Recent content by viscousflow

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    Build Your Own Drone - A Guide for Beginners

    Here is a website dedicated to having a camera attached to your aerial vehicle and wireless telemetry for it (FPV): http://www.fpvpilot.com/Pages/GettingStartedinFPV.aspx Control system? Here is an easy off the shelf solution: http://www.diydrones.com/notes/ArduPilot/ Website to learn more...
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    Wing and wind turbine blade aerodynamic center?

    Well this has to be the case since the aerodynamic center you were given is the 2D aerodynamic center. The blade's true 3D aerodynamic center will change and will be along a new constant chord. You will have to recalculate the 3D AC or estimate it using CFD.
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    How to calculate quadrotor propeller torque due to aerodynamic drag

    Let me clarify a few things. You are simulating a quadrotor. You want to develop a non-linear Thrust model. Torque isn't particularly useful in your simulation unless you need to know if your motor can spin the prop without overheating. Your thrust model consists of a prop - motor combination...
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    Quadcopter without propeller (with hidden propeller)

    How can this be? Those things use a propeller to pull in the surrounding air and blow it through the structure which has an aerodynamic shape that directs it outward, hence major efficiency losses. So there is no way it could have more thrust than the thrust created from a direct drive system...
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    Simplifying a transfer function to find overshoot

    Err this should be poles, or roots of the denominator.
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    Simplifying a transfer function to find overshoot

    Based on your knowledge of control systems there are some really quick things you can determine! T(s) = \frac{15\left(s+2.1\right)}{\left(s+2\right)\left(s^2+4s+29\right)\left(s^2+2s+50\right)} Firstly T(s) = \frac{\left(s+2.1 \right)}{\left(s+2\right)} are really close so they can...
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    Model predictive control variable Cost function

    Cant you access system time and place a switch on the variable once the time meets conditions of day and night? Does it have to be only with the MPC toolbox?
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    Accelerometer tilt error correction

    You will have to mathematically rotate the accelerometer's frame to the gravity frame. You will have to measure the x-z and y-z angles that it is tilted by.
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    Navigation System of Autonomous UAV

    What sort of terrain are you operating in? Optical processing may be an option but that depends on your environment. Also the accuracy of GPS increases with the use of a WAAS capable receiver. It is possible to augment your 3d position with optical processing. (LIDAR, camera, IR camera, etc...)
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    Laplace transform of multiplication

    This sounds like a homework problem. Also if you'd like such detailed help, it would help us if you provide the details of your work, i.e. show your working.
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    Question about a PD controller.

    When placing your two right most poles using the gain kd, your left most pole will tend to move toward the zero position at some position specified by kd also. So if you're ignoring the left most pole only, then it has the same effect of ignoring both the left most pole and the zero, since the...
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    Calling all who successfully manage a busy schedule

    Lol. I'm sorry but I can't see this being true for any serious university student.
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    Understanding Drag and Coefficient of Drag (Cd) in Aero Engineering

    Search for an online tool called "Javafoil". Create your custom airfoil then search for a program called "XFLR" All freeware, these tools will get you the aerodynamic data you need.
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    Aerodynamics: Exploring Lift and its Formula

    Search for Buckingham's Pi Theorem.
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    Steady State Error of a PI Controlled System (parabolic input)

    1) try two transfer function blocks [1/s] in series. (Although I suspect what you're doing is equivalent) 2) It is correct, although there is PID controller block. 3) There is no model of D(s) given so you can assume nothing helpful. 4) Looks like you're on the right track but its too late...
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