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3315. A New Test Rig for the Identification of the Inertia Tensor of a Rigid Body
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Title | 3315. A New Test Rig for the Identification of the Inertia Tensor of a Rigid Body |
Publication Type | Conference Paper |
Paper Number | 3315 |
Year of Publication | 2003 |
Authors | Mastinu, Gobbi, and Previati Giorgio |
Paper Category | 6. INERTIA MEASUREMENTS |
Conference | 62nd Annual Conference, New Haven, Connecticut |
Conference Location | New Haven, Connecticut |
Publisher | Society of Allied Weight Engineers, Inc. |
Date Published | 5/17/03 |
Abstract | A new method for measuring the inertia tensor of rigid bodies has been developed and applied. A new test-rig, based on the developed method, has been built. The test-rig is basically a three- or four-bar pendulum, carrying the rigid body under investigation. The pendulum is excited either by well defined initial conditions or by a harmonic force. The spatial motion of the pendulum is highly non linear and is recorded by means of accelerometers and gyroscopes. The components of the inertia tensor are identified by a proper numerical procedure which makes use of a mathematical model describing the motion of the pendulum. A proof of the convergence of the identification procedure is given. A validation of the measuring procedure is presented. The maximum error on the main diagonal components of the inertia tensor is less than 0.7%. Further improvements on the precision of the measurement procedure are possible. The rig has been used to measure the inertia tensor of a number of road vehicles and other bodies. |
Pages | 18 |
Key Words | 06. Inertia Measurements |
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