Recent content by guss

  1. G

    Electrical Building an Electronics Project: Radar Device Ideas

    Thanks for all the info. This project isn't due for a while, so I may have time. Going to spend more time looking into this stuff.
  2. G

    Electrical Building an Electronics Project: Radar Device Ideas

    No, I should have been more careful with my words, I'm not thinking about a specific frequency. I was thinking I could use some unregistered bands. I'm also open to making a receiver and transmitter from scratch just to do something simple like turn on an LED, etc. I found some circuits here...
  3. G

    Electrical Building an Electronics Project: Radar Device Ideas

    Hi all, For an applied electronics class I'm currently taking, we have to come up with and build an electronics project of our choosing from scratch. I think it would be cool to build some sort of radar device. I have been looking into phased array radars, radar speed detectors, etc., but a lot...
  4. G

    Firing an object into orbit using a moon's gravity

    I think so? http://en.wikipedia.org/wiki/Newton%27s_cannonball
  5. G

    Firing an object into orbit using a moon's gravity

    Let's say I'm on a planet and I have a space "gun" that can launch an object upwards at any speed in any direction. Typically with this, you could not launch an object without any rockets into orbit because the best you could do is make the object loop around the planet to exactly where it...
  6. G

    Solving Target Math w/ Drone: Max Thrust & Torque

    Ok, so here I am trying to figure out what angle the drone should aim at given the conditions. From there, we can work on the aiming and thrusting. So the time it takes to get to the target in the horizontal direction should be the same time in the vertical direction, and we can change the...
  7. G

    Solving Target Math w/ Drone: Max Thrust & Torque

    Yeah, exactly. I think that is a central issue -- when do we let the craft rotate into position and when do we fire the main thruster. Also, when do we thrust directly at the target and when do we thrust away (when we are moving too quickly to turn and hit it). You may have already been...
  8. G

    Solving Target Math w/ Drone: Max Thrust & Torque

    Here is a problem I've been trying to sort out and I can't get, I think it's kind of an interesting one. Imagine a drone and a target point on a 2d plane. There are eight parameters: P = my position Q = target's position V = my velocity I = my moment of inertia w = my angular velocity s...
  9. G

    Compute Impact Velocity Vector for Orbital Trajectory

    The moon is a vacuum for all practical purposes, especially at 50km altitude.
  10. G

    Compute Impact Velocity Vector for Orbital Trajectory

    I wanted a more exact result for that third option, and I couldn't derive a formula, so I did a simulation. It was actually much easier than I thought it was going to be, pretty cool as well. I got an impact speed of .3116 m/s in the straight down direction. Craft mass = 1.3kg (cubesat), F =...
  11. G

    Compute Impact Velocity Vector for Orbital Trajectory

    Let's say a craft is in an orbit at a height h above a planet or moon. A force acts directly against the craft's direction of motion so as the force vector is always parallel to the surface of the central body. So, the craft will slowly decelerate and impact the surface. What would be the best...
  12. G

    Are lunar landings without chemical rockets possible?

    If a satellite tries to land on the moon without rockets to counter the force of gravity, it comes in too fast and crashes into the surface destroying itself. A satellite would be orbiting at approximately 1.8 km/s or so at a 50km altitude, and come in for landing from that height which would...
  13. G

    Phased Array Radar: Scanning Volumes of Space Accurately Per Second

    Thanks! I will read the tutorials. It seems to me like radar is the way to go here, since phased array comes with redundant reliability and no need to mechanically steer the parts. I believe that I should be able to detect small objects at longer ranges without too much of a hassle, as well...
  14. G

    Phased Array Radar: Scanning Volumes of Space Accurately Per Second

    Ok, thanks. I am a bit more informed now after reading those. So, the radar beam would be steered, and when an object is detected, the beam could be focused to get more accurate readings. From my understanding, this is possible. I still have some questions, though. It seems to me a very small...
  15. G

    Phased Array Radar: Scanning Volumes of Space Accurately Per Second

    Let's say I want to use a phased array detector on a satellite to detect other objects in space. The radar would need to be able to detect objects .5cm or larger, and would have to get an accurate read on their position (within 10-15 m). From there, the goal would be to maximize the volume of...
Back
Top