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Xi'an Hoan Microwave Co.,ltd

Fabrication Method of Quadcopter Vibration Isolator

2019.05.22

Background technology of Quadcopter Vibration Isolator manufacture:

Quadcopter includes some special equipment which need stable environment in work engineering, such as inertial measurement device. Influenced by the external air resistance and its own power plant, the four-axis vehicle will generate vibration excitation during flight and transmit it to the specific equipment, which will produce greater vibration on the specific equipment.

The inertial measurement device is one of the core sensors of the four-axis vehicle. It is used to measure the angular velocity and acceleration of the Quadcopter body, and then to calculate the attitude of the Quadcopter. This ensures the safe navigation of the Quadcopter in the external environment. For inertial measurement devices, measurement accuracy is one of the most critical indicators. The noise caused by the vibration of the fuselage is an important factor affecting the measurement accuracy of the inertial measurement device.

The traditional quadcopter vibration isolation of the fixed inertial measurement device by suspending the shock absorber ball and installing the fixed inertial measurement device. However, the natural frequencies of the translational vibration modes of the shock absorber mounted on the suspension ball in three directions are quite different. The so-called three directions are one vertical direction and two horizontal directions. The natural frequencies corresponding to the translational modes in the vertical direction of the vibration absorber are much larger than those corresponding to the translational modes in the two horizontal directions. This makes it impossible to isolate the vibration in three directions simultaneously when the vibration is passed through the vibration absorber, so that the measurement accuracy of the inertial measurement device is poor.

Technological implementation elements:

Based on this, it is necessary to provide a Quadcopter and its vibration absorber to solve the problem that the three-direction vibration can not be effectively isolated at the same time when passing through the vibration absorber and the measurement accuracy of the inertial measurement device is poor.

A vibration absorber is used to connect the fuselage of a Quadcopter and an inertial measurement device. The vibration absorber includes:

The bellows body is used to absorb vibration and deform. The first extension part is arranged at the end of the bellows body, and the first extension part is used to connect the fuselage. The second extension part is arranged on the bellows body far from the end of the first extension part. The second extension is used to connect the inertial measurement device.

The quadcopter vibration isolation and the quadcopter is arranged at the end of the bellows body, and the first extension connects the fuselage. The second extension part is arranged on the bellows body far from the end part of the first extension part. The second extension is connected with the inertial measurement device, so that the fuselage and the inertial measurement device are connected together through the vibration isolation device of thequadcopter. Because the bellows are used to absorb vibration and deform. When the quadcopter vibration isolation is transmitted to the vibration isolation device of the four-axis vehicle, the bellows absorb the vibration and contract or elongate or bend, so that the vibration is transmitted to the inertial measurement device through thequadcopter vibration isolationat a lower frequency. The quadcopter vibration isolation mentioned above greatly increases the horizontal dimension of the quadcopter vibration isolation. This makes the horizontal dimension of the vibration isolation device larger than the vertical dimension, and makes the natural frequencies of the translational vibration modes corresponding to the three directions of the quadcopter vibration isolation basically consistent. It solves the problem that the natural frequencies of the three directional translational modes of quadcopter vibration isolation differ greatly. Because the vibration in three directions can be effectively isolated when passing through the vibration isolation device of four-axis aircraft, the measurement accuracy of the inertial measurement device can be guaranteed, and the problem of poor measurement accuracy of the inertial measurement device can be solved. In the design, the natural frequencies corresponding to the translational modes in the three directions of the fuselage can be adjusted by changing the dimensions, shapes and wall thickness of the bellows.

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