A Structure for Accurately Determining the Mass and Center of Gravity of Rigid Bodies

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

doi:10.3390/app9122532

Cited by 13 publications

(11 citation statements)

References 13 publications

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“…As shown in Figure 9 , during the measurement process, the object being measured and the tooling are installed and fixed on inner disk 2, and the position of the measurement table is adjusted to the measurement position of the mass centroid through the measurement function-switching device. At this time, the steel ball positioning member is pressed on the weighing sensor by the steel ball of the centering assembly [ 20 ]. The output information of the weighing sensor and its position information are recorded, and the centroid of mass is measured according to the principle of moment balance.…”

Section: Methodsmentioning

confidence: 99%

General Mass Property Measurement Equipment for Large-Sized Aircraft

Zhang

Tang

et al. 2022

Sensors

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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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Section: Methodsmentioning

confidence: 99%

General Mass Property Measurement Equipment for Large-Sized Aircraft

Zhang

Tang

et al. 2022

Sensors

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“…In the large-scale metrology, Shi et al use photoelectric scanning measurement network to model dynamic errors [37]. Wang designed a structure for accurately determining the mass and center of gravity of rigid bodies [38]. Yang et al developed non-contact and real-time measurement of high strain rate Kolsky bar with temporal speckle interferometry [39].…”

Section: Other Measurement Systemsmentioning

confidence: 99%

Special Issue on Precision Dimensional Measurements

Fan

Chen

2019

Applied Sciences

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“…For example, Gopinath et al [2] used expensive air-bearing and accurate sensors for accurate measurement. The authors of [3] eliminated side force which may exist on the load cell by adding a ball groove and ball to each load cell. The authors of [4] proposed a flexible measurement technique by fusing data from two systems.…”

Section: Introductionmentioning

confidence: 99%

Combined EEMD with a Novel Flexible Wavelet Threshold Function for Weighing Signal Denoising Approach

et al. 2022

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This paper proposes a method of combining ensemble empirical mode decomposition (EEMD) with a novel flexible wavelet threshold function to reduce the random error in the weighing result that caused by the nonstationary and nonlinear noise in quality characteristic parameter measurement equipment. The original signal is first processed by EEMD, and then, all intrinsic mode functions (IMFs) are processed by a novel flexible threshold function proposed by this paper. Finally, the denoised signal is obtained by adding reconstructed IMFs and residual. Through theoretical analysis, the proposed threshold function can retain more useful information and have continuity at the segmentation point. Moreover, the addition of adjustable parameters makes it more adaptable. Its advantages are verified by comparing the denoised results with other threshold functions in the simulation model. In weighing experiment, the validity of the novel flexible threshold function in weighing signal denoising is verified, and the effectiveness of the proposed method is also quantitatively confirmed by comparing the random errors of the original signal and the denoised signal.

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A Structure for Accurately Determining the Mass and Center of Gravity of Rigid Bodies

Cited by 13 publications

References 13 publications

General Mass Property Measurement Equipment for Large-Sized Aircraft

General Mass Property Measurement Equipment for Large-Sized Aircraft

Special Issue on Precision Dimensional Measurements

Combined EEMD with a Novel Flexible Wavelet Threshold Function for Weighing Signal Denoising Approach

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