JPH04109186A - Antenna driving device - Google Patents

Abstract

PURPOSE:To quickly perform the tracking recovery action after a target passes the target tracking impossible region by providing a tracking impossible region avoiding action section, and controlling the switching of the routine first tracking mode and the second tracking mode in the tracking impossible region. CONSTITUTION:A controller 10 outputs a drive signal to a driving system 16 to control the direction of an on-board antenna 13 in the routine first tracking mode so that the directing error becomes 0. In the first tracking mode, a tracking impossible region avoiding action section 17 judges the presence of the tracking impossible region avoiding action of the antenna 13 based on orbit elements, if it judges that a target enters the region, it sends an avoidance signal to the controller 10 to set the antenna angle to the initial position, when the controller 10 detects that the target is entered the region, it switches the first tracking mode to the second tracking mode to match the antenna angle to the tracking target, when the antenna angle matches, the controller 10 again switches the second tracking mode to the first tracking mode. The tracking recovery action of the antenna 13 after the target passes the tracking impossible region can be quickly performed regardless of the rotation limit and driving speed of the system.

Description

[Detailed Description of the Invention] [Purpose of the Invention (Industrial Application Field) The present invention relates to an antenna drive device used for controlling the orientation of an onboard antenna of a space vehicle, including an artificial satellite, toward a target direction. .

(Prior Art) Generally, in this type of antenna driving device, as shown in FIG. A drive signal is generated so that the antenna angle of the mounted antenna 4 detected by the angle detection unit 3 matches the tracking target direction angle calculated by the target angle calculation unit 6 based on the trajectory element from the trajectory calculation unit 5. 2 drive signals are generated. The control unit 1 is the first
In the tracking mode, the drive mechanism 7 is driven and controlled by the first drive signal to reduce the antenna pointing error of the mounted antenna 4 to "0".
In the second tracking mode, the drive mechanism 7 is driven and controlled by the second drive signal to match the antenna angle of the mounted antenna 4 with the tracking target direction angle. The mode is usually the second tracking mode, in which the target direction is first roughly directed, and then the target direction is steadily tracked in the first tracking mode.

However, in the above-mentioned antenna driving device, due to the performance of the tracking error detection unit 2, in the first tracking mode in which the antenna pointing error is set to 0°, the target passes near the zenith of a spacecraft (not shown). When the target is in an impossible region such as when This problem arises due to factors such as speed and rotation limits, and it is difficult to quickly recover from tracking once the target has moved out of the range where it is impossible to track the target.

Therefore, as a means to avoid the above problem, it is conceivable to quickly perform the tracking recovery operation, for example, by a command from the ground.

However, with the above means, a problem arises in that the operational burden on the ground increases.

(Problems to be Solved by the Invention) As described above, the conventional antenna drive device has a problem in that it is difficult to quickly recover tracking after passing through a region where target tracking is impossible.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an antenna drive device that has a simple configuration and is capable of realizing a quick tracking recovery operation after passing through an area where target tracking is impossible. .

[Structure of the Invention] (Means for Solving the Problems) This invention generates a first antenna drive signal based on the pointing error between the tracking target and the onboard antenna, and generates a first antenna drive signal based on the antenna angle and orbital elements of the spacecraft. an antenna control means for generating a second antenna drive signal, and a first tracking mode for reducing the antenna pointing error of the mounted antenna to "0" in response to the first antenna drive signal generated by the antenna control means. and an antenna driving means driven in a second tracking mode to match the antenna angle of the mounted antenna with the tracking target direction in response to a second antenna drive signal;
In the first tracking mode of the antenna driving means, it is determined whether or not the mounted antenna is performing an operation to avoid an untrackable area based on the trajectory element, and when it is determined that the target enters the untrackable area, the The antenna angle of the onboard antenna is set to the initial setting position, and the antenna angle of the onboard antenna is controlled to match the tracking target direction in the second tracking mode, and in the matched state, the antenna angle is set to the first position again.
an antenna drive device comprising an untrackable area avoidance operation means for switching and controlling a tracking method by sending an untrackable area avoidance signal to the antenna control means to cause the mounted antenna to perform a tracking operation in a tracking mode of This is what I did.

(Function) According to the above configuration, in the first tracking mode, the antenna control means prevents tracking from the untrackable area avoidance operation means when the untrackable area avoidance operation means detects the untrackable area. By inputting the possible area avoidance signal, the antenna angle of the onboard antenna is set to the initial setting position, and then the antenna driving means is driven in the second tracking mode to match the antenna angle of the onboard antenna with the tracking target direction. When they match, the mode is switched back to the first tracking mode and the direction is controlled toward the target. Therefore, after passing through the non-tracking area, a quick tracking recovery operation in the first tracking mode is realized without being affected by performance such as drive speed responsiveness or rotation limit of the antenna drive means.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an antenna driving device according to an embodiment of the present invention, in which a control section 10 includes a target angle calculation section 12 which calculates a tracking target direction angle signal based on trajectory elements calculated by a trajectory calculation section 11. , the output end of the tracking error detection unit 14 that detects the antenna pointing error of the mounted antenna 13 and outputs an antenna pointing error signal, and the output end of the angle detection unit 15 that detects the antenna angle of the mounted antenna 13 are connected. be done.

The control unit 10 generates a first drive signal constituting a first tracking mode in which tracking is performed so that the antenna pointing error of the mounted antenna 13 is set to “0” based on the antenna pointing error signal from the tracking error detecting unit 14. and target angle calculation section 12
generates a second drive signal constituting a second tracking mode in which the antenna angle is tracked to match the tracking target direction angle based on the tracking target direction angle signal from the tracking target direction angle signal and the antenna angle signal from the angle detection unit 15; , these first and second drive signals are outputted to the drive mechanism 16 from the output end. The drive mechanism 16 controls the orientation of the mounted antenna 13 in the target direction in response to the input first and second drive signals.

Further, an output end of an untrackable area avoidance operation unit 17 is connected to the control unit 10.
A trajectory calculation section 11 is connected to the input terminal of the . In the first tracking mode, the untrackable area avoidance operation unit 17 determines whether there is an untrackable area avoidance operation based on the input trajectory elements and antenna pointing error, and performs the untrackable area avoidance operation when it is determined that it is necessary. A possible area avoidance signal is output to the control unit 10. In response to the untrackable area avoidance signal, the control unit 10 sets the antenna angle of the mounted antenna 13 to the initial setting position, switches from the first tracking mode to the second tracking mode, and outputs the second drive signal. This second drive signal is output to the drive mechanism 17, and when the antenna angle matches the tracking target direction angle, the mode is switched to the first tracking mode again and the first drive signal is generated. and outputs it to the drive mechanism 17.

In the above configuration, the control unit 10 generates the first drive signal such that the pointing error becomes “0” in response to the pointing error signal from the tracking error detection unit 14 in the steady first tracking mode. and outputs it to the drive mechanism 17. The drive mechanism 17 performs tracking to control the pointing direction of the mounted antenna 13 in response to the input first drive signal. In such a steady first tracking mode, the untrackable area avoidance operation unit determines whether or not the onboard antenna 13 should perform an untrackable area avoidance operation based on the input trajectory elements, and determines whether the target is in the untrackable area. In the state where it is determined that the tracking area has entered, an untrackable area avoidance signal is output to the control unit 10. Then, the control unit 10 controls the antenna angle of the mounted antenna 13 to the initial setting position.

When the untrackable area avoidance operation unit 17 detects that the target has entered the untrackable area, it switches to a second tracking mode in which the antenna angle of the mounted antenna 13 is made to match the direction of the tracked target. In this second tracking mode,
When the antenna angles of the onboard antenna 13 are tracked and matched, the untrackable area avoidance operation unit 17 switches the control unit 10 to the first tracking mode again, and the onboard antenna 1
Tracking is performed with the pointing error of 3 as '0''.

In this way, the antenna driving device includes the untrackable area avoidance operation section 17 that detects the untrackable area based on the trajectory element and the pointing error signal and generates the untrackable area avoidance signal.
After setting the antenna angle of the mounted antenna 13 to the initial setting position based on the untrackable area avoidance signal from the untrackable area avoidance operation unit 17, the control unit 10 is switched from the first tracking mode to the first tracking mode. The antenna angle is controlled to match the tracking target direction by switching to the second tracking mode, and in the matched state, the controller 10 is switched again to return to the original first tracking mode. According to this,
In the first tracking mode, the tracking recovery operation after the mounted antenna 13 has passed through the non-tracking area can be performed quickly regardless of the performance of the drive mechanism 16, such as its rotational limit or drive speed.

Note that this invention is not limited to the above embodiments, but also includes
Of course, various modifications can be made without departing from the spirit of the invention.

[Effects of the Invention] As described in detail above, the present invention provides an antenna drive device that has a simple configuration and is capable of realizing a quick tracking recovery operation after passing through an area where target tracking is impossible. I can do it.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an antenna driving device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional antenna driving device. 10...Control unit, 11...Trajectory calculation unit, 12...
Target angle calculation section, 13... Mounted antenna, 14... Tracking error detection section, 15... Angle detection section, 16... Drive mechanism, 17... Untrackable area avoidance operation section. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] An antenna that generates a first antenna drive signal based on a pointing error between a tracking target and an onboard antenna, and generates a second antenna drive signal based on an antenna angle and an orbital element of a spacecraft. a control means; and an antenna pointing error of the mounted antenna in response to a first antenna drive signal generated by the antenna control means.
0'' and a second tracking mode in which the antenna angle of the mounted antenna matches the tracking target direction in response to a second antenna drive signal; In the first tracking mode of the antenna driving means, it is determined whether or not the mounted antenna is performing an operation to avoid an untrackable area based on the trajectory element, and when it is determined that the target enters the untrackable area, the The antenna angle of the onboard antenna is set to the initial setting position, and the antenna angle of the onboard antenna is controlled to match the tracking target direction in the second tracking mode, and in the matched state, the antenna angle is set to the first position again.
The vehicle is characterized by comprising: untrackable area avoidance operation means that sends an untrackable area avoidance signal to the antenna control means to perform tracking operation of the mounted antenna in the tracking mode of , and controls switching of the tracking method. Antenna drive device.