Pitching assembly of radar scanner for detecting foreign matters on runways

Abstract

The invention belongs to technologies for aviation support equipment, and relates to an improved pitching assembly of a radar scanner for detecting foreign matters on runways. The improved pitching assembly comprises a right backup plate (1), a backup plate cover (2), a servo module (3), a right angular contact ball bearing (4), a pitching frame end cover, a left arm, a left angular contact ball bearing (7), a left backup plate, a backup plate cover (9), a pitching frame and a right arm. A pitching motor is a permanent-magnet direct-current brushless torque motor (20) and is of a hollow shaft sleeve type, a stator of the pitching motor is mounted on a servo frame (18), a rotor of the pitching motor is mounted on the left backup plate (21), the servo module (3) is mounted inside the pitching frame (18), a pitching angle is fed via a rotary transformer (26) sleeved on a revolving shaft (23), a revolving stator is fixed into the pitching frame by the aid of a hoop, and axial clearance and pre-tightening force can be regulated by the aid of a sleeve (25) and a jackscrew (24). The improved pitching assembly has the advantages of high transmission and scanning precision, capability of meeting the requirement on low scanning speed, light weight, small size, high system rigidity, protection grade and reliability and long service life.

Description

technical field [0001] The invention belongs to aviation support equipment technology, and relates to the improvement of a pitching part of a runway foreign object detection radar scanner. Background technique [0002] Runway foreign objects generally refer to foreign substances that may damage aircraft or systems. It is easy to be sucked into aircraft engines or accumulated in mechanical devices, affecting the normal operation of aircraft equipment, and even causing aircraft crashes. The global annual loss caused by it is 3 to 4 billion yuan. In addition, the indirect losses caused by flight delays and runway closures are far greater than the direct losses. At present, the detection of foreign objects on the runways of most airports in the world is done manually. The loss is great. The runway foreign object detection radar scanner is a high-precision electromechanical integration device. It has been working near the runway of the open-air airport for a long time. It is th...

AI Technical Summary

Problems solved by technology

[0006] First, the transmission and scanning precision is low

The reasons are: 1. The structure adopts the combination of servo motor and gear reducer. There are fit tolerances between the motor and the reducer, inside the reducer (gear backlash, etc.), and between the reducer and the azimuth shaft. It will increase the transmission error, so the transmission accuracy is low and the scanning accuracy is low; 2. The structure adopts open-loop control, and its control accuracy is low, which cannot meet the precise position control of the scanner pitch, so its scanning accuracy is low

[0007] Second, it cannot meet the requirements of low scanning speed

Since the structure uses a servo motor, the low-speed requirements are achieved through the reducer, and its control volume, gear series, and teeth are limited, which cannot meet the extremely low speed requirements.

[0008] Third, the weight and volume are large, and the system stiffness is low

The reasons are: 1. The motor is connected in series with the shaft, and a reducer is used to meet the low-speed requirements. There are many mechanical structures, so the axial dimension is large, the weight and volume are large, and the system rigidity is low; 2. The pitch motor and The servo modules are installed on the left and right side panels. These two components are heavy. Such installation causes the center of gravity to be unfocused and the system rigidity to be low.

[0009] Fourth, low reliability and short life

The reasons are: 1. The runway foreign object detection radar scanner needs to work in the open air for a long time, and its working environment is harsh. The structure adopts a gear reducer, and the gears are worn, which will affect the life of the gears. The particles under the wear will also affect the mechanical and electrical machinery such as bearings. Component life; 2. There are many connectors between the servo module and the pitching frame, and the external lines are complicated. The motor and control lines of this structure have frequent relative movements with respect to the pitching frame, and the wires are frequently bent, which is easy to cause breakage; 3 , the structure has no mechanical limit or uses mechanical limit parts alone, and the increase of parts will reduce the reliability of the system

Therefore, the reliability of the structure is very low

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