DELTA JS, your partner for rotor dynamics.

We help our clients to solve problems and to become more efficient.



DELTA JS AG offers software, engineering and consulting services in the field of rotordynamics. Typically the company deals with high precision machines, whose functioning or service life is affected by even the smallest vibrations.

The program MADYN 2000 developed and offered by DELTA JS is a leading software for rotordynamics allowing to simulate complex rotor-gear-bearing systems with all types of bearings (spring and damper bearings, fluid film bearings, active magnetic bearings) and bearing supports.

The company disposes of powerful analysis tools to offer comprehensive engineering and consulting services in the area of rotor dynamics. The experience of DELTA JS covers a wide field of sophisticated machinery such as turbo machines for industrial applications, power generation and propulsion.

The next rotordynamic seminar including an additional day for the demonstration of practical rotordynamic analyses with MADYN 2000 will take place in Zurich from April 9th until 11th 2014. Registration forms are available here.
The next magnetic bearing seminar will be held in Zurich on June 4th and 5th 2014.
Registration forms are available here. Forms for 2014 will be ready soon.
Rotordynamic Software MADYN 2000
Versions 4.0 is distributed. It has many new features, among others the modelling of rolling element bearings and planetary gears. More details are explained in the release notes.
Rotordynamic Conference SIRM 2013 from February 25th to 27th 2013 in Berlin, Gemany:
DELTA JS (Joachim Schmied and Alexander Kosenkov) presented the paper "Practical controller design for rotors on magnetic bearings by means an efficient simulation tool". Moreover MADYN 2000 was used extensively in several papers at the conference (in a paper about the influence of casings and foundations as well as a paper about the behaviour of turbochargers).
Similar papers were presented at the ASME IGTI 2013 conference in San Antonio, Texas.

Decaying vibration

Decaying vibration


Achilles Qulification Stamp

Our comany is a qualified supplier in Achilles JQS - a Joint Qualification System for suppliers to the oil industry in Norway and Denmark.