An approach for experimental measurement of the dynamic characteristics of linear electromagnet actuators is presented. It uses accelerometer sensor to register the armature acceleration. The velocity and displacement of the moving parts can be obtained by integration of the acceleration results. The armature movement of permanent magnet linear actuator is acquired using this technique. The res...

The beam transverse emittance control and preservation in all the acceleration chain from the proton source to the 7TeV colliding beams is fundamental for ensuring high luminosity runs at the CERN Large Hadron Collider (LHC). This paper aims at discussing the emittance measurement methods and present status in the acceleration stages from the Proton Synchrotron Booster (PSB) injection at p=50Me...

Low frequency vibration occurs especially in ground transportation, either as a cause in adjacent environment or within the vehicle itself. The piezoelectric accelerometers commonly used for vibration measurement are not suitable, hence other sensors capable of measuring accelerations down to sub-hertz region have to be used. Based on some previous experience with MEMS acceleration sensors a th...

We determine transformations between coordinate systems which are mutually in linear accelerated motion. We also determine the transformations for rotating systems. In case of the symmetrical linear mutual acceleration, we immediately get the maximal acceleration limit which was derived by Caianiello from quantum mechanics. Maximal acceleration is an analogue of maximal velocity in special rela...