and it has the arm 53 extended according to the direction x arranged perpendicularly to the electric board 18 itself obviously the accelerometer 51 can be also of the bidirectional or monodirectional type comprising two or only one piezoelectric film accelerometer respectively or it can be of the piezoresistive type or even of the capacitive variation type also called tunnel effect the accelerometer 51 according to the patterns being used provides one or more output signals which applied and suitably processed by the electronic board 18 allow the operation of the synchronous electric motor 3 to be suitably modified thus controlling the inertial forces of the tank 2 for example following the output signal a correction signal of the speed of the synchronous electric motor 3 or an alarm or stop signal can be generated according to the requirements and functionality of the washing machine 1 itself the continuous monitoring of the accelerometer 51 on the tank 2 and a continuous control on the output signal of the accelerometer 51 itself allow vibrations noise as well as the improper and bothersome displacements of the washing machine 1 to be avoided in the bud obviously different solutions of the present invention can be provided for example by using two accelerometers 51 positioned on the electronic board 18 one for detecting the acceleration forces of the tank 2 and one for accelerating the electronic board 18 and thus the structure of the washing machine.