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Method for autonomously and continuously planning satellite tasks

A mission and satellite technology, applied in the direction of three-dimensional position/course control, etc., can solve the problem of unsafe cancellation or delayed execution of satellite missions, and achieve the effect of ensuring continuous execution and reducing risks

Active Publication Date: 2015-11-18
AEROSPACE DONGFANGHONG SATELLITE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem of the present invention is to overcome the problems caused by the traditional satellite working mode that is mainly based on manual intervention and is constrained by ground measurement and control resource conditions, and provides an autonomous and continuous planning method for satellite tasks. Information such as satellite discharge depth, illumination status, resource status, and safety status of the entire satellite can be used to carry out autonomous and continuous planning of on-board load tasks, execute tasks when the satellite status is safe, and cancel or delay the execution of satellite tasks when it is not safe, so as to solve the problem that satellites do not rely on the outside world Control and information injection, accurately perceive its own state and external environment, autonomously control satellites to complete various tasks, improve the satellite’s autonomous mission planning capabilities in orbit, and reduce the risk of fatal satellite failures

Method used

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  • Method for autonomously and continuously planning satellite tasks
  • Method for autonomously and continuously planning satellite tasks
  • Method for autonomously and continuously planning satellite tasks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Embodiment 1: with figure 2 As shown, the satellite performs mission planning at time t0, and finds that the satellite will enter a specific area for work after 15 minutes. This is a short-term mission. At this time, analyze whether the resources and status of the satellite meet the mission start conditions. If so, it can be included in the new mission. task set P'. This mission needs to start the data transmission warm-up in advance, so the data transmission is turned on for warm-up 10 minutes before the mission execution. The time when the satellite enters the target control area is t1, which is the start time of the mission, and the payload equipment starts to start taking pictures. The moment when the satellite leaves the target control area is t2. At this time, the payload equipment is turned off, and the payload task ends. The work of the entire load task is driven by whether the satellite enters the target control area. The time length from t1 to t2 is 20 minut...

Embodiment 2

[0077] Embodiment 2: as image 3 As shown in , the satellite performs mission planning at a certain time t0, and plans the payload mission within 100 minutes. Assume that a load task with ID ZaiHeTask enters the target control area set G, and the start time is 99 minutes. At this time, it is a long-term task, which is directly included in the new task set P’. Every time the satellite performs mission planning between t0 and t1, the payload mission is a long-term mission, which is directly included in the new mission set P' until the time t1 is reached. At this time, when the task is planned, the starting time of the task becomes 60 minutes, and the task becomes a mid-term task. At this time, the task planning needs to be carried out in combination with the safety state of the whole satellite and the discharge depth of the satellite in the state set S. If the safety state of the whole star is If it is safe, and the discharge depth of the satellite is greater than the discharge...

Embodiment 3

[0080] Embodiment 3: Take the public resource "digital transmission" as an example, such as Figure 4 As shown, task 1 turns on data transmission at time T0 and turns off data transmission at time T2; task 2 turns on data transmission at time T1 and turns off data transmission at time T3. The execution process of the two tasks overlaps, and both use the "digital transmission" resource, and there is a resource conflict. If this resource conflict is not considered during task planning, and the two tasks are executed separately, for task 2, although the data transmission is turned on at T1, it is turned off by the command of task 1 at T2, so task 2 cannot work normally. implement. If the conflict resolution strategy is adopted, the task instructions can be adjusted during task planning, and the normal execution of the two tasks can be guaranteed without executing the "on data transmission" command of task 2 and the "off data transmission" command of task 1.

[0081] If two task...

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Abstract

The invention discloses a method for autonomously and continuously planning satellite tasks. The method comprises the steps: enabling a satellite to calculate executable tasks entering into a set G at a certain moment according to a satellite track and a target control region set G; enabling the tasks to be divided into a long-term task, a medium-term task and a short-term task through a hierarchical planning method; and judging whether the tasks can be set into a new task set P' or not according to a current state set S of the satellite. If there is resource conflict in the execution of a plurality of tasks, the conflict removal is carried to according to a preset rule. A current task set P is updated and remains consistent with the new task set P', and the short-term tasks, which arrive at the starting time, in the current task set P are extracted and sent to a real-time system for execution. Finally, a set G and a set S are updated. The method achieves that the satellite accurately senses the state and an external environment and is controlled to autonomously complete various types of task without depending on external control and information injection, improves the autonomous working capability of the satellite, and reduces the risk that a critical fault happens to the satellite.

Description

technical field [0001] The present invention proposes a method for autonomous and continuous planning of satellite missions, and particularly relates to a method for autonomously carrying out on-board load missions by using information such as the satellite's position, orbit, satellite discharge depth, illumination status, resource status, and satellite safety status independently obtained by the satellite. Continuous planning reduces ground intervention and control and enhances satellite reliability. Background technique [0002] At present, most of the on-orbit mission management of satellites still requires ground control. This kind of control has many factors that affect the safety and reliability of satellite in-orbit operation, specifically in the following aspects: [0003] 1. Earth observation satellites mostly use sun-synchronous orbits, which are characterized by short controllable arcs (more than ten minutes each time) and long effective control intervals (about 1...

Claims

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Application Information

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IPC IPC(8): G05D1/10
Inventor 李娟王旭李志刚
Owner AEROSPACE DONGFANGHONG SATELLITE
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