inner barrel (19) is fixedly installed through bearings (16 and 18) between a shaft of the inner barrel and a hole of the outer barrel (20), high-density large-damping floating oil is filled between the inner barrel (19) and the outer barrel (17), when the outer barrel (17) rotates, the inner floating oil is driven to flow by wall friction, partial momentum is transmitted to the inner barrel (19) through viscous flow of the floating oil, and the viscous moment of the convection action of the floating oil on the inner barrel (19) is amplified by a mode of active driving of a motor (1). The radial clearance between the inner cylinder and the outer cylinder and the flowing state of floating oil inside the inner cylinder are important factors influencing the viscous moment, so that the radial clearance can be changed by fixing the diameter of the inner cylinder (19) to be unchanged and changing the diameters of the outer cylinder (17), the left end cover (15) and the right end cover (20); the flowing state of the internal floating oil is adjusted by controlling the rotating speed of the motor (1).

The invention designs a method and a device for analyzing the viscous characteristic of a liquid-floated gyroscope based on key characteristics, aiming at the problem that the viscous interference moment on the surface of a gyroscope floater is too small in magnitude order to accurately obtain a viscous force value.

The invention has not been described in detail and is within the skill of the art. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.

Claims (3)

1. A method and a device for analyzing viscous characteristics of a liquid-floated gyroscope based on similarity of key characteristics are characterized by comprising the following steps: the device comprises a stepping motor (1), a motor support (2), a flexible coupler (3), a left support and a bearing (9), a liquid floating gyroscope similarity device (4), a right support and a bearing (12), a coupler (5), a precise torque sensor (6), a sensor support (7), a motor controller (8), a digital driver (10), a power supply (11), a digital display module (13) and a support plate (14). The liquid-floated gyroscope similarity device (4) comprises a left end cover (15), bearings (16, 18), an outer cylinder (17), an inner cylinder (19) and a right end cover (20); the left end cover (15), the right end cover (20) and the outer cylinder (17) are assembled through threaded connection, and the inner cylinder (19) is installed and fixed through bearings (16 and 18) between a shaft of the inner cylinder and a hole of the outer cylinder (20); the gap between inner tube (19) and urceolus (17) is full of high density big damping oil slick, the output rotational speed of motor controller (8) and digital driver (10) common control motor (1), shaft coupling (3) transmit motor output power for urceolus (17) of similar device (4), urceolus (17) drive inside oil slick through wall friction and flow, and then the viscidity through the oil slick flows and transmits partial momentum for inner tube (19), shaft coupling (5) are with the axle of accurate torque sensor (6) and the hub connection of inner tube (19), utilize accurate torque sensor (6) to record the viscous torque size that inner tube (19) received, read out the torque value through digital display module (13).

2. A similarly critical liquid floated gyroscope according to claim 1, wherein: the outer cylinder (17), the inner cylinder (15) and the right end cover (20) have different and matched diameter sizes; the inner cylinder (19) and the outer cylinder (17) adopt concentric structure design.

3. The viscous characteristic analysis method of the liquid floated gyroscope based on similarity of key characteristics is characterized by comprising the following implementation steps of:

A. determining a left end cover (15), an outer cylinder (15) and a right end cover (20) with different diameters according to viscous force characteristic analysis requirements;

B. the support (2, 9, 7 and 12) is adjusted to be arranged on the same straight line at a certain interval, and the motor (1), the flexible coupling (3), the liquid floating gyroscope similarity device (4), the coupling (5) and the precise torque sensor (6) are sequentially connected to enable the axes of the support to be on the same straight line.

C. The motor controller (8) is connected with the motor (1) through a control line, and the digital display module (13) is connected with the precise torque sensor (6) to read the torque value.

D. And (3) setting different rotating speeds by using a motor controller (8) according to actual analysis requirements, and replacing the sizes of the left end cover (15), the outer cylinder (15) and the right end cover (20) to finish measurement of the viscous interference torque.

Images