CN107643156A - Three axle rotational shaking tables - Google Patents

Abstract

The invention discloses a three-axis rotating vibrating table, which is composed of three parts. 1. Rotating part: composed of DC servo motor, connecting shaft, and turret; 2. Swing part: composed of DC servo motor and transmission mechanism of the swing frame; 3. Vibration device: composed of electric push rod, Hooke hinge, spherical pair And the composition of the electromagnetic vibrating table. The DC servo motor is fixed on the base of the turntable through the motor frame, connected with the transmission shaft through the coupling, and the transmission shaft is connected with the turret through the keyway; the swing frame is connected with the turret through the keyway; The spherical pair is respectively connected with the swing frame and the vibrating table, and the Hooke hinge is respectively fixed with the swing frame and the electric push rod through bolts. The invention can simulate the flight attitude and vibration environment of the aircraft on the ground, avoids placing aviation equipment on the drone for experiments, thereby saving material resources and manpower, and can accurately evaluate the parameters of the camera.

Description

Three-axis rotating shaker

technical field

The invention discloses a three-axis rotating vibrating table device, specifically simulating the influencing factors that affect the aerial photographing quality of an unmanned aerial vehicle. The invention mainly simulates the motion posture and the vibration environment of the aerial roll and pitch of the unmanned aerial vehicle.

Background technique

Aerial cameras are precision optical instruments installed on drones to take pictures of ground scenes. The vibration of the aircraft, the change of the airflow, and the change of the pitch angle of the aircraft will all affect the photographing clarity of the aerial camera. Therefore, in order to improve the photographing quality of the aerial camera, it is necessary to conduct many experiments on the aerial camera, and the actual flight requires a lot of manpower, material resources and capital investment. . In order to reduce capital investment and shorten the development cycle, how to simulate on the ground the factors that affect the clarity of aerial camera photography. The existing electromagnetic vibrator can simulate the vibration frequency of 0.5~10khz, but the displacement of the electromagnetic vibrator is relatively small and the pitch angle cannot be achieved. Although the hydraulic vibrator has a large displacement and can achieve a large pitch angle, its vibration frequency is only It can be realized at 0.5~200hz. The frequency that affects the photo quality is higher than 50hz.

How to achieve a large pitch angle and a large vibration frequency in the laboratory is an urgent problem to be solved for the ground attitude disturbance generator of the aerial camera.

Contents of the invention

Aiming at the defects of the prior art, the present invention provides a three-axis rotating vibrating table device. It mainly consists of three parts. The first part is the rotating part, which is composed of DC servo motor, rotating connecting shaft and turret; the second part is the swing device, which is composed of the swing frame DC servo motor and the transmission mechanism; the third part is the pitching and vibration device, which is composed of an electric push rod, Hooke hinge, spherical pair and electromagnetic vibration table; the rotating part includes base, motor, link and turret; the swing device is composed of motor and swing bracket; the pitch and vibration device is composed of electric push rod and electromagnetic vibration table. The DC servo motor is fixed on the base of the turntable through the motor frame, connected with the transmission shaft through the coupling, and the transmission shaft is connected with the turret through the keyway; the swing frame is connected with the turret through the keyway; The spherical pair is respectively connected with the swing frame and the vibrating table, and the Hooke hinge is respectively fixed with the swing frame and the electric push rod through bolts.

The three-axis rotating vibration table is an aerial camera ground air environment simulation device. The aerial flight simulation of the aerial camera can be carried out in the laboratory, and it can provide important parameters for the aerial performance of the aerial camera, thereby reducing the use of actual flight to test it, thereby reducing manpower, material resources, and capital investment, and shortening the development cycle .

The invention realizes the detection of the aerial camera in the laboratory, and its main technical basis is to simulate the vibration, rolling and pitching of the aircraft in the air. Through the photographing and analysis of the scene by the camera under test, a detailed comprehensive evaluation is made on various technical indicators of the aerial camera.

Description of drawings

Figure 1 is a schematic diagram of the structure of a three-axis rotating vibration table.

FIG. 2 is a schematic diagram of an auxiliary structure of FIG. 1 .

In the figure, 1-base, 2-lifting ring, 3-rotation shaft, 4-turret, 5-swing frame, 6-Hooke hinge, 7-electric push rod, 8-electromagnetic vibration table, 9-block, 10-spherical pair, 11-vibration table.

Claims (7)

1. a kind of three axle rotational vibrations table apparatus, it three parts mainly by being made up of；Part I rotating part, watched by direct current Motor is taken, is rotatablely connected axle, rotating turret composition；Part II is pendulous device by swing span DC servo motor and driver Structure forms；Part III is pitching and vibrating device is hinged by electric pushrod, Hooke, spherical pair and electromagnetic vibration generator system； Rotating part includes base, motor, chaining part and rotating turret；Pendulous device is made up of motor and swinging mounting；Pitching And vibrating device is made up of electric pushrod and electromagnetic vibration generator system, DC servo motor is fixed on rotary table base by motor rack On, it is connected by shaft coupling with power transmission shaft, power transmission shaft is connected with rotating turret by keyway；Swing span passes through keyway and rotating turret Link；Electric pushrod is hinged by Hooke to be connected with swing span and shake table respectively with spherical pair, and Hooke's hinge connected bolt Fixed respectively with swing span and electric pushrod.

2. device according to claim 1, it is characterised in that：DC servo motor 3, electric pushrod 3, Hooke are hinged 3, displacement transducer 3, electromagnetic vibrator one.

3. device according to claim 1, it is characterised in that：Realized and rotated by a motor control turntable；Two other Motor control oscillating table is swung, to realizeRoll angle, realized by three electric pushrodsThe angle of pitch.

4. device according to claim 1, it is characterised in that：Electromagnetic vibrator realizes frequency range 50 ~ 2000Hz's Dither.

5. device according to claim 1, it is characterised in that：Rotational shaking table can realize roll, pitching, swing, turn The action in the air such as dynamic, vibration.

6. device according to claim 1, it is characterised in that：Hydraulic stem is hinged by Hooke with silent flatform and linked.

7. device according to claim 6, it is characterised in that it is by a cross frame, two fixed plate groups that Hooke, which is hinged, Into.