Posted: 12/30/2009 11:46:41 AM EDT
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I thought I had this, then my brain vapor locked... http://asuwlink.uwyo.edu/~jimkirk/guidance.wav |
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Typical conehead speak. I hear it all the time. The important thing is to try to reduce the error between where the missile is to where it isn't to zero. But you never get to zero because error reduction is an asymptotic function.  true. alot of jargon that really comes down to eliminating the error as much as possible, like you stated. coincidentally, my older brother works for raytheon, on missile control systems out in Tuscon. I myself chose a different career path with my engineering degree. I do enjoy control systems though |
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Welcome to the Kalman filter... http://www.swarthmore.edu/NatSci/echeeve1/Ref/Kalman/images/MatrixSys4.gif He was probably describing a Kalman, correct. Kalman and various Kalman modifications are used for tracking and location prediction (for instance, in radar and other uses like security camera movement.) |
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Welcome to the Kalman filter... http://www.swarthmore.edu/NatSci/echeeve1/Ref/Kalman/images/MatrixSys4.gif He was probably describing a Kalman, correct. Kalman and various Kalman modifications are used for tracking and location prediction (for instance, in radar and other uses like security camera movement.) And don't forget the effects of the Schuler cycle on Kalman filtering. |
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Quoted: Strange I made it thought Navy Fire Control A school, Terrier missile school and Harpoon school and NEVER heard any crap like that. I kind of understand what he is getting at, but only a major egghead would try to explain it like that. It sounds as if someone is trying to make it out to be more impressive that it really is, it deter them from trying to take the speaker's job.  |
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Welcome to the Kalman filter... http://www.swarthmore.edu/NatSci/echeeve1/Ref/Kalman/images/MatrixSys4.gif He was probably describing a Kalman, correct. Kalman and various Kalman modifications are used for tracking and location prediction (for instance, in radar and other uses like security camera movement.) And don't forget the effects of the Schuler cycle on Kalman filtering. This is not my major area of study, but I don't see the relation. I guess it depends on the application, correct? For simple location prediction such as in radar or optical tracking, Kalman alone is probably all that's needed. For an inertial guidance system within a missile, yes, Schuler must be taken into account. |
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Strange I made it thought Navy Fire Control A school, Terrier missile school and Harpoon school and NEVER heard any crap like that. I kind of understand what he is getting at, but only a major egghead would try to explain it like that. It sounds as if someone is trying to make it out to be more impressive that it really is, it deter them from trying to take the speaker's job.
It sounds like he is reading the pseudocode of a program that makes the calculations. 
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Strange I made it thought Navy Fire Control A school, Terrier missile school and Harpoon school and NEVER heard any crap like that. I kind of understand what he is getting at, but only a major egghead would try to explain it like that. That's because you weren't involved with the design of a terrain following missile. And as a graduate of FC A, Mk92 C and the Aegis CSO course, I can say that the Navy doesn't teach FCs the inner workings of the missile itself. The closest I got was in the Aegis CSO course, they did explain proportional navigation and the inner details of the SM-2, but what I was supposed to gain out of that, tactically, I still haven't grasped. |
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Welcome to the Kalman filter... http://www.swarthmore.edu/NatSci/echeeve1/Ref/Kalman/images/MatrixSys4.gif He was probably describing a Kalman, correct. Kalman and various Kalman modifications are used for tracking and location prediction (for instance, in radar and other uses like security camera movement.) And don't forget the effects of the Schuler cycle on Kalman filtering. This is not my major area of study, but I don't see the relation. I guess it depends on the application, correct? For simple location prediction such as in radar or optical tracking, Kalman alone is probably all that's needed. For an inertial guidance system within a missile, yes, Schuler must be taken into account. Yes, Schuler cycle must be taken into account for aircraft inertial guidance. I doubt it would have much impact on a missile guidance since it would only be airborne a short time and the effects of the schuler cycle wouldn't have that much of an effect. And oh yeah: 
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Welcome to the Kalman filter... http://www.swarthmore.edu/NatSci/echeeve1/Ref/Kalman/images/MatrixSys4.gif He was probably describing a Kalman, correct. Kalman and various Kalman modifications are used for tracking and location prediction (for instance, in radar and other uses like security camera movement.) And don't forget the effects of the Schuler cycle on Kalman filtering. This is not my major area of study, but I don't see the relation. I guess it depends on the application, correct? For simple location prediction such as in radar or optical tracking, Kalman alone is probably all that's needed. For an inertial guidance system within a missile, yes, Schuler must be taken into account. Yes, Schuler cycle must be taken into account for aircraft inertial guidance. I doubt it would have much impact on a missile guidance since it would only be airborne a short time and the effects of the schuler cycle wouldn't have that much of an effect. And oh yeah: http://i146.photobucket.com/albums/r273/BaronJuJu/ogre.jpg The Schuler loop would only have an affect on missiles that fly through waypoints to get to a target or just fly to certain coordinates; missiles that use an IMU. Even then missile flights are so short compared to the 84 minute period of the Schuler loop it probably won't make a enough of a difference to throw off the terminal guidance based on optical or other tracking. If there is no terminal guidance, like a missile that flies to certain coordinates, then yeah it could make a difference. Missiles that use seekers in some form (optical, radar, strap-down or gimballed) for the entire flight don't even use accelerometers, it's all based on LOS rates. |