Online error compensation of moving-base rotating accelerometer gravity gradiometer

The Review of Scientific Instruments
Mingbiao Yu, Tijing Cai

Abstract

Imperfections in the factors of a rotating accelerometer gravity gradiometer (RAGG), such as accelerometer mounting errors, circuit gain mismatch, accelerometer linear scale factor imbalances, and accelerometer second-order error coefficients, make the RAGG susceptible to its own motion. These motion errors easily cause saturation of the RAGG so that it is unable to work normally. In this study, we propose a scheme for continually adjusting the linear scale factors or mounting angles of the accelerometers to reduce motion sensitivity and for generating a compensation signal based on an analytical model of the RAGG, to compensate motion errors. A numerical model of the RAGG is used to simulate a real imperfect RAGG to allow an online error compensation experiment to be performed. In the experiment, the mean and standard deviation of the air turbulence are 100 mg and 20 mg (1 g = 9.81 m/s2), respectively, and those of the angular velocity are 100 deg/h and 50 deg/h. It takes about 15 min for the RAGG online error compensation system to achieve convergence. In the converged state, the motion noise density of the RAGG is about 1 E/√Hz and scale factor balances of the order of 10-9 g/g are maintained. These experimental results sugg...Continue Reading

Citations


❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.