A tuned mass damper, also known as a harmonic absorber, is a device mounted in structures to reduce the amplitude of mechanical vibrations. Their application can prevent discomfort, damage, or outright structural failure. They are frequently used in power transmission, automobiles, and buildings.(source:Wikipedia)
This 728 tons steel pendulum is installed in one of the world’s tallest buildings, the taipei 101 in Taiwan. It helps stabilize the building in case of strong winds and earthquakes, through simple mechanics, when the building moves in a direction it swings in the opposite direction reducing movement by 40%. You can understand how it works by looking at the small GIF image.
It cost $4 million to install the huge damper in the skyscraper but architects and engineers said it had to be done. It spans across 4 of the building’s stories and it was assembled on site because it couldn’t be lifted by a crane, due to its enormous weight.
Here’s a video of the damper in action, on May 12th,2008, when a horrific earthquake hit one of China’s provinces and the tremors reached as gar as Taipei. As the building started to shake, people ran towards the center to see the damper in action, it did it’s job.
I’ve been working on my master thesis and I’m finally seeing some progress in my project. I’m implementing a stereovision algorithm in a FPGA and it’s killing me.
Pictures shows results for synthetic images hard coded into the program. In the first picture there is a waveform taken from the simulator. Highlighted values match values displayed by hardware showed in the next three pictures.
The past two days I’ve spent on fixing interface part of this project (that is: handling buttons and display output and pausing the algorithm so I can read the results). The algorithm itself appears to be working correctly ever since it was valid for synthesis. :)
There is still a lot to do since presented algorithm operates on synthetic images (9 pixels wide and 9 pixels high) rather than from digital cameras. Also I need to use external RAM memory and said cameras. Some machine readable output would be nice too.
Finally, both Red Angry Bird/Luke Skywalker and Hedgehog are important parts of the science team ;)
The Controllino is a Kickstart project for an Arduino-based and compatible industrial programmable logic controller (PLC). The DIN rail mounted Controllino comes in three different varieties and can be programmed using the usual software, including Arduino sketches. It has connectors for direct access to MCU ports and you may use your old Arduino shields to expand its functionality.
I hope the founders can make this into a reality, expand its support and add an open-source hardware ecosystem and the marketing people at SIEMENS might just start to cry blood.
At the Palais de la Decouverte in Paris, a 1kg aluminium plate is levitated above a large coil of wire that is being supplied with 800A of alternating current at 900Hz.
Note the flare of the globes on the lamp when he moves it into the magnetic field and the steam coming off the surface - it’s also humming with the frequency of the alternating current. If you have time I recommend watching the video - it is very entertaining.