Thomas J Coyle III's Posts (237)

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3689580019?profile=originalHi All,

Andrew Tridgell, Linus Penzlien, and myself are beginning to prepare for the autonomous ground vehicle competition at the Sparkfun 2014 AVC to be held at Boulder, CO on June 21st.

The picture above is that of our Traxxas E-Maxx 1/8 scale 4WD Crusher autonomous rover that is guided by a 3DR APM2.6 and employs a 3DR GPS/Compass module along with a 3DR 915MHz telemetry radio.

The video below will give you an idea of the performance of the Crusher. The rover reached a speed of around 7 m/s in the straightaways and negotiated three chicane waypoints while traversing a 1/8 mile test course. The Crusher can easily reach speeds of ~28 m/s, but I am shooting for good performance in the straightaways and chicanes at 10 m/s.

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Regards,

TCIII ArduRover2 Developer

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It's customary and traditional that we celebrate the addition of every 1,000 new members here and share the traffic stats. This time we have a really special occasion to celebrate as we have reached the 50,000 member mark!!!!

Congratulations to Cantor Wargfn, of Charlotte, North Carolina USA, who became our 50,000th member!!!

There were approximately 2 million page views in the last month! (we now get around 67,000 page views a day average). It took us just 22 days to add these latest 1,000 members--we're averaging one new member every 32 minutes!

Thanks as always to all the community members who make this growth possible, and especially to the administrators and moderators who approve new members, blog posts and otherwise respond to questions and keep the website running smoothly.

Regards,

TCIII Admin

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By Marcus Wohlsen

Rolls Royce is moving toward a world where a single tap on a smartphone could set a massive cargo ship in motion half a world away.

As reported by Bloomberg, the company best known for luxury cars is designing drone cargo ships it says would be cleaner, more efficient, and less expensive than the manned ocean freighters that transport most of the world’s cargo today. If the project succeeds, these un-captained vessels could become a key link in a human-free global supply chain of consumer goods.

The push for drone container ships is part of a much larger effort in the logistics industry to automate the way goods and products move from place to place. Amazon is already using warehouse robots to move stuff inside its formidable order fulfillment operation, which has made cheap two-day delivery the industry standard. The online retailer has even promised delivery by tiny unmanned aircraft, though these are still more fantasy than reality. Google’s self-driving cars, on the other hand, are already on California highways. If the search giant follows through with its early efforts to compete with Amazon in the retail game, these autonomous vehicles could become a driverless fleet for the last mile of online order fulfillment.

Full article here: Drone Cargo Ships

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3-D printing 'ink' is way too expensive

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The filament required for 3-D printing have always been costly, but that should start to change soon.

3-D printer prices are steadily dropping in an attempt to woo hobbyists, but there's still a costly barrier to mainstream adoption: 3-D printer "ink."

Plastic filament, the standard material used by 3-D printers typically ranges in price from $25 to $45 for a kilogram depending on the quality and manufacturer.

That's a huge markup over the $2-per-kilogram cost of the plastic pellets used to make the filaments. Manufacturing and research and development account for some of the filament's added cost over the original materials. 

But even when taking those added costs into account, the price of filament is artificially inflated, according to Jon Goitia, an engineer for 3-D printing company BQ Readers.

That's why a handful of companies, including BQ Readers, are trying to drive filament costs down.

Full article here: Filament 

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An Orange Pixel flickers on the horizon, sandwiched between the inky azure of the mid-Pacific and the robin’s-egg pale of the Hawaiian sky. Richard Jenkins is the first to see it—a sailing robot, which has been blowing our way for a month. We’re in a small motorboat 7 miles out at sea, just north of Oahu’s windward shore. Dylan Owens gets the next good glimpse. “I see the wing,” he exclaims, “and the tail!”

Jenkins and Owens are the engineering duo behind Saildrone, which in the words of their website is “a wind-powered autonomous surface vehicle.” On October 1, the 19-foot craft was set loose in the San Francisco Bay with a simple command lodged in its electronic brain: Sail to Hawaii. For 2,248 nautical miles the boat did the rest. The path it chose happens to be identical to that of the annual Pacific Cup sailing race, and the fastest anyone has traversed this course is just over five days. The single-handed-sailing record is eight and a half days. As Jenkins and Owens look on, Saildrone is about to complete what might be called the first no-handed ocean sail: San Francisco to Hawaii in 34 days. It’s not quick, but then again there is no one aboard to complain.

Full article here: Honey Badger

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DIY Drones at 49,000 Members!

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It's customary and traditional that we celebrate the addition of every 1,000 new members here and share the traffic stats. This time it's 49,000!!!!

There were approximately 2 million page views in the last month! (we now get around 67,000 page views a day on average). It took us just 22 days to add these latest 1,000 members--we're averaging one new member every 32 minutes!

Thanks as always to all the community members who make this growth possible, and especially to the administrators and moderators who approve new members, blog posts and otherwise respond to questions and keep the website running smoothly.

Regards,

TCIII Admin

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Major new update for APM:Rover code!

3689570019?profile=originalArduRover Developer Test Track and Typical Mission Test Course

Good news from Andrew Tridgell and the rest of the APM:Rover (ArduRover) Development Team: they've pushed out a major new release (2.45). Major changes include: numerous updates for PX4 and Pixhawk, dual sensor support on the Pixhawk and reduced GPS latency for all three navigation controllers.

The following is from Tridge's release announcement. Please post any questions or comments there.

Pixhawk updates
The biggest set of changes are for the PX4 and Pixhawk boards. The Pixhawk production boards started shipping a few weeks ago and include some nice hardware features that didn't make it into the 2.44 release. The most important of these is dual sensor support. The Pixhawk has two gyros and two accelerometers, and (if you have an external GPS/compass combo) dual compass as well. In the 2.44 release only one of each of these sensors could be used. With the 2.45 release the health of each sensor is monitored and if one sensor fails the second sensor can take over. In addition to failover support the code logs both sets of sensor values both to MAVLink and to the logs on the microSD card, which is very useful for diagnostics. We are also working on dual GPS support which we hope to get into the next release.
GPS navigation improvements
A very simple change to our GPS configuration made a big difference for this release. In previous rover releases we setup the uBlox as ENGINE_AUTOMOTIVE as we thought that would be the best match for a rover. What we discovered recently is that using the AUTOMOTIVE mode led to much more time delay (lag) in the GPS velocity data, which led to poor handling of sharp turns. We have now switched to ENGINE_AIRBORNE_4G and found that we get much better navigation at higher speed with sharp turns.
Parameter storage
Another major change for this release is the way parameters are stored on PX4 and Pixhawk. In previous releases we stored parameters on a file on the microSD card. That usually worked fine, but recently there have been a few too many issues with FAT filesystem corruption of microSD cards, especially when powering off while writing to the SD card. For this release we have moved all parameters to the EEPROM on the PX4 and the FRAM chip on the Pixhawk. This makes parameter storage independent of the microSD card, avoiding parameters becoming corrupt due to microSD card problems. Parameters from a microSD card will be automatically copied to EEPROM/FRAM when you upgrade to APM:Rover 2.45.
Improved relay code
The relay and servo set code has had a major overhaul, with up to 4 relays now supported for MAVLink control and much better support for the DO_SET_SERVO, DO_SET_RELAY, DO_REPEAT_SERVO and DO_REPEAT_RELAY MAVLink commands. Along with these changes is a new parameter BRD_PWM_COUNT which allows you to specify how many auxillary PWM outputs to enable, with the remaining outputs being available as digital relays. This allows you to re-assign some of the aux servo outputs on Pixhawk for use as relays, by setting the RELAY_PIN, RELAY_PIN2, RELAY_PIN3 and RELAY_PIN4 parameters. The pin numbers for these pins start at 50 for the first aux servo pin, and go to 55 on Pixhawk.
Improved logging
There have been logs of logging improvements in this release. Apart from the dual sensor logging, we can now transfer on-board log files to the ground station over MAVLink, which makes it much easier to get detailed logs without having to pull a microSD card out, or boot to the CLI. We're hoping to remove the need for the CLI completely in a future release, doing everything over MAVLink.
The new logging code also includes the git version number of APM and (if needed) the PX4Firmware and PX4NuttX repositories used to build the firmware in the logs. This makes it easier to track down any issues to the exact code used.
More telemetry ports
On Pixhawk and PX4 you can now have a 3rd telemetry port, allowing USB and two serial telemetry ports to be active at the same time, which is very useful when you have an onboard computer.

Regards,

TCIII ArduRover2 Developer 

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DIY Drones at 48,000 Members!

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It's customary and traditional that we celebrate the addition of every 1,000 new members here and share the traffic stats. This time it's 48,000!!!!

There were 1.8 million page views in the last month! (we get around 60,000 pageviews a day on average). It took us just 22 days to add these latest 1,000 members--we're averaging one new member every 32 minutes!

Thanks as always to all the community members who make this growth possible, and especially to the administrators and moderators who approve new members, blog posts and otherwise respond to questions and keep the website running smoothly.

Regards,

TCIII Admin

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This sensor technology is ideally suited for any project requiring very compact, low power, high performance distance measurement sensors, such as drones, robots, or unmanned vehicles.

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PulsedLight’s novel signal processing technology enables them to offer a low-cost optical distance measurement solution with performance comparable to systems costing hundreds of dollars.

This optical distance measurement sensor is capable of measuring out to 40 meters using inexpensive, off-the-shelf, electro-optical components. The MiniModule employs the basic principles behind ToF to measure distance. However, a unique signal processing approach has been developed to determine the time delay between an encoded transmit signal and its return.

Project crowdfunding site here: LIDAR-Lite

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By John O'Donnell

This is a guest post. The views expressed here are solely those of the author and do not represent positions of IEEE Spectrum or the IEEE.

While the idea of an Amazon Prime Air drone dropping onto my doorstep and delivering my latest purchase might seem fun and cool, the reality is it simply may not be needed.

The only reason delivery trucks—such as the large brown trucks we see everywhere—only deliver to me around 4 p.m. each day is simply the time taken for one driver to take each parcel to an address. I call this one at a time parcel delivery. It's the same story for the USPS service. Each day our excellent delivery guy comes to our neighborhood and then spends a long time going door to door.

Imagine if he could deliver to every house at the same time. This would mean he could do multiple delivery runs each day. And in the case of the brown truck, it would mean that when my new purchase arrives at my local distribution center at, say, 2 p.m., it would be actually delivered the same day. That would be possible because our new fast delivery service would return to the distribution center and pick up another load, since now it can deliver to many houses at the same time (at least in a residential area).

But how can this be achieved? Let me say that no flying machines are needed! Instead we just need a new style of truck—one that carries a fleet of robotic delivery vehicles. In this scenario the driver would park in the middle of the neighborhood and then hit "deploy." All the robotic vehicles in his truck would already have self loaded their parcels and, after the doors open, they would scurry out to their addresses to drop the parcels, then return to the truck.

In this scenario, there are no flying robots involved; the robots needed would either be on wheels, tracks, or perhaps legs such as those from Boston Dynamics.

You could imagine the truck goes to the start of a street and deploys these mini vehicles. It then drives to the end of the street and picks them all up. The truck might even just drive slowly down the street and the robotic vehicles would deploy and return while the vehicle is moving. The point would be to empower the delivery driver to be able to handle way more parcel deliveries each day and therefore increase the number of possible deliveries.

In the case of large or heavy packages, you would have multiple robots carry them to the doorstep. Instead of robots of different sizes, I would propose a single size of robotic delivery vehicle that could then combine with others to increase load carrying ability.

Yes, we would all like to receive a package 30 minutes after ordering, but the best start could be to take our current delivery systems and enable the drivers to be able to deliver much faster and multiple times through the day.

The delivery guy of the future, instead of being just the guy who drops a package on your doorstep, could actually be a robotic specialist in control of his own fleet of robots.

Perhaps my son, who took delivery of his own Lego Mindstorms EV3 system this Christmas, will start working on a prototype.

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Arduino-Controlled Autopiloted Sailboat

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January 8, 2014 by Kristina Panos

[Jack], a mechanical engineer, loom builder, and avid sailor wanted an autopilot system for his 1983 Robert Perry Nordic 40 sailboat with more modern capabilities than the one it came with. He knew a PC-based solution would work, but it was a bit out of reach. Once his son showed him an Arduino, though, he was on his way. He sallied forth and built this Arduino-based autopilot system for his sloop, the Wile E. Coyote. Full article here: Arduino controlled sailboat

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DIY Drones at 47,000 Members!

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It's customary and traditional that we celebrate the addition of every 1,000 new members here and share the traffic stats. This time it's 47,000!!!!

There were 1.8 million page views in the last month! (we get around 60,000 pageviews a day on average). It took us just 27 days to get this latest 1,000 members--we're averaging one new member every 39 minutes.

Thanks as always to all the community members who make this growth possible, and especially to the administrators and moderators who approve new members, blog posts and otherwise answer questions and keep the website running smoothly.

Happy New Year! 

Regards,

TCIII Admin

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2013 3D Printer Comparison Guide

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By Randall Marsh

December 19, 2013

The 3D printer industry is growing in both the professional and maker markets. With more and more 3D printers diving under the US$4,000 price-point, is it time for you to pick up one of your own? Though the consumer end of the market is still young, business is booming, and this disruptive technology is something that will definitely appeal to many Gizmag readers. That’s why we’ve taken the top desktop 3D printers and lined them up for a side-by-side comparison.

Full article here: 3D Printer Line-up

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By Brian Dodson

December 1, 2013

Batteries. We buy them at the store, use them up, and throw them away without much thought. In reality, however, batteries are remarkably complex electrochemical devices that are continually evolving. The latest example of this comes from the Lawrence Berkeley National Laboratory, where researchers have invented an advanced lithium/sulfur (Li/S) cell that offers a unique combination of energy storage, power, recharge speed, and survivability.

Lithium/sulfur rechargeable batteries offer a remarkably large capacity for energy storage, mainly because two electrons are produced each time a molecule is processed through the battery's chemistry. Full article here: LiS Battery

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By Darren Quick

December 3, 2013

With 3D printers dropping below the US$200 mark, the home 3D printing revolution appears to be getting into full swing, which is great ... if you want to make things out of plastic. Unfortunately, the price of commercial metal 3D printers means the ability to print metal objects has remained out of reach of most people. That could be set to change with a team from Michigan Technical University building a 3D metal printer for under $1,500. Full article here: 3D Metal Printer

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DIY Drones at 46,000 Members!

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It's customary and traditional that we celebrate every new 1,000 members here and share the traffic stats. This time it's 46,000!!!!

There were 1.6 million page views in the last month! (we get around 53,000 pageviews a day on average). It took us just 30 days to get this latest 1,000 members--we're averaging one new member every 43 minutes.

Thanks as always to all the community members who make this growth possible, and especially to the moderators who approve new members, blog posts and otherwise answer questions and keep the website running smoothly.

 

Regards,

TCIII Admin

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By Darren Quick

November 25, 2013

Parrot's AR Drone quadcopter has been strutting its smartphone-controlled stuff for a few years now, but fixed wing remote controlled aircraft have been a little thinner on the ground – and in the air. TobyRich, a German company specializing in smartphone-controlled gadgets, has now launched its SmartPlane, which it calls "the first smartphone-controlled airplane in the world."

Here is a close-up of the lightweight plane: 

3689560523?profile=originalFull article here: SmartPlane

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By Evan Ackerman

As amazing as flying robots are, there's a limited amount of useful stuff that they can do today. Oh, they're great for surveillance and inspection, there's potential to use them to deliver stuff, and in some specialized circumstances we've seen them cooperatively building structures. But to really be useful in the way that we've come to expect from robots, they're going to need to be able to move a variety of objects at will, picking them up and putting them down whenever and wherever they need to. We saw some of the first examples of this at IROS, giving a whole new meaning to the term “mobile manipulator.”

The easiest way to put a mobile manipulator on a UAV is to just bolt a robot arm right on there, which is what DLR (the German Aerospace Center) is trying out. They've got a 7-DOF KUKA industrial arm mounted upside-down underneath an autonomous, turbine-powered mini helicopter. Using an on-board vision system, the robot is able to detect and grasp a pole stuck into the ground. This is tricker than it sounds, because even as the helicopter moves the base of the arm, whenever the arm moves, it changes the center of gravity of the system and moves the helicopter as well:

In terms of practicality, this is simply the very first step, but DLR is looking forward to some heavy lifting:

We think that for many practical applications the usage of a fully actuated arm with a payload of about 10 kg is required. So the setup we presented in this paper is a starting point for practical investigations of these applications and for developing of corresponding technologies.

“First Analysis and Experiments in Aerial Manipulation Using Fully Actuated Redundant Robot Arm,” by Felix Huber, Konstantin Kondak, Kai Krieger, Dominik Sommer, Marc Schwarzbach, Maximilian Laiacker, Ingo Kossyk, Sven Parusel, Sami Haddadin, and Alin Albu-Schaffer from the Institute of Robotics and Mechatronics, DLR, was presented earlier this month at IROS 2013 in Tokyo, Japan.

Full article here: UAVs with robotic arms

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