title: Long term plumb-line alignment of precise measuring instruments: an adaptive digital controller designed for an autoleveling platform.
authors.affiliation: Mechanical Division, Istituto Nazionale di Ricerca Metrologica, Torino 10135, Italy.
authors.forename: Giancarlo
authors.initials: G
authors.lastname: D'Agostino
authors.forename: Alessandro
authors.initials: A
authors.lastname: Germak
authors.forename: Giovanna
authors.initials: G
authors.lastname: Berrino