fixed internally AIM-120 Snapping and oscillations when (re-)acquiring target

[Default774]

The AIM-120 exhibits snapping behaviour when acquiring targets when either extrapolating/on INS. The missile will aggressively snap to the target as soon as the seeker (re)aqcuires the target. In high altitude situations the missile snaps to target and doesnt oscillate. At lower altitudes the missile snaps to target, and also starts oscillating as it tries to guide onto the target, sometimes missing due to this. This behaviour occurs most often when either reacquiring a target when it leaves the notch or more commonly when the missile acquires a target off of INS. If the target deviates from the predicted path of the target and the seeker still acquires it, the missile will snap to the target aggressively. 

 

120_y2.acmi 120_y1.acmi 120_y2.trk 120_y1.trk

Edited November 13, 2022 by Minimalist

[Default774]

Addendum to this, original tracks no longer work in the newest OB version as the 120 seeker behaviour seems to have changed. The missile no longer loses track initially in the above tracks so there is obviously no reaqcuisition to snap off of. Thankfully, I've managed to reproduce the snapping off of INS in the newest OB version.

120_t2.trk 120_t3.acmi 120_t1.acmi 120_t2.acmi 120_t1.trk 120_t3.trk

Edited November 18, 2022 by Minimalist

[Маэстро]

Seems like something had broken, will investigate. Thanks.

[Default774]

Additional edge case track for the initial oscillations mentioned. Test was performed over land so the missile can lose track as notching is virtually impossible over water now. Missile acquires very late in flight, probably too late to respond properly and still hit. Nonetheless, the oscillations/snapping are present. 

120_a1.trk 120_a1.acmi

Edited November 27, 2022 by Minimalist

[Маэстро]

This issue already fixed internally