Robotics and drones

Uav
Cockroaches have an inbuilt ability to stabilize their frame in a severe obstacle environment. Quad_frames and Vibration  is the preferred solution for building a quad copter due to its high frequency vibration attenuation  ability with wire rope. Attempting to implement control stability with only a plastic frame and Kalman math algorithms isn't possible as the IMU gyro saturation at its resonant frequency of 8khz is to severe. The wirerope creates a mechanical low pass filter, it is impossible to eliminate all vibration, like it isn't possible to eliminate all harmonics in a power supply. No wire rope was one of 3drobotics Solo failure contributing factors. Consumers expect a slick all plastic design, which would be like imagine all consumers insisting on square wheels instead of round from vehicle manufacturers. Copy the Quad frames flexacopter wire-rope and DJI Wookong IMU on aluminium block idea for the Vibration problem. Drive the electric motors at 20khz above the range of human hear with PWM. Existing boards drive motors at 4khz to conserve power, but it makes a noise within the human hearing range.
 * Diydrones arducopter Preferred for Quad frames and helicopter.
 * Gentlenav Matrixpilot was the preferred fixed wing solution, diydrones with VTOL for aircraft should be used.
 * Openpilot Had the lead, but arducopter took the lead.
 * Virtual robotics Quad IMU in cooperation with diydrones.
 * Multiwii quad FreeIMU code project
 * Vibration Reducing vibration to the IMU by creating a low pass mechanical filter, preventing IMU saturation at 8khz.
 * ESC_speed_control the Pixhawk autopilot solution.
 * https://github.com/PX4/Flow PX4 FLOW is a smart camera processing optical flow directly on the camera module. It is optimized for processing and outputs images only for development purposes. Its main output is a UART or I2C stream of flow measurements at ~400 Hz. Project: http://px4.io/modules/px4flow Dev guide / toolchain installation: http://px4.io/dev/px4flow

Uav airframes

 * Uav airframes
 * Gimbal
 * Antenna tracking
 * Uav robotics
 * Quad frames
 * Electromagnet use electromagnet to pick up objects.

Uav and robotics development

 * erlerobotics.com Linux version of pixhawk diydrones.
 * http://www.dronesmith.io/luci/ A drone entrepreneur with cool ideas for a human-machine-interface, or a developer working on the next generation of IoT applications, Luci provides ease of development with maximum performance. Uses https://www.yoctoproject.org/ for custom linux build from source(scratch).

Speed control

 * Uav links
 * ESC speed control, OsmcRobotics GPL project on Yahoo groups.
 * Battery rc batteries

cnc

 * CncControllers
 * Uav pepperball gun, Uav power generation, PCB manufacture
 * http://www.ohwr.org/projects/white-rabbit
 * UAV Outback Challenge Use same image processing ideas to look for intruders on farms

Links

 * Machine design Links to old archive.org books on bevel, spur, worm gear design.
 * Lidar, Slam
 * Hvlabs robotics control software opensource. PID control tuning
 * Dew robotics
 * iCub robotics
 * http://diydrones.com/profiles/blogs/visually-guided-return-to-base Automatic landing.
 * http://en.robotis.com/index/product.php?cate_code=101010 Linear actuators for robotics PID control over CAN bus
 * Kickstarter Uav projects on kickstarter.
 * Carbon tubes Spin own carbon tubes at 10% the cost of commercial versions. http://www.xwinder.com/
 * Igus robotics
 * Uav suppliers
 * Hardware hacking, Gears robot(belts, pulleys, servo's building blocks(modular))
 * Electric Car
 * South Africa uav http://www.steadidrone.com/
 * Gentlenav Preferred opensource UAV project.
 * Uav clones
 * Maxrotor Kickstarter project
 * Autoquad uav
 * RoboTics, MannedSystems combine with Antenna tracking

Uav external links
http://www.fightingwalrus.com/, https://github.com/fightingwalrus/iGCS  Fighting Walrus™ creates the best personal drone experience for iOS on Apple devices. The iDroneLink™ accessory and iDroneCtrl iOS App allows you to control your personal drone with your iPad or iPhone at distances up to a half mile.
 * http://myfirstdrone.com/

Intro
Combine www.Skydrone.aero video over cellar networks with suitable UAV project and fitted with Thermal imaging cameras. UavAirframes A few hundred UavAirframes fitted with cheap Gentlenav from Uav robotics and un-cooled $3500 ThermalImagingCameras streaming images over a 400Mhz WiMax link, patrolling the major Afghanistan routes will prevent IED attacks.With FpGa real-time image stabilization is done on the Mpeg4Compression, DVR stream, negating cross winds destabilizing the video image. This same principle can stop crime in South-Africa as well as piracy on the high sees. South-African law is tolerant of civilian drone usage - Drone swarming.

Gentlenav Matrix pilot, loiter an UavAirframes in a circle above a target, making the IMU dizzy proof. Gentlenav determined that that there is a 0.08sec delay in the magnetometer readings and compensated for this using feed-forward control and enabled automatic in-flight gyro calibration. Eliminate RF interference (http://sasecurity.wikia.com/wiki/Category:Wifi_construction), place pcb inside plastic box, painted with copper-paint, constructing a http://en.wikipedia.org/wiki/Faraday_cage.

As an UavAirframes circles in a spot its IMU gets 'dizzy' or saturated but Gentlenav solved the problem. Fixedwing speed control is achieved using the kinetic energy of the craft, thus a plane will dive to gain airspeed in addition to increasing throttle.

In strong winds the effective airspeed measured by the air speed sensor differs from ground speed, Gentlenav solved this by maintaining a constant ground speed irrespective of wind speed. For UAV'S to be useful it must be able to loiter in a loop over a target for any point of time and be able to maintain a path in any direction at an angle to a strong cross wind. The UAV will have to point its nose in a direction away from its intended path to compensate for the wind, meaning the vector calculations integrating GPS and magnetometer readings will be different than if there were no wind. In no wind the nose of the UAV is pointed in the desired direction of travel. Openpilot, Diydrones arducopter and Gluon Pilot fixed wing code can't compensate for cross winds, their code only works in calm weather. (this problem was fixed by diydrones).

Openpilot using EKF had a major edge over the DCM algorithm implementation of QuadroCopter, Quad frames until William Premerlani figured out the correct mathematical model of a quad. The diydrones DCM/EKF hybrid is now the preferred solution over Openpilot. William Premerlani made key mathematical breakthroughs in the modeling of drones.

Aluminum vs carbon fiber
https://www.youtube.com/watch?v=-MG4z6rnbpE Drill holes in aluminium Quad frames to reduce weight, much more cost effective then carbon legs.

Books
http://www.amazon.com/dp/B00NOGSQPS

http://makezine.com/review/

http://makezine.com/magazine/make-39/open-source-robotics-a-buyers-guide/

categories

 * SACAA
 * http://sasecurity.wikia.com/wiki/Category:Uav_airframes
 * http://sasecurity.wikia.com/wiki/Category:Uav_project
 * http://sasecurity.wikia.com/wiki/Category:Uav_quad
 * http://sasecurity.wikia.com/wiki/Category:Gentlenav
 * http://sasecurity.wikia.com/wiki/Category:Robotics
 * http://sasecurity.wikia.com/wiki/Category:Rcgear Long range radio gear, rc hobby, servo's tx,rx etc.
 * FPV