Bearing-only navigation-based closed ring convex optimization optimal rendezvous guidance method

Abstract

A bearing-only navigation-based closed ring convex optimization optimal rendezvous guidance method comprises the following steps: 1) establishing observable property index, fuel property index and error covariance property index; 2) establishing relative dynamic constraint, thrust size constraint, track constraint and view field constraint according to the bearing-only space rendezvous process; 3) designing convex optimization optimal guidance flow: taking the current navigation estimation value as input of an optimization problem; judging the current moment twice, terminating the program if ti is greater than tf, otherwise, continuously performing judgment, wherein the tf is terminal moment; if (the formula is as shown in the description), solving the convex optimization problem and executing the current movement, otherwise, executing the current movement corresponding to the previous solving moment, recirculating the processes until the terminal moment program is terminated, wherein (the formula is as shown in the description) is the given convex optimization problem solving moment; 4) planning the optimal guidance law on line by utilizing the coupling attribute of navigation and guidance. By using the method, optimal observability and optimal fuel consumption can be guaranteed, and the guidance track has robustness relative to initial disturbance.

Description

technical field [0001] The invention belongs to the field of navigation and guidance, and relates to a closed-loop convex optimization optimal rendezvous guidance method based on angle-only navigation. Background technique [0002] Relative navigation and guidance are the key technologies in the field of autonomous spacecraft on-orbit service and in the process of autonomous acquisition and rendezvous of spacecraft. At present, some active active navigation sensors used to measure relative motion information, such as microwave radar and laser radar, etc., due to factors such as large size, high power consumption, high quality and high cost, will not be used in the future autonomous acquisition and rendezvous of non-cooperative targets. will be greatly limited, but passive passive sensors such as optical cameras based on angle information measurement have great advantages and application prospects in this respect. The Swedish PRISMA program has carried out relative navigation...

AI Technical Summary

Problems solved by technology

At present, some active active navigation sensors used to measure relative motion information, such as microwave radar and laser radar, etc., due to factors such as large size, high power consumption, high quality and high cost, will not be used in the future autonomous acquisition and rendezvous of non-cooperative targets. will be greatly limited, but passive passive sensors such as optical cameras based on angle information measurement have great advantages and application prospects in this respect. The Swedish PRISMA program has carried out relative navigation and guidance technology based on angle measurement information. Partial verification, the Raven program of the United States will also verify the relative navigation and guidance technology based on angle information in the near future

[0003] In general, the current research based on angle-only relative navigation and guidance mainly focuses on maneuver trajectory design to improve the observability of angle-only navigation and guidance trajectory design under optimal observability, but lacks the ability to simultaneously satisfy observability. Multi-constraint angle-only optimal guidance under the minimum requirements of observation and fuel consumption, and research on closed-loop optimal robust guidance integrating navigation and guidance

[0004] Since the existing technical research cannot meet the needs of the actual rendezvous process, in order to be close to the actual engineering application, it is necessary to comprehensively consider the index requirements of observability and fuel consumption, and consider the realization of multi-constraint closed-loop online optimal rendezvous robust guidance Let’s study the problem of multi-constraint closed-loop optimal rendezvous guidance for angle-measuring navigation only

Images