@conference {3612, title = {3612. Measurement of the Inertia Tensor - A Review}, booktitle = {73rd Annual Conference, Long Beach, California}, year = {2014}, month = {05/2014}, pages = {23}, publisher = {Society of Allied Weight Engineers, Inc.}, organization = {Society of Allied Weight Engineers, Inc.}, address = {Long Beach, California}, abstract = {This paper is focused on the measurement of the full inertia tensor of a rigid body. In the literature, many papers can be found addressing this problem. Basically, two different measurement approaches are used. In the first approach, different moments of inertia around different axes are measured and then the inertia tensor is reconstructed from these measurements. In this case, the measurement of the moment of inertia around a given axis can be performed with very high accuracy. In the reconstruction of the inertia tensor is, however, some uncertainty is introduced due to the positioning of the rotation axes with respect to the body. The second measurement approach involves the realization of a test rig able to apply a complex motion to the body under investigation. By a proper measurement of the motion and a suitable mathematical procedure, is possible to derive all the components components of the inertia tensor from a single experiment. Sometimes, the motion is reduced to a vibration of small amplitude and the inertia tensor is derived from a modal analysis. The experimental techniques referring to such two strategies are presented and the underlying theoretical and mathematical aspects involved are discussed.}, keywords = {05. Inertia Calculations, 06. Inertia Measurements, 32. Product of Inertia Measurement}, url = {https://www.sawe.org/papers/3612/buy}, author = {Giorgio Previati and Gobbi, M. and Mastinu, G.} } @conference {3500, title = {3500. Technical Feasibility Study for the Measurement of the Inertia Properties of an Aircraft}, booktitle = {69th Annual Conference, Virginia Beach, Virginia}, year = {2010}, month = {05/2010}, pages = {21}, publisher = {Society of Allied Weight Engineers, Inc.}, organization = {Society of Allied Weight Engineers, Inc.}, address = {Virginia Beach, Virginia}, abstract = {A feasibility study for the measurement of the inertia properties of a full-scale aircraft is presented. The employment of the InTenso+ system developed at Politecnico di Milano is discussed referring to the measurement of the inertia properties of a fighter aircraft. Preliminarily, the InTenso+ system is introduced to highlight its basic features. Then, referring to the addressed non standard aeronautic application, the accuracy of the measurement method is investigated. Both analytical and numerical analyses are presented to estimate the uncertainties of the measurement method. The measurement of the inertia properties of a full scale aircraft is technically feasible within the accuracy quantified in this report. Economic and financial issues are not critical, being the InTenso+ system very simple and consequently inexpensive (the implementation costs are not given in this paper as they depend on the customization of the system). The main result of this paper is that, maybe for the first time since the beginning of aeronautical engineering, the measurement of the full inertia tensor and of the location of the centre of gravity of aircrafts appears feasible in a simple way. Such a measurement can be performed by using the InTenso+ system.}, keywords = {03. Center Of Gravity, 06. Inertia Measurements, 32. Product of Inertia Measurement}, url = {https://www.sawe.org/papers/3500/buy}, author = {Giorgio Previati and Mastinu, G. and Gobbi, M.} } @conference {3414, title = {3414. A Reconfigurable Body for Assessing the Uncertainties Related to the Measurement of Inertia Properties}, booktitle = {66th Annual Conference, Madrid, Spain}, year = {2007}, month = {5/28/2007}, pages = {22}, publisher = {Society of Allied Weight Engineers}, organization = {Society of Allied Weight Engineers}, type = {6. Inertia Measurements}, address = {Madrid, Spain}, abstract = {The paper presents the design of a reconfigurable body to be taken as the reference body for assessing the uncertainties related to the measurement of inertia properties of rigid bodies. The presented reconfigurable body can be used for the calibration of any rig for measuring the inertia properties of rigid bodies, particularly for the InTenso system of the Politecnico di Milano. The body is composed of a plate, three columns, and a set of masses (disks) that can be arranged in several ways. By changing the position of the columns and the number and the position of the disks along the columns, the mass, the center of gravity (C.G.) location, and the inertia tensor of the body can be modified in whichever fashion. The simple shape of the body components and the construction accuracy allow the difference between the actual inertia properties of the assembled body and the corresponding computed nominal values to be maintained within 0.10 \%. The reconfigurable body mass can span from 120 to 500 kg and the diagonal components of the inertia tensor may vary between 9 and 100 kgm2.}, keywords = {06. Inertia Measurements}, url = {https://www.sawe.org/papers/3414/buy}, author = {Pennati, M. and Mastinu, G. and Gobbi, M.} }