Synthetic Deviation Correction Method for Tracking Satellite of the SOTM Antenna on High Maneuverability Carriers

Abstract

Using Satcom-On-The-Move (SOTM) antenna on moving carriers to track communication satellites is a rapidly developing technology. The normal running of the SOTM system requires its antenna beam to track the target communication satellite accurately at all times. However, due to the errors of the measurement system, tracking deviation will inevitably occur, especially when the moving carrier is in ahigh maneuvering state, which may cause communication failures. In this paper, we propose a synthetic deviation correction algorithm; when the carrier is in the high maneuvering state, the measurement error is converted into the deviation of the azimuth as well as the pitch of the antenna that needs to be corrected to correct the pointing of the SOTM antenna. Finally, the proposed algorithm is verified by experiments. The experimental results show that the proposed algorithm has a good isolation effect on the high maneuverability of the carrier, which means that the pointing to the communication satellite is more accurate and achieves better communication quality under the high maneuvering state. The effectiveness of the algorithm is illustrated.

Multi-Beam Satellite Seeking and Acquisition Method for Satcom-on-the-Move Array Antenna on a High Maneuverability Carrier

“…To fully validate the design scheme of this paper, the experiment is divided into the following two experiments: The angles of the yaw, pitch, and roll of the swing platform run in a sinusoidal manner with a period of 3 s; the maximum angular velocity is 31.4159 • /s, and the maximum angular acceleration is 65.7974 • /s 2 . From reference [27], when the maximum angular velocity is greater than 30 • /s or the maximum angular acceleration is greater than 40 • /s 2 , the swing platform may be in a high maneuvering state during the experiment.…”

“…Due to the carrier's motion, its location and attitude are constantly changing [26], and current methods can meet the satellite tracking requirements of array carriers in general motion states. However, when the carrier's attitude changes beyond certain conditions, from reference [27], this condition is generally described as angular velocity ω > 30 • /s, or angular acceleration α > 40 • /s 2 , conventional methods may cause a decline in the communication effectiveness of the SOTM system and even cause the antenna to lose the tracking of the satellite and interrupt the communication. After the antenna loses the communication satellite, reacquisition relies on the antenna beam scanning and mechanical tracking system azimuth and elevation axis movements, which increases the time it takes to reacquire the satellite.…”

Rapid Tracking Satellite Servo Control for Three-Axis Satcom-on-the-Move Antenna

“…Satcom-on-the-move (SOTM) plays an important role in satellite communications, which focuses on realizing real-time satellite communications during the motion of the carrier [1][2][3][4]. Through the SOTM system, carriers such as vehicles, ships and aircrafts can realize the continuous transmission of multimedia information such as data, voice, images and videos through satellites as relays during the movement, which can play an important role in many civil and military fields.…”