Method for choosing tasks by foresight

Abstract

The invention discloses a method for choosing tasks by foresight. The method comprises the following steps of: (1) dividing a task area into strips according to the width of a camera; (2) calculating visible time intervals of a satellite on all strips according to the maximum pitching angle and maximum rolling angle of the satellite, sequencing according to starting moments of visible time windows to obtain a task sequence; (3) calculating the observation duration of each task strip in the task sequence by using a secant method; (4) according to satellite attitude maneuver time between the current task and the last scheduled task, judging whether the current task conflicts with the last scheduled task, wherein if the current task conflicts with the last scheduled task, the current task cannot be scheduled, and if the current task does not conflict with the last scheduled task, the next step is executed; (5) acquiring a foresight task group of the current task, and judging whether the current task conflicts with tasks in the foresight task group, wherein if the current task does not conflict with the tasks in the foresight task group, the current task can be scheduled, and if the current task conflicts with the tasks in the foresight task group, the current task is chosen; and (6) outputting a foresight result of the current task.

Description

technical field [0001] The invention belongs to the field of satellite task planning and scheduling, and relates to a method for selecting tasks in the process of satellite task scheduling. Background technique [0002] Rapid attitude maneuvering imaging satellites can realize a variety of complex imaging modes with the help of rapid attitude maneuvering capabilities. Compared with traditional earth observation satellites that use sub-satellite point imaging, the rapid attitude maneuver capability greatly increases the satellite's observation opportunities for targets, and thus has stronger observation capabilities. Each imaging mode of the rapid attitude maneuvering imaging satellite is accompanied by multiple operations such as attitude maneuvering, camera switching on and off, and these operations form a coherent control command sequence. Due to the large number of instructions, the reliability of instruction arrangement and annotation and the real-time execution of inst...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that due to the complexity of the constraints, the problem scale is large, the solution is difficult and time-consuming

For example, in the method of R.Sherwood et al., due to the cumbersome conflict identification and resolution rules adopted, the solution efficiency is low. In the application of EO-1, only 4 tasks can be scheduled every day, which is difficult to meet the requirements of multi-task scheduling. Require

[0006] With the help of the large-angle attitude maneuver capability, the rapid attitude maneuvering imaging satellite widens the visible time window of the target, greatly increases the observation opportunities of the target, and also increases the number of applications of roll maneuver and pitch maneuver. Among them, ignoring the time of a satellite attitude maneuver may lead to the complete impracticability of the follow-up plan, and the number of observation tasks undertaken by the fast attitude maneuver imaging satellite must be far more than that of traditional satellites, and the scale of its task scheduling problem will also be greatly increased. Existing scheduling methods are difficult to obtain a satisfactory solution in a relatively short period of time, so they can no longer meet the needs of fast attitude maneuver imaging satellite task scheduling

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