Optimum design of mounting components of a mass property measurement system

Mondal, Nripen; Acharyya, S. K.; Saha, Rana; Sanyal, Debarshi Kumar; Majumdar, Kamalesh

doi:10.1016/j.measurement.2015.10.017

Cited by 22 publications

(28 citation statements)

References 14 publications

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“…The moment of inertia of the measurement system is J us when the pico-satellite is not loaded, thus allowing us to determine the moment of inertia of the experimental value (J Gz ). According to Equations (18)- (20), the moment of inertia of the pico-satellite can be obtained when the coordinate origin is located at the center of mass. The comparison of the moment of inertia between the experimental and theoretical results of the pico-satellite is shown in Table 14.…”

Section: Measurement Of the Moment Of Inertia Of The Pico-satellitementioning

confidence: 99%

“…The results of the analysis show that the bifilar torsional pendulum method has a lower error than other methods. Mondal [20] designed and optimized a mass property measurement system; therein, the air bearing and flexure applied to the measurement system greatly improve the measurement accuracy. Zhai [21] presented a new method for designing the optimal excitation of identifying inertia parameters, and the simulation results showed that the calculated optimal excitation has a good performance index and can produce accurate identification results even when some perturbations are considered.…”

Section: Introductionmentioning

confidence: 99%

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Novel Measurement Method for Determining Mass Characteristics of Pico-Satellites

2018

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Abstract:The centroid and moment of inertia directly affect the dynamic characteristics of aircraft, and accurate mass characteristic measurements are crucial to adequately control aircraft attitude. This paper proposes a new measurement method for determining aircraft mass characteristics that can improve measurement precision when used in regard to pico-satellites. The measurement system is designed according to the principles of three-point measure and constant torque. The feasibility of the test method of this study for determining the mass characteristics is proved by using a dynamic simulation and an experimental analysis method. Through a number of standard workpiece tests, the deviation of the measurement system and effective compensation methods of the mass characteristics are obtained. The measurement system and compensation methods are applied to measure the mass characteristics of a pico-satellite, which can be detected by only one time clamping. The measurement system proposed herein can effectively improve measurement precision, as it was found that the accuracy of the centroid and the moment of inertia of the pico-satellite are less than 1 mm and 1.5 × 10 −2 kgm 2 , respectively. The proposed measurement system also has many advantages, such as a simple operation, high efficiency, small volume, and low cost.

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Section: Measurement Of the Moment Of Inertia Of The Pico-satellitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel Measurement Method for Determining Mass Characteristics of Pico-Satellites

2018

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“…Mass and Center of Gravity (CG) are prerequisite parameters when designing the dynamic performance of an aerospace vehicle, car, etc. [1,2]. When the shape of the vehicle is complicated, it is necessary to obtain mass and CG by experiments [3].…”

Section: Introductionmentioning

confidence: 99%

“…The mass can be achieved by weighing machines, for instance, load cells. There are several methods to measure the CG, which can be roughly classified into three categories as follows: (1) static method such as multi-point weighing method or unbalance moment method [1,4,5], (2) dynamic method such as spin balance method or inverted torsion pendulum method [6][7][8][9], and (3) other methods such as the photogrammetric technique for determination of the CG for large scale objects [10].…”

Section: Introductionmentioning

confidence: 99%

“…For instance, the multi-point weighing method, which uses three or more load cells to support a test platform, has been widely used, and the reason is that this method can measure the mass and CG simultaneously. This method only depends on gravity force acting through the CG, and CG location is calculated by static equilibrium from the reaction forces on the load cells [1,4]. Due to these reasons, it is the most suitable method for some massive objects [4], and it is also the cheapest automatic system.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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Measuring the mass and Center of Gravity (CG) of rigid bodies with a multi-point weighing method is widely used nowadays. Traditional methods usually include two parts with a certain location, i.e., a fixed platform and a mobile platform. In this paper, a novel structure is proposed to adjust the mobile platform for eliminating side forces which may load on the load cells. In addition, closed-form equations are formulated to evaluate the performance of the structure, and transformation matrices are used to estimate the characteristics of the structure. Simulation results demonstrate that repeatability of the proposed structure is higher than the traditional one and there are no side forces. Moreover, the measurement results show that the relative error of mass was within 0.05%, and the error of CG was within ±0.3 mm. The structure presented in this paper provides a foundation for practical applications.

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