A leveling system for a missile system includes a holder defining an xz-plane. Four flexure plate accelerometers are coupled to the holder at angles such that they are sensitive to movement in an xy-plane. The accelerometers all generate signals in response to movements of the flexure plates. An actuator...http://www.google.com/patents/US7137208?utm_source=gb-gplus-sharePatent US7137208 - Leveling device