Tether type ocean current generator motion modeling method

A modeling method and generator technology, applied in the field of dynamic modeling, can solve problems such as generator position and attitude error, tether flexible characteristic description, etc., to achieve the effect of ensuring completeness and accurate dynamic characteristics

Pending Publication Date: 2019-10-01
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the modeling of tethered kite generators, for the convenience of analysis, the tether is usually regarded as a rigid body, and the flexible characteristics of the tether itself cannot be described. When the tether is long, this modeling method will cause the generator There is a large error in the position and attitude of the

Method used

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  • Tether type ocean current generator motion modeling method
  • Tether type ocean current generator motion modeling method
  • Tether type ocean current generator motion modeling method

Examples

Experimental program
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Embodiment

[0053] The basic model of an underwater kite is as figure 2 shown. The kite body is in the shape of an airplane, and its yaw movement in the water can be controlled by the tail rudder. Rigid rods AP are installed on both sides of the wings and the fuselage respectively 1 、BP 1 and CP 1 , the rigid rod at P 1 The points are connected to form a scaffold. Tie one end of the flexible rope to P 1 point, and the other end is tied to the anchor point.

[0054] 1 Coordinate system definition

[0055] Three coordinate systems are established in motion modeling, including ground coordinate system, platform coordinate system and body coordinate system. The trajectory and velocity of the kite body and the trajectory and velocity of the ball are described in the ground coordinate system. Ground coordinate system S g Such as figure 1 shown. S g The coordinate origin O g is the anchor point of the tether, axis O g x g Parallel to the direction of water flow, O g z g perpen...

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Abstract

The invention provides a tether type ocean current generator motion modeling method. The generator is regarded as a rigid body, and six-degree-of-freedom modeling is carried out. A tether of a generator is regarded as a flexible body, the tether is dispersed into a group of rope sections which are connected with each other, the rope sections are modeled as mass-free springs, and a mass ball is arranged at the connection point of every two rope sections, so that a group of balls are obtained; and particle motion modeling is carried out on the balls, and the movement of the tether is described through the movement of the group of balls. The internal force of the tether, the influence of the local tether tension on the stability of the generator and the bending state of the tether under the action of the water flow resistance can be analyzed based on the model established by the method.

Description

technical field [0001] The invention relates to a motion modeling method of a tethered ocean current generator, which belongs to the technical field of dynamic modeling. Background technique [0002] The tethered ocean current generator is a generator that hangs the power generation turbine under the wing, and the wing is tied to a fixed anchor point through a tethering rope, and uses the forward lift component generated by the ocean current on the wing to reciprocate. The water flow velocity at the inlet of the power generation turbine of this generator can reach several times of the ocean current speed, while the water flow speed at the power generation turbine inlet of the traditional fixed ocean current generator can only reach the ocean current speed. Since the power generation capacity is proportional to the cube of the water flow velocity at the inlet of the power generation turbine, the power generation capacity of the tethered ocean current generator is greatly impr...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F2119/06G06F30/20Y02A90/10
Inventor刘哲赵怡周月荣关发明
OwnerCHINA ACAD OF AEROSPACE AERODYNAMICS