Cycloïd-E by Andre and Michel Decosterd06/06/2012
Cycloïd-E is a sound/kinetic sculpture created by brothers Andre and Michel Decosterd in 2009. The sculpture is made up of five metallic tubes equipped with sound sources and with measuring instruments capable of making them resonate according to their rotations, creating a hypnotic and alien dance/sound sequence. The brothers explain, below:
"We started experimenting with the pendulum, which is at the basis of mechanical oscillating circuits. Because of its constant period, it represents in a way the harmony in the exchanges between kinetical and potential energies. A pendulum only consists in a mass at the end of an arm. To increase the diversity of the movement and obtain an object with more visual and sound attractiveness, we linked a number of pendulums with each other so that they would move in the same plane. In order to cancel the effect of gravity, the end of this chain was fixed to a vertical axis, with the chain moving in a horizontal plane. The arm segments of the arm were slightly staggered to allow them to superimpose each other while rotating so that the chain may cover the complete surface of a circle. Since gravity has no longer an effect on the movement, a central engine gives impulsions, which produce the global movement. As a consequence, we obtain a system that does no longer move in a determined fashion, but in a chaotic, unforeseeable way..."
"The music - The articulated arm of cycloïd produces music. The quicker its movements, the louder, enriched and brilliant the spectral tone becomes. The music expresses the mood of the machine, for example with an orchestral scream. Each part of the arm is an instrument which produces its own sounds depending on its activity..."
"Structure and measuring device - The technical realisation of the structure is complex. The random dynamic of the structure generates a number of forces with a wide variety of amplitudes and directions, which are very difficult to calculate. Centrifuge forces exerted on the arm during a rapid extension of the system generate shocks followed by oscillations which, given the importance of the mass of the structure, can enter into resonance and compromise the fluidity of the movements. The articulations must have a great rigidity to withheld eventual shocks. The choice of material for the arm was dictated not only by factors of static and dynamic resistance but also by the material’s vibratory characteristics since the segments play a role as sound interface..." - Andre and Michel Decosterd
Follow the source below for a video of Cycloïd-E in action.
Source - Triangulationbolg