Missile safety control method after image seeker unlocking

Abstract

The application discloses a kind of image guide head unblock post-missile safety control method, first improvement tracking algorithm, enhance the ability of target recapture after unblock, improve tracking reliability, reduce the risk of missile out of control;In launch after regardless of mode, shooter does not carry out any intervention to missile, such as appears short-term unblock, then the pitch, yaw line-of-sight angular velocity rate output by guide head after unblock keeps the state before unblock, if more than a certain time fails to recapture target, then it is regarded as tracking failure;If tracking failure and autonomous identification failure and last for a certain time, then start down pressure instruction, control missile to explode on the trajectory line near target.In missile self-borne image transmission mode, shooter uploads instruction operation guide head by image transmission system, directly corrects aiming point in guide head automatic tracking state, relocks or changes attack target, and missile automatically flies to target;The application does not additionally increase hardware, so it is simple to operate, low in cost.

Description

Technical Field

[0001] This invention belongs to the field of missile design technology, specifically relating to a missile safety control method after an image seeker is unlocked. Background Technology

[0002] For image-guided missiles, the complexity of the target's background environment often leads to seeker head lock-up issues, which is a major reason why missiles fail to hit their targets. After a seeker head lock-up occurs, it is necessary to consider how to safely control the missile to avoid safety issues such as accidental detonation due to loss of control. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides a missile safety control method after the image seeker loses lock. Firstly, it improves the tracking algorithm, enhancing the ability to re-acquire the target after lock-up, improving tracking reliability, and reducing the risk of missile loss of control. In fire-and-forget mode, the shooter does not intervene in the missile. If a brief lock-up occurs, the pitch and yaw line-of-sight rates output by the seeker remain at their pre-lock-up state. If the target cannot be re-acquired within a certain time, it is considered a tracking failure. If tracking and autonomous identification both fail for a certain period, a downward pressure command is initiated, controlling the missile to detonate on its trajectory near the target. In missile-borne image transmission mode, the shooter uploads commands to operate the seeker via the image transmission system, directly correcting the aiming point and relocking or changing the target while the seeker is automatically tracking. The missile then automatically flies towards the target. This invention does not require additional hardware, therefore it is simple to operate and low in cost.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows:

[0005] Step 1: In fire-and-forget mode, the gunner does not intervene in the missile. If a brief lock-up occurs, the pitch and yaw line-of-sight rates output by the seeker will remain in the state before the lock-up. If the target cannot be reacquired within a certain time, it is considered a tracking failure. At this time, the flight control system puts the seeker in the unlocked state, combines the target position information and the missile attitude and position information provided by the missile's onboard inertial measurement unit to perform closed-loop flight, calculates the seeker frame angle, and points the seeker optical axis toward the target. If the target reappears in the field of view, the seeker will relock onto the target through its autonomous identification function, and the missile will automatically fly toward the target.

[0006] Step 2: In fire-and-forget mode, the shooter does not intervene in the missile. If tracking and autonomous identification fail and continue for a certain period of time, the downward pressure command is initiated to control the missile to detonate on the ballistic line near the target.

[0007] Step 3: In missile-borne image transmission mode, the shooter transmits commands to the seeker via the image transmission system to operate the seeker head. The aiming point is corrected directly in automatic tracking mode, the target is relocked or changed, and then the aiming point correction mode is exited, switching to automatic tracking mode. The missile then automatically flies towards the target. If the gate position is out of control or unlocked, and the distance between the gate and the target exceeds the set distance, the seeker head is first switched from automatic tracking mode to manual tracking mode to lock the gate onto the target. Then, it is switched back to automatic tracking, exiting the aiming point correction mode and switching to automatic tracking mode. The missile then automatically flies towards the target, ensuring missile launch and flight safety.

[0008] The beneficial effects of this invention are as follows:

[0009] This invention employs different safety strategies in both fire-and-forget and fire-and-forget modes to avoid unsafe situations such as missile malfunction and accidental detonation. It does not require additional hardware, making it simple to operate and inexpensive. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the missile launch used in this invention.

[0011] Figure 2 This is a schematic diagram of the aiming point correction method used in this invention. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] This invention discloses a missile safety control technology after the image seeker of a small missile loses lock. The missile system includes subsystems such as the missile and the launch platform. The missile includes an image seeker and an onboard image transmission system, while the launch platform includes a ground (vehicle-mounted) image transmission system and a display and control device. For image-guided missiles that lock before launch, are launch-and-forget, and can be controlled if desired, the missile will become uncontrollable after the seeker loses lock. The technical problem to be solved is: how to safely control the missile after the seeker loses lock, relock or change the target, or activate an emergency safety strategy to detonate the missile near the target.

[0014] First, the tracking algorithm is improved to enhance the ability to re-acquire the target after unlocking, thereby increasing tracking reliability and reducing the risk of missile loss of control. In fire-and-forget mode, the gunner does not intervene in the missile. If a brief unlock occurs, the pitch and yaw line-of-sight rates output by the seeker remain at their pre-unlocking state. If the target cannot be re-acquired within a certain time, it is considered a tracking failure. At this time, the flight control system puts the seeker in the unlocked state and performs (simulated) closed-loop flight by combining the target position information and the missile attitude and position information provided by the onboard inertial measurement unit. The seeker frame angle is calculated, and the seeker optical axis is pointed towards the target. If the target reappears in the field of view, the seeker's autonomous recognition function re-locks onto the target, and the missile automatically flies towards the target.

[0015] In fire-and-forget mode, the shooter does not intervene in the missile. If tracking and autonomous identification fail and continue for a certain period of time, the shooter initiates a pressure command to control the missile to detonate on its trajectory near the target.

[0016] In missile-borne image transmission mode, the shooter transmits commands to the seeker via the image transmission system, directly correcting the aiming point, relocking or changing the target while the seeker is in automatic tracking mode. Then, the shooter exits the aiming point correction mode and enters automatic tracking mode, and the missile automatically flies towards the target. If the seeker loses control at an inconspicuous gate position or is far from the target after unlocking, the seeker can first be switched from automatic tracking mode to manual tracking mode to press the gate against the target, then switched back to automatic tracking. After that, the shooter exits the aiming point correction mode and enters automatic tracking mode, and the missile automatically flies towards the target, ensuring the safety of missile launch and flight.

[0017] Example:

[0018] 1) such as Figure 1 As shown, missiles can be launched from vehicles or by carrier. A missile system includes subsystems such as the missile and the launch platform. The missile includes an image seeker and an onboard image transmission system, while the launch platform includes ground (vehicle-mounted) image transmission systems and display and control devices.

[0019] 2) such as Figure 2 As shown, for image-homing guided missiles that are locked before launch, do not care after launch, and can still be controlled if desired, the missile will go out of control after the seeker loses lock. The technical problem that needs to be solved is how to perform safe control after the seeker loses lock, relock or change the attack target, or activate emergency safety strategies to detonate the missile near the target.

[0020] 3) First, the tracking algorithm must be improved to enhance the ability to re-acquire the target after unlocking, thereby increasing tracking reliability and reducing the risk of missile loss of control. In fire-and-forget mode, the gunner does not intervene in the missile. If a brief unlock occurs, the pitch and yaw line-of-sight rates output by the seeker remain at their pre-unlocked state. If the target cannot be re-acquired within a certain time, it is considered a tracking failure. At this time, the flight control system puts the seeker in the unlocked state and performs (simulated) closed-loop flight by combining the target position information and the missile attitude and position information provided by the onboard inertial measurement unit. The seeker frame angle is calculated, and the seeker optical axis is pointed towards the target. If the target reappears in the field of view, the seeker's autonomous recognition function re-locks onto the target, and the missile automatically flies towards the target.

[0021] 4) In fire-and-forget mode, the shooter does not intervene in the missile. If tracking and autonomous identification fail and continue for a certain period of time, the shooter will initiate a pressure command to control the missile to detonate on the ballistic line near the target.

[0022] 5) In missile-borne image transmission mode, the shooter transmits commands through the image transmission system to operate the seeker head, directly correcting the aiming point in the seeker head's automatic tracking state, relocking or changing the target, and then exiting the aiming point correction mode and switching to automatic tracking mode, where the missile automatically flies towards the target. If the seeker head loses control at an inconspicuous gate position or is far from the target after unlocking, the seeker head can first be switched from automatic tracking mode to manual tracking mode to press the gate against the target, then switched back to automatic tracking, exiting the aiming point correction mode and switching to automatic tracking mode, where the missile automatically flies towards the target, ensuring missile launch and flight safety.

Claims

1. A missile safety control method after image seeker unlocks, characterized in that, Including fire-and-forget mode and missile-borne image transmission mode: In fire-and-forget mode, the gunner does not intervene in the missile. If a brief lock-up occurs, the pitch and yaw line-of-sight rates output by the seeker remain at their pre-lock-up state. If the target cannot be reacquired within a certain time, it is considered a tracking failure. At this time, the flight control system puts the seeker in the unlocked state, combines the target position information and the missile attitude and position information provided by the onboard inertial measurement unit to perform closed-loop flight, calculates the seeker frame angle, and points the seeker optical axis towards the target. If the target reappears in the field of view, the seeker's autonomous identification function relocks the target, and the missile automatically flies towards the target. If tracking and autonomous identification fail and continue for a certain period of time, a downward pressure command is initiated to control the missile to detonate on the ballistic line near the target. In missile-borne image transmission mode, the shooter transmits commands to the seeker via the image transmission system, directly correcting the aiming point, relocking or changing the target while the seeker is in automatic tracking mode. Then, the shooter exits the aiming point correction mode and enters automatic tracking mode, and the missile automatically flies towards the target. If the gate position is out of control or unlocked and the distance between the gate and the target exceeds the set distance, the seeker is first switched from automatic tracking mode to manual tracking mode to press the gate against the target. Then, the seeker switches back to automatic tracking, exits the aiming point correction mode, and enters automatic tracking mode, and the missile automatically flies towards the target, ensuring the safety of missile launch and flight.

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