The Piezo LEGS experiment is proposed by Piezomotor AB in Uppsala
There is an increasing interest from different space institutes and companies to use piezomotors in applications in space. In general the motors are expected to work well in this environment but in some cases the life time can be a question of interest. The absence of air makes the friction surfaces getting more wear otherwise. This can also be seen in high vacuum tests. Moreover it is of interest to confirm that the motors works well in the environment in other regards, such as radiation for example.
The purpose of the test is to follow the motors function over time (several months) to see the possible change of performance and the distance the motor can work.