Difference between revisions of "Dzenushko Dainis: Walking mechanisms survey"

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There are several basic types of "walking"  
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There are several basic types of "walking" mechanisms based on conversion of the rotational motion into the translational motion.
mechanisms based on conversion of the
 
rotational motion into the translational motion.
 
 
----
 
----
  
==Chebyshev Walking Mechanism==
+
==The Chebyshev Walking Mechanism==
 
<gallery widths=330px heights=300px perrow = 3>
 
<gallery widths=330px heights=300px perrow = 3>
 
File:stopohodjashaja_mashina_1.jpg
 
File:stopohodjashaja_mashina_1.jpg
Line 14: Line 12:
 
----
 
----
  
==Klann Mechanism==
+
==The Klann Mechanism==
  
 
[[File:Klann_1.png]]  
 
[[File:Klann_1.png]]  
Line 20: Line 18:
 
[[File:Klann_3.gif]]
 
[[File:Klann_3.gif]]
  
*The Klann linkage provides many of the benefits of more advanced walking vehicles without some of their limitations. It can step over curbs, climb stairs, or travel into areas that are currently not accessible with wheels but does not require microprocessor control or multitudes of actuator mechanisms. It fits into the technological space between these walking devices and axle-driven wheels.
+
*The Klann linkage provides many of the benefits of more advanced walking vehicles without some of their limitations. It can step over curbs, climb stairs, or travel into areas that are currently not accessible with wheels, but does not require microprocessor control or multitudes of actuators. It lays between these walking devices and axle-driven wheels.
  
 
----
 
----
  
==Theo Jansen mechanism==
+
==The Theo Jansen Mechanism==
 
<gallery widths=330px heights=300px perrow = 3>
 
<gallery widths=330px heights=300px perrow = 3>
 
File:Jansen 1.JPG  
 
File:Jansen 1.JPG  
Line 40: Line 38:
 
</gallery>
 
</gallery>
  
==Creating a self-propelled platform based on the mechanism of Theo Jansen==
+
==Creating a self-propelled platform based on the mechanisms of Theo Jansen==
 
 
Watching the Theo Jansen mechanisms makes me want to be able to ride on them
 
(or to "walk"). So, it crossed my mind to create such a device, that could move me
 
(in a reduced scale, for the beginning). But if we want to ride it, first we need to lern it how to turn.
 
  
 +
Watching the Theo Jansen mechanisms causes the desire to be able to ride on them (or to "walk"). So, I decided to create such a vehicle, which could move me (in a reduced scale, for the beginning). But if we want to ride it, first it should be able to turn left or right.
 
*How to achieve it?
 
*How to achieve it?
It is possible to make two independent parts with two independent engines, and by controlling their speed separately turn as well as any crawler does.
+
It is possible to make two independent parts with two independent motors, and by controlling their speed and direction separately turn as any crawler does.
 
+
*Why this one is better than a wheeled vehicle?
*Why this devise is better than a wheeled vehicle?
+
If you're driving on sand or any loose terrain, the wheels may start to slip. But the walking mechanisms do not have this problem.
If you're driving on sand or any loose material, the wheels may start to skid. But the walking mechanisms do not have this problem.
 
 
 
 
*What has been done?
 
*What has been done?
 
Currently, the manufacturing process has been developed and debugged.
 
Currently, the manufacturing process has been developed and debugged.
 +
*How is it done?
 +
This platform is created from acrylic, aluminum tubes, screws and nuts. In general, they are common materials. The materials chosen basing on the cheapness, the ease of use and aesthetic considerations. But it all started with a sketch of the parts in 1:1 scale. The sketches are presented below:
  
*How is it done?
 
This platform is created from plexiglas, aluminum tubes, screws and nuts. In general, they are not that rare materials. The materials were selected on the basis of cheapness, ease of use and aesthetic considerations. But it all started with a sketch of the parts in 1:1 scale. The sketch is reproduced below:
 
  
 
<gallery widths=300px heights=425px perrow = 3>
 
<gallery widths=300px heights=425px perrow = 3>
Line 64: Line 57:
 
</gallery>
 
</gallery>
  
Then I had to deal with the first problem of this project, the friction reducing. To cope with it, the ​​simple slide bearings were made from the aluminum tubes:
+
Then I had to deal with the first problem of this project, the friction. To decrease it, the simple slide bearings were made from aluminum tubes:
 
<gallery widths=300px heights=300px perrow = 2>
 
<gallery widths=300px heights=300px perrow = 2>
 
File:Roller_1.jpg
 
File:Roller_1.jpg
Line 70: Line 63:
 
</gallery>
 
</gallery>
  
After the first assembly I realised that it is not so easy to align the crankshaft. This problem was solved by threading it on the rods, this allowed me to align the central axis at the final assembly. And here is the first photos of the second part during the assembly proccess. It is possible to see all the six rods going through the entire mechanism:
+
Here's how the first module looks like:
 
<gallery widths=500px heights=280px perrow = 2>
 
<gallery widths=500px heights=280px perrow = 2>
 
File:Build2_1.jpg  
 
File:Build2_1.jpg  
Line 85: Line 78:
  
 
==What is planned next?==
 
==What is planned next?==
1) make the second part (DONE)
+
 
 +
1) manufacture the second module (DONE)
  
 
2) combine them (DONE)
 
2) combine them (DONE)
  
3) mount engines(DONE)
+
3) mount motors(DONE)
 
 
4) create a controll system (DONE)
 
  
5) create and install a remote control
+
4) develop a control system (DONE)
  
 +
5) develop and install a remote control
  
 
06.10.11 at 23:58 the first successful launch of the combined mechanism had been performed
 
06.10.11 at 23:58 the first successful launch of the combined mechanism had been performed
 +
Now the wired control system is set up. So that's what we have:
  
Now the wired control system is set up.
 
So that's what we have:
 
 
<gallery widths=900px heights=400px perrow = 1>
 
<gallery widths=900px heights=400px perrow = 1>
 
File:IMAG0758.jpg
 
File:IMAG0758.jpg
Line 107: Line 99:
 
[[File:intensiv.jpg |300px|right]]
 
[[File:intensiv.jpg |300px|right]]
  
The next walking mechanism, now based on the Arduino platform, was assembled during the [http://fablab.spbstu.ru/2013/06/post750/ Summer Crash Course] for pupils in Fablab Polytech held at the end of June 2013 under the supervision of [[:ru:Andrey_Murachev|Andrey Murachev]] and [[:ru:Dzenushko_Dainis|Dainis Dzenushko]]. The Arduino board control was performed from a computer using the Processing development tool. The program code for Arduino and Processing can be downloaded [[:ru:Файл:Proc_and_ardu.zip | here]].
+
The next walking mechanism, now based on the Arduino platform, was assembled during the [http://fablab.spbstu.ru/2013/06/post750/ Summer Crash Course] for pupils in FabLab Polytech held at the end of June 2013 under the supervision of [[:ru:Andrey_Murachev|Andrey Murachev]] and [[:ru:Dzenushko_Dainis|Dainis Dzenushko]]. The Arduino board control was performed from a computer using the Processing development tool. The program code for Arduino and Processing can be downloaded [[:ru:Файл:Proc_and_ardu.zip | here]].
  
 
== See also ==
 
== See also ==

Latest revision as of 12:43, 7 August 2016

There are several basic types of "walking" mechanisms based on conversion of the rotational motion into the translational motion.


The Chebyshev Walking Mechanism[edit]

  • Pafnuty Lvovich Chebyshev, the professor of St. Petersburg University invented and built the world's first walking mechanism and named it "The Plantigrade Machine". This mechanism, invented by Russian mathematician, has received the general approval at the World Exhibition in Paris, 1878.

The Klann Mechanism[edit]

Klann 1.png Klann 2.gif Klann 3.gif

  • The Klann linkage provides many of the benefits of more advanced walking vehicles without some of their limitations. It can step over curbs, climb stairs, or travel into areas that are currently not accessible with wheels, but does not require microprocessor control or multitudes of actuators. It lays between these walking devices and axle-driven wheels.

The Theo Jansen Mechanism[edit]

  • Theo Jansen (born 1948) is a Dutch artist. In 1990, he began what he is known for today: building large mechanisms out of PVC that are able to move on their own, known only as Strandbeest. Jansen has been creating Strandbeest (Dutch: strand=beach; beest=beast), wind-walking examples of artificial life, since 1990. What was at first a rudimentary breed has slowly evolved into a generation of machines that are able to react to their environment: "over time, these skeletons have become increasingly better at surviving the elements such as storms and water, and eventually I want to put these animals out in herds on the beaches, so they will live their own lives."

http://www.strandbeest.com/

Creating a self-propelled platform based on the mechanisms of Theo Jansen[edit]

Watching the Theo Jansen mechanisms causes the desire to be able to ride on them (or to "walk"). So, I decided to create such a vehicle, which could move me (in a reduced scale, for the beginning). But if we want to ride it, first it should be able to turn left or right.

  • How to achieve it?

It is possible to make two independent parts with two independent motors, and by controlling their speed and direction separately turn as any crawler does.

  • Why this one is better than a wheeled vehicle?

If you're driving on sand or any loose terrain, the wheels may start to slip. But the walking mechanisms do not have this problem.

  • What has been done?

Currently, the manufacturing process has been developed and debugged.

  • How is it done?

This platform is created from acrylic, aluminum tubes, screws and nuts. In general, they are common materials. The materials chosen basing on the cheapness, the ease of use and aesthetic considerations. But it all started with a sketch of the parts in 1:1 scale. The sketches are presented below:


Then I had to deal with the first problem of this project, the friction. To decrease it, the simple slide bearings were made from aluminum tubes:

Here's how the first module looks like:

Here's how the first part looks like:

What is planned next?[edit]

1) manufacture the second module (DONE)

2) combine them (DONE)

3) mount motors(DONE)

4) develop a control system (DONE)

5) develop and install a remote control

06.10.11 at 23:58 the first successful launch of the combined mechanism had been performed Now the wired control system is set up. So that's what we have:

Walking mechanism 1.2[edit]

Intensiv.jpg

The next walking mechanism, now based on the Arduino platform, was assembled during the Summer Crash Course for pupils in FabLab Polytech held at the end of June 2013 under the supervision of Andrey Murachev and Dainis Dzenushko. The Arduino board control was performed from a computer using the Processing development tool. The program code for Arduino and Processing can be downloaded here.

See also[edit]

Walking mechanisms

Category: Student projects