A sensitive micromachined resonant accelerometer for moving-base gravimetry

For inertial navigation systems (INS) on moving base, transfer alignment is widely applied to initialize it. Three velocity plus attitude matching methods are compared. And Kalman filter is employed to evaluate the misalignment angle. Simulations under the same conditions show which scheme has excellent performance in precision and rapidness of estimations.

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Two Groups of Chaotic Vibrations in a Single-Degree-of-Freedom Maglev System

Volume 1C: 16th Biennial Conference on Mechanical Vibration and Noise ◽

10.1115/detc97/vib-4112 ◽

1997 ◽

Author(s):

Zhixiang Xu ◽

Hideyuki Tamura

Keyword(s):

Magnetic Levitation ◽

Excitation Frequency ◽

Power Spectra ◽

Period Doubling ◽

Excitation Amplitude ◽

Degree Of Freedom ◽

Single Degree Of Freedom ◽

Single Degree ◽

Moving Base ◽

Period Doubling Bifurcations

Abstract In this paper, a single-degree-of-freedom magnetic levitation dynamic system, whose spring is composed of a magnetic repulsive force, is numerically analyzed. The numerical results indicate that a body levitated by magnetic force shows many kinds of vibrations upon adjusting the system parameters (viz., damping, excitation amplitude and excitation frequency) when the system is excited by the harmonically moving base. For a suitable combination of parameters, an aperiodic vibration occurs after a sequence of period-doubling bifurcations. Typical aperiodic vibrations that occurred after period-doubling bifurcations from several initial states are identified as chaotic vibration and classified into two groups by examining their power spectra, Poincare maps, fractal dimension analyses, etc.

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Limiting Vibroisolation Control of an Oscillating String on a Moving Base

Shock and Vibration ◽

10.1155/1995/203067 ◽

1995 ◽

Vol 2 (2) ◽

pp. 163-171 ◽

Cited By ~ 1

Author(s):

Dmitry V. Balandin

Keyword(s):

Solution Method ◽

Solution Technique ◽

Quadratic Functional ◽

Numerical Example ◽

Guaranteed Quality ◽

Moving Base ◽

Elastic Object

The vibroisolating capability of an elastic object that is assumed to be protected against a class of excitations is studied. It is proposed that this capability be estimated by a quadratic functional. The solution method gives an estimate of the optimal isolation with a criterion of minimum guaranteed quality. A numerical example of the solution technique is presented.

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Moving-Base Space Robots—Applying Eigen-Dynamics of a Reduced System to Synthesize Controls

Studies in Systems, Decision and Control - Robotics: Industry 4.0 Issues & New Intelligent Control Paradigms ◽

10.1007/978-3-030-37841-7_14 ◽

2020 ◽

pp. 171-180

Author(s):

Pavel P. Belonozhko

Keyword(s):

Base Space ◽

Space Robots ◽

Moving Base

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Earthquake response of adjacent structures with viscoelastic and friction dampers

Theoretical and Applied Mechanics ◽

10.2298/tam1504277z ◽

2015 ◽

Vol 42 (4) ◽

pp. 277-289

Author(s):

Miodrag Zigic ◽

Nenad Grahovac

Keyword(s):

Energy Dissipation ◽

Fractional Derivatives ◽

Viscoelastic Body ◽

Dynamical Behaviour ◽

Friction Damper ◽

Adjacent Structures ◽

Moving Base ◽

Earthquake Model ◽

Horizontal Ground Motion ◽

Fractional Zener Model

We study the seismic response of two adjacent structures connected with a dry friction damper. Each of them consists of a viscoelastic rod and a rigid block, which can slide without friction along the moving base. A simplified earthquake model is used for modeling the horizontal ground motion. Energy dissipation is taken by the presence of the friction damper, which is modeled by the set-valued Coulomb friction law. Deformation of viscoelastic rods during the relative motion of the blocks represents another way of energy dissipation. The constitutive equation of a viscoelastic body is described by the fractional Zener model, which includes fractional derivatives of stress and strain. The problem merges fractional derivatives as non-local operators and theory of set-valued functions as the non-smooth ones. Dynamical behaviour of the problem is governed by a pair of coupled multi-valued differential equations. The posed Cauchy problem is solved by use of the Gr?nwald-Letnikov numerical scheme. The behaviour of the system is analyzed for different values of system parameters.

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Analisis Perbaikan Proses Shipping Kursi Mobil Dalam Upaya Mengurangi Frekuensi Terjadinya Delay Delivery

JIE Scientific Journal on Research and Application of Industrial System ◽

10.33021/jie.v4i1.743 ◽

2019 ◽

Vol 4 (1) ◽

pp. 1

Author(s):

M Yani Syafei ◽

Andi Muhamad Yusuf

Keyword(s):

Customer Satisfaction ◽

Production Process ◽

Six Sigma ◽

Automotive Sector ◽

Roller Conveyor ◽

Car Seats ◽

Temporary Storage ◽

Moving Base ◽

A Company

PT. FSI is a company engaged in the automotive sector. Increased demand and efforts to meet customer satisfaction, then encouraging companies to continue to make various improvements including the shipping department, which is to facilitate the delivery of products to customers. One of the causes of the delay in the delivery of products to customers (delay delivery) is that there is a problem in the pre-delivery process, namely the storage conveyor machine. A storage conveyor machine is a machine that connects from the results of the production process to the temporary storage of goods which are then put into trucks to be sent to consumers.<br />The objective achieved in this study was to analyze the causes of the delay delivery in the process of shipping car seats on conveyor storage machines and make improvements to reduce the jammed base pallet frequency on the storage conveyor machine using the six sigma method. Based on the results of the research and analysis that have been carried out, it turns out that the case of the jammed base pallet on the conveyor storage machine is the cause of delay delivery to the customer and then make improvement to overcome or reduce the frequency of jammed base pallet problems on the storage conveyor machine by adding sponges to the shaft roller conveyor. The addition of sponge rolls is intended to increase power when moving base pallet between stations.

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