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

• US 7,542,829 B2
• Filed: 09/26/2003
• Issued: 06/02/2009
• Est. Priority Date: 11/28/2002
• Status: Expired due to Fees

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Jeong-Sook, Kim, Jae-Hoon, Lee, Seong-Pal, Mo, Hee-Sook, Lee, Byoung-Sun
• Primary Examiner(s): Black; Thomas G
• Assistant Examiner(s): Kong; Sze-Hon
• Application Number:
  US10/536,601
• Publication Number:
  US 20060136103A1
• Time in Patent Office: 2,076 Days
• Field of Search: 701/11, 701/13, 701/120
• 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 predicted various events and to inputted satellite tasks to schedule 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;

a mapping rule applier including a plurality of mapping rules applied to the respective inputted satellite tasks of the satellite;

a first user interface for applying a mapping rule in accordance to a satellite task name and a parameter condition; and

a second user interface for selecting desired commands from a list of available commands to define a relative time command sequence in the satellite task schedule.

2. The apparatus of claim 1, wherein 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, wherein the first user interface establishes the mapping rules such that the first user interface comprises:

a list display for displaying a mapping rule list;

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

a condition display for displaying a mapping condition in accordance to the parameter condition of the satellite task name, 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, wherein the second user interface defines the relative time command sequence such that the second user interface comprises:

a list display for displaying the list of available commands;

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

a command sequence display for displaying the selected commands included in the relative time command sequence; and

wherein the second user interface selects desired commands and edits the relative time command sequence of the command sequence display.

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

predicting, using a task analysis and planning system (TAPS), various satellite events;

applying, using a first user interface, a mapping rule in accordance to a satellite task name and a parameter condition;

comparing, using the TAPS, a satellite task included in a plurality of satellite task schedules with the predefined mapping rule when the satellite task schedules are input into the TAPS;

generating, using the TAPS, 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;

planning, using the TAPS, a preliminary satellite command plan based on the predicted various satellite events and the generated set of satellite commands;

selecting, using a second user interface, desired commands from a list of available commands to define a relative time command sequence in the satellite task schedule; and

inserting, using the TAPS, a satellite command indicator additionally needed for the satellite command from the preliminary satellite command plan to establish a finalized telecommand plan.

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

11. The method of claim 6 further comprising sending through an ethernet the telecommand plan to a satellite operating system (SOS).

12. The method of claim 11 further comprising transmitting the telecommand plan to a Low Earth Orbit (LEO) satellite.

13. The method of claim 6 wherein the predicting step is performed with a satellite event predictor of the TAPS.

14. The method of claim 6 wherein the generating step is performed with a satellite task schedule planner of the TAPS.

15. The method of claim 6 wherein the planning step is performed with a satellite telecommand planner of the TAPS.

16. The method of claim 6 wherein the inserting step is performed with a satellite telecommand planner of the TAPS.

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 (TAPS) for analyzing orbit and attitude data of the satellite, for predicting various satellite events, and for inputting satellite task schedules to establish a finalized telecommand plan by applying a plurality of mapping rules according to the established task schedule to generate a set of telecommand data;

a first user interface for applying a mapping rule in accordance to a satillite task name and a parameter condition;

a second user interface for selecting desired commands from a list of available commands to define a relative time command sequence in the satellite task schedule; and

an interface for transmitting and receiving data between the systems.

9. The LEO satellite control system of claim 8, wherein the TAPS comprises:

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

a satellite task schedule planner for referring to the predicted various events and to inputted satellite tasks to schedule 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 inputted satellite tasks 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, corresponding to the finalized telecommand plan, 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.