The Design of a Vehicle Inertia Measurement Facility

Heydinger, Gary J.; Durisek, Nicholas J.; Coovert, David A.; Guenther, Dennis A.; Новак, Сергій

doi:10.4271/950309

Cited by 36 publications

(7 citation statements)

References 8 publications

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“…Let us consider the ideal case in which all the quantities (both parameters and variables) are known without error and no aerodynamic forces are acting; this case is represented by Eq. (11). If the aerodynamic forces are acting on the system, Eq.…”

Section: Aerodynamic Effects On the Identification Of The Inertimentioning

confidence: 99%

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Method for the Measurement of the Inertia Properties of Bodies with Aerofoils

Previati

Mastinu

2012

Journal of Aircraft

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A method for the measurement of the inertia properties of bodies with aerofoils (such as spacecraft or aircraft) is dealt with. Two different test rigs have been realized and used to validate the proposed method. Each test rig is a spatial multicable pendulum carrying the body under investigation. The method is based on a simple procedure. The spatial pendulum is displaced from its rest configuration, and then a free motion evolves in a complex manner under the action of the gravitational field. The motion and the forces acting on the pendulum are measured, and then the inertia parameters are identified offline by a suitable and very quick numerical procedure. The proposed method does not require any dynamic excitation device, and it could be applied to measure the inertia properties of huge bodies, such as those pertaining to spacecraft or aircraft. The paper focuses particularly on how the aerodynamic forces acting on the body under investigation can influence the measurement uncertainties. Such a problem is of relevant importance for bodies with aerofoils (such as aircraft, spacecraft, or their subsystems). It is shown, both analytically and experimentally, that the developed method could be applied for the measurement of the inertia properties of full-scale aircraft or spacecraft. Nomenclature A= coefficients matrix of linear system a = acceleration B = known term of linear system f = generalized force g, h, k = general functions m = mass J = inertia tensor X = displacement x = unknown vector = rotation matrix , , = Cardan angles (roll, pitch, yaw) ! = angular velocity _ ! = angular acceleration

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Section: Aerodynamic Effects On the Identification Of The Inertimentioning

confidence: 99%

“…(11)]. If the aerodynamic forces were measured, B would be known and the exact solution x could be computed (no error would be introduced).…”

Section: Aerodynamic Effects On the Identification Of The Inertimentioning

confidence: 99%

Method for the Measurement of the Inertia Properties of Bodies with Aerofoils

Previati

Mastinu

2012

Journal of Aircraft

View full text Add to dashboard Cite

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“…10): (9) Another approach is to obtain the angular acceleration, , from the linear acceleration, F , at the point of application of the force: the acceleration measured by the accelerometer, the moment of inertia can be obtained from the gradient of the T -curve (Fig. 11).…”

Section: Pitch Moment Of Inertiamentioning

confidence: 99%

“…On the vehicle side, the design of a measurement facility to determine inertia parameters is discussed by Heydinger et al [9]. The facility consists of an oscillating platform equipped with pylons and a yaw/roll assembly that supports the platform during roll, yaw and roll-yaw product of inertia determination.…”

Section: Introductionmentioning

confidence: 99%

Experimental Determination of Moments of Inertia for an Off-Road Vehicle in a Regular Engineering Laboratory

Uys

Schalk

Thoresson

et al. 2006

International Journal of Mechanical Engineering Education

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Moments of inertia play a vital role in the motion of rigid bodies. Accurate information for moments of inertia is, however, not easily obtained for common bodies such as vehicles, aeroplanes, trains and humans. Presented in this text is a procedure, requiring minimal equipment expenditure, for the determination of the moments of inertia, for an off-road vehicle. The point of departure is rigid-body oscillation about a pivoting point, with a spring providing a restoring force. The moment of inertia about the pivoting point is then determined by both measuring the period of oscillation and calculating the gradient of the torque-angular acceleration curve. The results of the two methods for determining the pitch, roll and yaw moments of inertia of the body and chassis about the body's centre of gravity are compared. It is found that calculation is very sensitive to distance measurements and accurate determination of the position of the centre of gravity. The procedure gives results of adequate accuracy considering the experimental effort and costs involved.

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“…The crankshaft connecting rod type and the polygon transmission type are the improved solutions for better dynamic performance. Since the structures of the three types of pumps are different, the moments of inertia will not be equal, even under the condition of same output characteristics [7][8][9].…”

mentioning

confidence: 99%

Research on the rotational inertia of radial piston pump and the optimization method of the pump parameters

Guo

Zhao

Han

et al. 2014

11th IEEE International Conference on Control &Amp; Automation (ICCA)

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This paper aims to propose a method of optimizing the structure of radial piston pump from the aspect of reducing the rotational inertia. A modeling method based on basic dimensions and scale factors is developed. By using this method, three different types of radial piston pumps are studied. And the relative rotational inertia coefficient is adopted to evaluate the difference among them. Further study states that the relative rotational inertia coefficient changes along with the eccentricity ratio and the thickening factor. Finally a criterion is obtained, which could be used to optimize the structure and the dimensions of radial piston pumps.

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The Design of a Vehicle Inertia Measurement Facility

Cited by 36 publications

References 8 publications

Method for the Measurement of the Inertia Properties of Bodies with Aerofoils

Method for the Measurement of the Inertia Properties of Bodies with Aerofoils

Experimental Determination of Moments of Inertia for an Off-Road Vehicle in a Regular Engineering Laboratory

Research on the rotational inertia of radial piston pump and the optimization method of the pump parameters

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