Low earth orbit satellite command planning device and method, and low earth orbit satellite control system including the same

• US 20060136103A1
• Filed: 09/26/2003
• Published: 06/22/2006
• Est. Priority Date: 11/28/2002
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Seong-Pal, Lee, Jeong-Sook, Kim, Jae-Hoon, Mo, Hee-Sook, Lee, Byoung-Sun
• Granted Patent: US 7,542,829 B2
• Time in Patent Office: Days
• US Class Current: 701/13
• CPC Class Codes: B64G 1/24 Guiding or controlling apparatus, e.g. for attitude control
• CPC Class Codes: B64G 1/242 Orbits and trajectories
• CPC Class Codes: B64G 3/00 Observing or tracking cosmonautic vehicles
• CPC Class Codes: H04B 7/18519 Operations control, administration or maintenance

Abstract

Disclosed is a command planning apparatus of a low-earth orbit satellite, and a low-earth orbit satellite control system including the same. The present invention automates the process of executing the command plan for converting the satellite task schedule planned on the ground into telecommands available by the satellite in the low-earth orbit satellite control system, and automatically selects a data set established by the parameters related to the execution task of the satellite according to the mapping rule.

Claims

1. In an apparatus for analyzing orbit and attitude data of a low-earth orbit satellite to establish a task schedule, and generating a satellite command, a low earth orbit satellite command planning apparatus comprising:

a satellite event predictor for predicting various events related to the satellite;

a satellite task schedule planner for referring to the event to schedule a task schedule of the satellite, and establishing a satellite task schedule;

a satellite telecommand planner for generating a set of telecommand data to be executed by the satellite according to the satellite task schedule established by the satellite task schedule planner; and

a mapping rule applier including a plurality of mapping rules applied to the respective task schedules of the satellite.

2. The apparatus of claim 1, wherein the respective satellite tasks of the satellite task schedule established by the satellite task schedule planner include an ID, an execution time, and a parameter, and

the satellite telecommand planner compares the parameter condition with mapping rules of the mapping rule applier, and automatically generates a set of satellite commands corresponding to the mapping rules matched with the condition.

3. The apparatus of claim 1, further comprising a first user interface for establishing the mapping rules, and wherein

the first user interface comprises:

a list display for displaying a mapping rule list;

an information display for a mapping rule name, a task name to which the mapping rule is applied, and a relative time command sequence; and

a condition display for displaying a mapping condition according to a parameter of the task, and

the mapping condition includes a plurality of logical operation conditions and comparison conditions.

4. The apparatus of claim 3, wherein the logical operation conditions and comparison conditions include a logical product (AND), a logical sum (OR), an equal sign (=), a greater than sign (>

), and a less than sign (<

).

5. The apparatus of claim 3, further comprising a second user interface for defining the relative time command sequence and wherein

the second user interface comprises:

a list display for displaying a relative time command sequence list;

a command display for displaying a list of commands that can be added to a name of the relative time command sequence; and

a command sequence display for displaying a set of commands included in the name of the relative time command sequence; and

wherein

the second user interface selects the command included in the command display and edits a command set sequence of the command sequence display.

6. A satellite command planning method for a satellite control system to generate a satellite command from a satellite task schedule, comprising:

(a) comparing a satellite task included in a plurality of satellite task schedules with a predefined mapping rule when the satellite task schedules are input;

(b) generating a set of commands defined by a corresponding mapping rule when the mapping rule corresponding to a condition of the satellite task is found after the comparison, and comparing a next satellite task with a next mapping rule when no mapping rule corresponding to the satellite task is found;

(c) generating a preliminary satellite command plan based on the generated set of satellite commands; and

(d) inserting a satellite command indicator additionally needed for the satellite command, and generating a final command plan.

7. The method of claim 6, wherein a single mapping rule includes a plurality of sets of satellite commands in (b), and (b) comprises selecting a single set of satellite commands corresponding to a parameter of the satellite task from among the sets of satellite commands.

8. In a control system for monitoring and controlling a low earth orbit satellite, a LEO (low earth orbit) satellite control system comprising:

an antenna for executing radio communication with the satellite;

a satellite operating system for receiving a telemetric signal of the satellite, processing and analyzing the signal, and transmitting a telecommand signal to the satellite through the antenna;

a task analysis and planning system for analyzing orbit and attitude data of the satellite to establish a task schedule, and applying a plurality of mapping rules according to the established task schedule to generate a set of telecommand data; and

an interface for transmitting and receiving data between the systems.

9. The LEO satellite control system of claim 8, wherein the task analysis and planning system comprises:

a satellite event predictor for predicting various events related to the satellite;

a satellite task schedule planner for referring to the event to schedule a task schedule of the satellite, and establishing a satellite task schedule;

a satellite telecommand planner for generating a set of telecommand data to be executed by the satellite according to the satellite task schedule established by the satellite task schedule planner; and

a mapping rule applier including a plurality of mapping rules applied to the respective task schedules of the satellite.

10. The LEO satellite control system of claim 8, wherein the satellite operating system comprises:

a signal transmit/receive converter for receiving a telemetric signal of the satellite and transmitting a telecommand signal to the satellite through the antenna;

a satellite telesurveillance unit for processing and analyzing the telemetric signal received from the satellite to monitor the states of the satellite; and

a satellite telecommand transmitter for transmitting a control command required for the satellite.