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Gravity anomaly extended interpolation method of nearspace large-range maneuverable trajectory

A technology that is close to space and disturbs gravity. It is applied in special data processing applications, instruments, and electrical digital data processing. It can solve problems such as large calculation scale, slow calculation speed, and large data storage capacity.

Active Publication Date: 2016-07-13
GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing traditional calculation methods in the fields of geophysics and geodesy usually have the characteristics of large data storage, large calculation scale, and slow calculation speed, which are difficult to meet the requirements of rapid construction of pre-launch gravity models and rapid calculation during flight

Method used

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  • Gravity anomaly extended interpolation method of nearspace large-range maneuverable trajectory

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Embodiment Construction

[0118] Below in conjunction with specific example, the present invention will be further described:

[0119] Simulation based on the CAV-H aircraft model, the basic simulation conditions are set as follows: ① mass m = 908kg, reference area Sm = 0.48375m 2 ;② State parameter of re-entry point: speed V I =6500m / s, velocity inclination θ I = 0°, height H I =80km; ③Terminal state parameter of gliding section: speed V k =2500m, / s speed inclination θ k = 0°, height H k =30km, the terminal track yaw angle deviation is not more than ±5°; ④ Flight constraints: maximum heat flux density Maximum dynamic pressure q max =100kPa, maximum overload n max =3g; ⑤ The waiting distance from the target point at the end of the terminal: S togo = 100 km.

[0120] The simulation computer configuration is: Intel(R) Core(TM) i5-3470CPU3.20GHz, memory 3.46GB. The software environment is WindowXP operating system, and the calculation program is developed based on VC++6.0.

[0121] The specif...

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Abstract

The invention discloses a gravity anomaly extended interpolation method of a nearspace large-range maneuverable trajectory.The method includes the following steps that firstly, a mathematical model of envelope lateral width and longitudinal range of the trajectory is built; secondly, a pole changing coordinate system is built; thirdly, an aircraft dynamic model in the pole changing coordinate system is built; fourthly, a trajectory envelope of the pole changing coordinate system is calculated; fifthly, whole airspace and spatial domain subdivision is conducted on the pole changing coordinate system; sixthly, a common coordinate system gravity anomaly whole airspace reconstructed model is built; seventhly, a gravity anomaly partial reconstructed model along the trajectory is built; eighthly, a subdomain partial curve coordinate system is built; ninthly, gravity anomaly extended interpolation calculation is conducted in the flight process.The method has the advantages of being high in interpolation precision, high in calculation speed and small in data storage amount, can meet the requirements for gravity anomaly quick calculation along any nearspace large-range maneuverable trajectory, and has the capacity of quick flight task responding and temporary changing.

Description

technical field [0001] The invention belongs to the field of aircraft dynamics modeling, and in particular relates to a method for continuation and approximation of disturbance gravitation along a large-scale maneuver trajectory in adjacent space. Background technique [0002] In this technical field, the large-scale maneuvering trajectory in the vicinity of space specifically refers to the trajectory of the hypersonic glide vehicle, including the trajectory of the initial descent segment and the trajectory of the glide segment, where the starting point is the re-entry point and the end point is the end point of the glide segment. This kind of ballistic trajectory stays in the adjacent space for a long time, has the characteristics of lateral large-scale maneuvering, and is significantly affected by the gravitational force of the earth's outer space disturbance. Disturbing gravity affects the determination of the current state of the aircraft by affecting the navigation calc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 周欢丁智坚郑伟汤国建
Owner GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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