PIVlab tutorial, part 2/3: Pre-processing, analysis and data validation William Thielicke 2021-04-27 | PIVlab is a very popular software for Particle Image Velocimetry, developed by William Thielicke.This video shows you how to pre-process your images, how to find suitable PIV settings, and how to validate the data using PIVlabs filtering capabilities.Part 1/3: youtube.com/watch?v=g2hcTRAzBvYPart 3/3: youtu.be/47NCB_RFiE8Please note that I confused the x and y axes when I was setting the offsets....Get the printed version of my thesis:pivlab.blogspot.com/2018/11/order-book-about-pivlab.html
Run PIVlab in your web browser! William Thielicke 2024-04-03 | This is a quick demo showing how easy it is to run PIVlab in your web browser. No licenses required, free for everyone (well, for 20 hrs each month).http://www.mathworks.com/matlabcentral/fileexchange/27659-pivlab-time-resolved-particle-image-velocimetry-piv-tool
PIVlab PIV system: Pulsed diodes, cameras, frame straddling, etc. William Thielicke 2023-03-23 | This video shows details about the PIV system built around PIVlab. This is probably the easiest to use PIV system there is.... and of course I forgot to add the link to the paper... So here it is:gala-ev.org/images/Beitraege/Beitraege2022/pdf/04.pdfHere you can buy the PIV equipment:optolution.com/en/products/particle-image-velocimetry-pivAnd here is the software repo:github.com/Shrediquette/PIVlab/releases
Propeller power William Thielicke 2021-11-07 | Propeller jetpack for my daughters. Built from scratch using some model airplane parts, circuitpython microcontrollers, a Wii Nunchuck game controller and a modified rucksack. The propeller case was extracted from a ventilator.
PIV like a PRO with PIVlab! William Thielicke 2021-10-26 | This video shows you some of the hardware interactions that can be done in PIVlab. Now you can perform particle image velocimetry experiements without getting up from your chair. Hello future!All hardware available via www.Optolution.comgithub.com/Shrediquette/PIVlab
Real-time PIV in PIVlab William Thielicke 2021-05-17 | First test of realtime particle image velocimetry in PIVlab. Images are preprocessed, analyzed (single pass) and then post-processed to remove outliers. This is not yet optimized for speed, but on a recent core i5 laptop I get something around 3 Hz.
PIVlab tutorial, part 3/3: Data exploration and data export William Thielicke 2021-04-27 | PIVlab is a very popular software for Particle Image Velocimetry, developed by William Thielicke.This video shows you how to derive parameters, extract data and export data in PIVlab.Part 1/3: youtube.com/watch?v=g2hcTRAzBvYPart 2/3: youtube.com/watch?v=15RTs_USHFkGet the printed version of my thesis:pivlab.blogspot.com/2018/11/order-book-about-pivlab.html
PIVlab tutorial, part 1/3: Quickstart William Thielicke 2021-04-27 | PIVlab is a very popular software for Particle Image Velocimetry, developed by William Thielicke.This video shows you how to install PIVlab and how to get your image data into PIVlab.Part 2/3: youtu.be/15RTs_USHFkPart 3/3: youtu.be/47NCB_RFiE8Information about the synchronizer (PIVlab-SimpleSync) is available here:optolution.com/en/news/single-view-en/pivlab-open-source-softwareGet the printed version of my thesis:pivlab.blogspot.com/2018/11/order-book-about-pivlab.html
Aerodynamics: Drone in free and tethered flight in a wind tunnel William Thielicke 2020-10-05 | Testing our wind-measuring drone in the wind tunnel. The aim was to have a defined flow, and check for the propeller influence at different flight speeds.A paper on this drone is available here:amt.copernicus.org/preprints/amt-2020-258
Villa la Chouette William Thielicke 2020-08-09 | This is a quick presentation of our holiday house 'Villa la Chouette' in Le Lavandou, France. My family spends their holidays over there every year, but it is also available for rent (this is why I made this video public):airbnb.com/h/villalachouetteMusic: Horses by Pictures of the Floating World is licensed under a Attribution-Noncommercial-Share Alike 3.0 United States License.
Vortex shedding - PIV visualization: Particle Image Velocimetry in Matlab with PIVlab (4K + 60 fps) William Thielicke 2020-04-24 | PIV analysis in a water tunnel, vortex street behind a cylinder.pivlab.blogspot.com
DroneClash 2019 - Team Dipol William Thielicke 2019-02-07 | Our team consists of three competition proven multirotor pioneers: Klaus-Peter Neitzke, Ruben Jubeh and William Thielicke. We will try to score with speed, agility, reliability and robustness. Rules:Each team must have at least one Fighter drone and a Queen drone, but more drones are allowed.The team to first knock out the queen of the opponent wins. It’s similar to boxing. A ‘knock out’ means that the queen drone is on the ground for more than 10 seconds.
The beauty of PIV cross-correlation! William Thielicke 2018-10-29 | This animation shows the cross-correlation matrices of four Particle Image Velocimetry (PIV) studies. PIV is a method to derive velocities from fluids. It uses cross-correlations between two images to estimate a displacement. And these cross-correlations are what you see in the animation. Each correlation has a small yellow peak. The distance from the centre of the matrix to this peak actually tells you the speed of your fluid at a specific point! The small black circle is from the peak finding algorithm - it locates the peak with sub-pixel accuracy. This is how a PIV software calculates all the vectors. The matrices were calculated with PIVlab in MATLAB. They were also rendered to a movie file in MATLAB.My PIV tool: pivlab.blogspot.comMore info on PIV: en.wikipedia.org/wiki/Particle_image_velocimetryMusic: Cliverpool by Pierlo is licensed under a Attribution-Noncommercial-Share Alike 2.5 Italy License.
Wing Race 1st place, Meet&Greet 3.1 - Hannover William Thielicke 2018-05-29 | This is a DVR from a wing race in Hannover. I participated with my Edgecrusher, which is a 250g plane (AUW) built for tight race tracks on soccer fields. We started training with only 4 contestants, then only two were left in the actual race. It was fun however, and I am sure that there will be more people joining such events soon!Setup:Shrediquette Edgecrusher twin puller Emax Femto FC2x xnova 1407 3100 kV4x4.5 2-blade Props3x Savöx SH-0264MG Servo4S 450 mAh - 1000 mAh Lipo2x Emax Bullet 12A ESCsUnify Pro Race VTXRuncam Micro Eagle
FPV plane Edgecrusher on a copter race track William Thielicke 2018-05-20 | Did a quick test with my 250g FPV plane. It works and is quite a lot of fun!Setup:Emax Femto FC2x xnova 1407 3100 kV4x4.5 2-blade Props3x Savöx SH-0264MG Servo4S 450 mAh - 1000 mAh Lipo2x Emax Bullet 12A ESCsUnify Pro Race VTXRuncam Micro EagleDetails of the plane: youtube.com/watch?v=P8i_N26-Hzg
DroneClash - Finals + Qualification: Team Dipol William Thielicke 2018-02-15 | We ran out of luck in the finals, but that didn't matter as we had tons of fun!! This video is a compilation of our runs with the official moderation videos.DroneClash - RobotWars in the sky!February 13, 2018, The NetherlandsEight international teams have registered for DroneClash! During this competition the teams use their highly sophisticated drone(s) to take down as many other drones as possible, RobotWars in the sky as it were. Teams need to bring at least two drones per battle, but they can use more if they want to. They also need to avoid a number of anti-drone interventions. The teams will battle on 13 February in a former airbase hangar in the Netherlands. Besides fun and a truck load (filled to the top) of honor, the teams battle for €50.000 prize money.Rules: http://www.droneclash.nl/teams/Meet the teams here:http://www.droneclash.nl/eight-teams/
Fastest lap, first place: Coptergeschwader Hannover Indoor Funrace William Thielicke 2018-02-11 | Thanks for organizing this event! I loved the track!Recoil xy-stretchOnboard HMDVR-S DVR Video RecorderMicro Swift v2, 2.1mmEmax FemtoEmax bullet 12AAMAX 1105 4000 kV4S 450 mAhGemfan 3035 3-bladeThrottle curve limited to 70 % (otherwise it becomes hard to fly in such a small space...)
PIVlab - Background and quick start guide William Thielicke 2018-02-11 | I am talking about why I developed PIVlab, and how you use it for your studies.PIVlab website:http://PIVlab.blogspot.comJORS paper:openresearchsoftware.metajnl.com/articles/10.5334/jors.blThesis Chapter:http://www.rug.nl/research/portal/files/14094707/Chapter_2.pdfGet the printed version of that chapter:pivlab.blogspot.com/2018/11/order-book-about-pivlab.htmlTutorial:https://pivlab.blogspot.de/p/blog-page_19.html
Towards CFD with FPV racing drones William Thielicke 2017-12-21 | I am currently checking the feasibility of computational fluid dynamics with racing drones in Autodesk CFD2018.This is one of my first attempts to simulate a simple copter draft by Heiko Schenk. I am still very new to CFD, so I am looking for feedback too.I am including the effect of the propeller jet and also the motor housing rotation. The flow velocities of the propellers were calculated in JavaProp.
6 km FPV long range over Bremen with Fail-safe crash William Thielicke 2017-11-16 | The crash comes at the very end :-(Please fly responsibly... Really...! #ruiningthehobbyA little experiment made with Google Earth Flight simulator. Respect the rules, so that we can have fun with our hobby as long as possible. Never do long range close to populated areas, as there can ALWAYS be problems..
FPV racing airplane: CAD design, 3D milling & maiden flight! William Thielicke 2017-11-08 | I wanted to create a small FPV racing aircraft that has a good performance on small racing tracks with FAI gates. So I created this bimotor airplane. The yaw control makes it very agile. I am using a flight controller with iNAV firmware to stabilize all axes.I like the results, and I am looking forward to fly it on race tracks with a lot of gates.Setup:Emax Femto FC2x xnova 1407 3100 kV4x4.5 2-blade Props3x Savöx SH-0264MG Servo4S 450 mAh - 1000 mAh Lipo2x Emax Bullet 12A ESCsUnify Pro Race VTXRuncam Micro Swift
Drone Racing With Side Force Generators (SFGs) William Thielicke 2017-10-27 | FPV racing multirotors with side force generators (SFGs), will drift less during turns, making them potentially faster on race tracks. But the SFGs need the be carefully placed and dimensioned, so that aerodynamic centre and centre of mass are at the same position. Otherwise it will not work. Find some information on the aerodynamic background here:http://shrediquette.blogspot.de/2017/10/side-force-generators-sfgs-in-fpv-racing.html
FPV flying wing (twin puller with flight controller) William Thielicke 2017-09-12 | I feel like 7 years ago, and I am having fun like 7 years ago. This configuration flies pretty awesome and I have full control and stabilization on all axes (roll, yaw, pitch).Components:Emax femto with iNAV firmware2x T-Motor MN1806 2300 kV Graupner Raceprop cut to 4.0"1550 mAh 4SSwift mini
Racetrack: 260g AUW 4 Recoil XL William Thielicke 2017-04-23 | Captured during a meeting yesterday. Great fun! Thanks to Markus and André for making this possible!
3, 4, 5 comparison (side-by-side) of racing copters on racetrack William Thielicke 2017-04-08 | I always wanted to compare the performance of my 3, 4 and 5 inch racing copters. Today there was the opportunity. They weigh around 130g, 260g, respectively 470g. I have to say that one of the motors of the 4" racer was damaged during a crash earlier this week. This motor becomes really hot (and the others don't). This cost a lot of performance. Actually the speed of the 4" is almost identical to the 5".The track was almost a "full throttle only" track, so I am really surprised that the difference is pretty small.
Recoil 125mm 125g brushless quad indoor track William Thielicke 2017-03-18 | Great fun in a small gym.
Superhydrophobic surfaces / lotus effect by W.Th. William Thielicke 2017-02-07 | http://william.thielicke.org/LotusEffekt
RECOIL mini quad, first time on the racetrack William Thielicke 2017-02-04 | This little machine is still great fun...! Pretty fast too on a normal racetrack.http://shrediquette.blogspot.de/2017/01/125mm-125g-mini-brushless-copter.html
RECOIL: 125mm MTM 125g AUW copter compilation of two days William Thielicke 2017-01-22 | https://1.bp.blogspot.com/-RS0M57ZqULg/WICeUaUdRLI/AAAAAAAAKYQ/pv3RRI-W8-ogJ7AL3-cxL1-TmTmRWaJhQCLcB/s1600/kattakotta.302.jpgEmax F3 femtoRCX H1105 5000 kVRacerstar 6A3x2" props3S 450 mAhFX806TCCustom frame
QX90 Freestyle William Thielicke 2016-11-24 | Well, I am not an expert in freestyle, and the possibilities are limited of course. But I think it is quite impressive what you can do with such a small machine. The flight time is still 5:30 mins...Sorry for the bad video link, I think the DVR was not positioned correctly.This is flown with stock Eachine QX90 hardware, cleanflight with slightly modified parameters, Spektrum satellite, Gemfan 65 mm props, turnigy Graphene 600 mAh 1S and a custom 5.5g frame.
Velocidrone FPV Simulator vs. Reality - NCAR Racetrack William Thielicke 2016-11-18 | It is so cold outside... That's why I installed Velocidrone, and rebuilt the NCAR Graft Racing track of this summer. Scaling and distances was extracted from Google maps. I compare the simulator to the recording of 'Gare FPV'. Pretty much fun!
Eachine QX90 Acro Office Race at the Limit. 60 FPS. William Thielicke 2016-10-28 | Recently got the QX90, and I like it a lot! In acro mode, it almost flies like a big machine, plenty of fun!
1st place Coptergeschwader Meet & Greet #2 William Thielicke 2016-10-16 | Setup:Shrediquette derbe evoshrediquette xmega FCCobra 2204/2300 RPM/VGemfan 5x5 BullnoseFatshark 700 TVL v2
1st place FPV Race Coptergeschwader Meet & Greet Hannover William Thielicke 2016-05-22 | It was an awesome track and it was cool to meet you again!Shrediquette 'derbe evo' v2Shrediquette xMega Flight Controller--Setup (for tight, slow tracks):Cobra 2204/2300kVGraupner Ultra 20A ESCsGraupner C-Prop 5x3"Fatshark 'CCD-Killer' 700 TVL v235° camera tiltFPV cam tilt compensationTBS Unify Pro @25 mW1300 mAh GensAce 75C470g take-off weight
Mid-air crash in quarter finals at the FPV Drone Race 2016 - Zellhausen William Thielicke 2016-05-03 | I had absolutely great fun at the FPV Drone Race 2016, even managed to get the 3rd fastest qualification time after Andreas Graf alias 'Andi G. FPV' and Mac Poschwald alias 'Dronksy'. I am happy to see that the derbe evo and my flightcontroller can compete with the best international pilots. Although I had to mount a GoPro session to the copter which does almost eliminate any aerodynamic advantage...I was trying to fly safe and slow in the quarterfinals but then I crashed with another copter in the second lap already. I don't think that I could have avoided this, probably the other pilot did also not see me, as we crashed sideways. But watch it yourself and let me know what you think!Setup:derbe evo v2Graupner Ultra 2803 / 2300kVHQ 5.5x4.5" semi-bullnoseLittlebee 20AShrediquette xMega FCShrediquette PDBGoPro Session DummyCCD KillerTBS Unify ProTurnigy Graphene 1300 mAh (thank you FPVmicha and Ruben for borrowing your lipos!!)
Graupner C-prop 5.5x3 vs. HQprop 5.5x4.5B Test flight William Thielicke 2016-04-13 | I have two types of propellers that I like: Graupner C-prop 5.5x3" and HQprop 5.5x4.5B". The HQprops have a higher top speed, and they are better on long tracks without tight turns. I was however unsure if they can compete with the C-props on short and tight tracks where you can hardly go to full throttle. Therefore I made this quick test today.Both propellers perform almost identically on tight tracks, the c-props are just a little bit better.I also tested some 5x4 triblades, but they are just loud crap and can't compete at all with the 2-bladed props that I tested today. I might however test some other triblades in the future.
INTERCON 2016 - Dr. William Thielicke William Thielicke 2016-03-19 | Congreso INTERCON 2016, Piura, Congreso Internacional de Ingeniería Eléctrica, Electrónica y Computación
Shrediquette derbe evo - first flight William Thielicke 2016-02-28 | This is a dirty video of the first flight. I tested both Graupner C-Props and Graupner Race-props (both 5.5"). C-Prop is fast, Race-prop is just insane. The speed at full throttle is frightening.The correct antenna is still missing...
Teaser: Shrediquette derbe evo William Thielicke 2016-02-21 | 212 mm MTM, 5.5" Graupner Race-prop.First flight in march 2016.
FPV camera tilt compensation, explained by the inventor William Thielicke 2016-01-11 | ...I recently had a simple idea on how to improve the handling of racing multirotors, and just implemented this feature in my flight controller.Background here:http://shrediquette.blogspot.de/2016/01/some-thoughts-on-camera-tilt.htmlAlmost every 'serious' FPV racer is tilting the FPV camera up in order to have a better image during fast flight. Angles between 10 and 35 degrees seem to be common. E.g. I am using 25 degrees. But tilting the camera with respect to the multirotors horizontal plane has a side effect on the controls (maybe you never thought about it, because you are so used to flying with this side effect).'FPV camera tilt compensation' eliminates this effect, and I think it enhances the flight performance of your racing multirotor.In Betaflight, this parameter is called Fpv_mix_degrees or roll_yaw_cam_mix_degreesPlease note that this was my first flight with a large camera (GoPro) attached to a racing copter. I was a bit surprised by the negative impact of the extra weight & drag, and I was not really feeling confident yet. I do not really understand why people deliberately choose to fly competitions with action cameras mounted on their machines... X-D
Shrediquette DERBE wind tunnel test William Thielicke 2015-12-28 | Flow visualization (Particle Image Velocimetry - PIV). 30 m/s, full throttle, 45 degrees pitch angle, Graupner C-Prop 5.5x3", 4S 75C, Ultra 2806 2300 kV ... see http://shrediquette.blogspot.com for the background story.Thanks to Florian for support & filming!
Shrediquette 0815 William Thielicke 2015-12-01 | A standard quad designed for everyday practice:FC: Shrediquette xMega230 mm MTMScorpion 2205-2350kVGraupner C-prop 5.5 x 3"4S 1300 mAh520 g take-off weighthttp://shrediquette.blogspot.com
Shrediquette DERBE William Thielicke 2015-08-29 | A tilted-body FPV racing quadrotor. The focus is on robustness and low drag. See details on shrediquette.blogspot.com
FPV racing: Yaw turns vs. pitch turns: How do you do it? William Thielicke 2015-08-02 | There seem to be two different strategies for turning in FPV racing. I usually do the "pitch turning", but today I also tried the "yaw turning" which is something that other pilots seem to do.My theory is the following: People that learnt how to fly with a multirotor in leveling mode will use "yaw turning", because that feels more familiar to them - even if they now fly in acro mode.People that learnt how to fly with a plane, a helicopter or a multirotor in rate mode will use "pitch turning", because that feels more natural to them.What do you think? How do you fly turns, and why?
Shrediquette QRC5 3rd Lipo test William Thielicke 2015-05-25 | http://shrediquette.blogspot.de/2015/04/qrc5-design.html
Automatic follow-me walking robot William Thielicke 2014-08-07 | Theo-Jansen style walking robot, equipped with a Wii infrared camera to automatically control the position of the robot.
Shrediquette GEMiNi William Thielicke 2013-07-15 | The GEMïNï is extremely fun to fly, it seems to be very fast and agile - better than any copter I built before. For one full FPV flight of the GEMïNï, see this video: http://youtu.be/EgdzvJyRokYMusic: The Glitch Mob - Fortune Days
Low altitude and fast FPV flight: Shrediquette GEMiNi in a park William Thielicke 2013-07-11 | This video is a quick and dirty demonstration of the speed and agility of my latest GEMiNi hexrotor.http://shrediquette.blogspot.de/The copter is controlled in heading hold / angular velocity mode.Miniature hexacopter / hexrotor for fast FPV flight, and multirotor air races. Frame layout based on the Shrediquette MM6Max. dimension: 315 mmMotors: 6 x 2100 RPM/V, 14 grs, Turnigy C1822ESCs: Turnigy Plush 6A (SiLabs controller)Battery: 11.1V, 1000 mAh LipoPropellers: 4x4.5", 10° tiltedChassis: glass fibre / balsa sandwichCanopy: Thermoformed polystyrolController: Shrediquette Xmega MPU60x0Camera: "CCD Killer" CMOS camera + 2.1mm lensAV transmitter: Airwave 5.8GHz, 25 mWAV receiver: ImmersionRC Duo v3Weight: 265gEndurance: 7 minutes with this flight style
