A flexible measurement technique for testing the mass and center of gravity of large-sized objects

Zhang, Xiaolin; Wang, Meibao; Tang, Weijun; Wang, Jun

doi:10.1088/1361-6501/ab39ee

Cited by 12 publications

(15 citation statements)

References 13 publications

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“…Similar experimental set-ups can be found in the literature, which are limited to three rods [9,10] or three load cells [11,12]. Zhan et al [13] report solutions to measure extremely large cylindrical objects with two rail-based measurement devices each including four load cells. Suhaimi et al [14] present an example application of the investigation of a heavy duty vehicle deploying a mobile crane to lift and hold the armoured vehicle.…”

Section: Introductionmentioning

confidence: 89%

Accuracy Analysis of the Measurement of Centre of Gravity and Moment of Inertia with a Swing

et al. 2021

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Floating devices under wave and current loads are typically designed based on numerical methods followed by a validation with experimental investigations. This allows an independent check due to the comparison of two different modelling approaches based on different assumptions. At an early stage of the project, numerical simulations are based on theoretical (ideal) values of the centre of gravity (CG) and moment of inertia (MI). The building process of a scaled model results very often in a requested simplification of certain parts, which can influence the CG and also the MI of the scaled model. Knowing those discrepancies allows us to improve the comparability of both approaches but the measurement of those values is connected with either a higher uncertainty or a high level of effort. A significant improvement of such measurements can be reached by the deployment of a specific experimental set-up. This paper presents the classification of the newly designed swing with a high accuracy inertial inclinometer, which was verified by the marker-based motion capturing system. The achieved experiences are useful for the future use of the set-up as well as similar investigations. The comparison with the theoretical values for the swing as well as an example model showed very good agreements and a high accuracy of few millimetres for the CG and an error smaller 1% for MI.

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Section: Introductionmentioning

confidence: 89%

Accuracy Analysis of the Measurement of Centre of Gravity and Moment of Inertia with a Swing

et al. 2021

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“…Meanwhile, the research on the influence and compensation of product pose error on the measurement results is also rare. Finally, in practical applications, due to the limitation of the versatility of the measurement equipment, in order to meet the measurement requirements of different models of aircraft, it is necessary to redesign and process for individual models of aircraft, which causes great production costs [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Research on the Pose Error Compensation Technology for the Mass and Centroid Measurement of Large-Sized Aircraft Based on Kinematics

Zhang

Wang

et al. 2023

Sensors

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The accurate measurement of mass and centroid is indispensable for accurate control of aircraft. In order to eliminate the influence of assembly error and product pose error on the measurement results, a multi-station measurement idea that can self-compensate for the geometric parameter error is proposed in this paper based on. At the same time, the kinematic model of the mechanical structure of the measurement equipment is established to prove the effectiveness of the structure in error compensation theoretically, and the experimental verification of the standard part and aircraft is carried out. The test results show that the measurement results using the idea of the multi-station compensation measurement are significantly better than those of the more common methods, with the mass measurement accuracy of 0.03% and the centroid error within ±0.15 mm, meeting the requirement of high precision measurement for the mass properties.

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“…Mass is a measure of the inertia of an object, and the centroid is the geometric point of equivalent mass distribution. The measurement deviation of the centroid affects the dynamics modeling of the aircraft and the accuracy of the scalar equation of kinematics, which ultimately affects the flight trajectory of the aircraft [ 1 , 2 , 3 , 4 , 5 ]. The MOI is the measurement of the rotational inertia of a rigid body and plays a key role in the attitude control of aircraft in the air [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

“…In practical applications, it is usually necessary to measure multiple mass properties of the same product under test. The general method is to measure the centroid and MOI using a mass center measurement device and an MOI measurement device, respectively, for different measured parameters [ 2 , 7 ]. The parameters of the mass and centroid can be measured by inertial measurement, multi-point weighing, a compound pendulum or a three-wire pendulum, and other experimental testing methods.…”

Section: Introductionmentioning

confidence: 99%

General Mass Property Measurement Equipment for Large-Sized Aircraft

Zhang

Tang

et al. 2022

Sensors

Self Cite

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The accurate measurement of aircraft mass properties, such as the mass, centroid, and moment of inertia (MOI), plays a key role in the precise control of aircraft. In order to obtain high-precision information on the parameters of the mass, centroid, and MOI of an aircraft using a single instrument, an integrated mass property measurement system was developed in this study by analyzing and comparing the latest technologies, especially the function-switching device, which switches the measurement states between the center of mass and the MOI. The purpose of mass property measurement was achieved through single clamping. In addition, the system has strong versatility and expansion and can be used with different tooling or adapter rings to measure the mass properties of aircraft with different shapes. In this paper, the main mechanical structure of the measurement system, the measurement method of relevant mass parameters, and the solution method of the transformation matrix are introduced, and the standard parts and the aircraft were verified experimentally. The test results showed that the mass measurement accuracy was 0.03%, the centroid measurement error was within ±0.2 mm, and the measurement accuracy of the MOI was within 0.2%, all of which meet the high-precision measurement requirements for the mass properties.

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A flexible measurement technique for testing the mass and center of gravity of large-sized objects

Cited by 12 publications

References 13 publications

Accuracy Analysis of the Measurement of Centre of Gravity and Moment of Inertia with a Swing

Accuracy Analysis of the Measurement of Centre of Gravity and Moment of Inertia with a Swing

Research on the Pose Error Compensation Technology for the Mass and Centroid Measurement of Large-Sized Aircraft Based on Kinematics

General Mass Property Measurement Equipment for Large-Sized Aircraft

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