A Method for Predicting Internal Tension of Tether in Elevator System in Local Space

Abstract

The invention discloses a method for predicting internal tension of tying ropes of elevator systems in local spaces. The method includes steps that the elevator systems carry out planar movement in systems, mother stars are used as original points of moving coordinate systems of the systems, the mother stars are heavier than elevator cabins and operation spacecrafts, tracks of the mother stars areunaffected by movement of component stars, included angles between the tying ropes and Ox are represented as theta 1 and theta 2, the lengths of the portions, which are positioned between the motherstars and the elevator cabins, of the tying ropes are represented as L1, the lengths of the portions, which are positioned between the elevator cabins and the operation aircrafts, of the tying ropes are represented as L2, gravitation vectors of the elevator cabins m1 and gravitation vectors of the operation aircrafts m2 are represented as G1 and G2, and kinetic equations of elevator cabin bodies are established; inherent tension T0 of the tying ropes in the elevator systems in the local spaces is computed; tension generated by active force of the elevator cabins is obtained according to the kinetic equations of the elevator cabin bodies; the internal tension T1 and T2 of the corresponding tying ropes at the upper end and the lower end of each elevator system in the corresponding local spaces is computed. The method has the advantage that the internal tension of the tying ropes in the elevator systems in the local spaces can be predicted by the aid of the method.

Description

technical field [0001] The invention belongs to the field of aerospace technology and relates to a method for predicting the internal tension of a tether in a local space elevator system. Background technique [0002] With the development of space technology, space missions are becoming increasingly diverse and complex. Among many space systems, the local space elevator system is an on-orbit service system with broad application prospects. The system can realize the transportation of goods and personnel between spacecraft with orbital gradient differences on the order of 10 kilometers to 100 kilometers, thereby avoiding the collision risk caused by the close approach and docking of space platforms, reducing fuel consumption, and greatly improving Safety of space platforms during mission execution. [0003] Most of the current local space elevator systems are three-body tether structures, which consist of three spacecraft and tethers connected between them. The material of...

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Problems solved by technology

In this case, all analysis and control based on the original dynamic model will be invalid, and the system will be completely unpredictable

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