RUDN scientists have developed a new method for determining the orientation of objects in the antenna complex based on measurements of a strapdown inertial system
It is established that modern methods for determining orientation using measurements of satellite navigation systems or inertial orientation systems do not provide the required accuracy for solving the problem of orientation of large or medium-sized objects. In this regard, a new dynamic algorithm for estimating stochastic orientation parameters has been developed that is invariant to the nature of the base movement and provides stability and the required accuracy of estimation under the most General assumptions about the nature of interference of sensitive elements of a strapdown inertial orientation system built on the basis of WSG. The Rodriguez-Hamilton parameter vector is used as the observed vector of orientation parameters, and the accelerometer output signal is proposed to be used as its observer. Based on the stochastic nonlinear equations of the vector of parameters of the current orientation and the equations of stochastic models of accelerometer output signals constructed for the most General case of object motion, a generalized Kalman filter was formed that provides a General solution to the problem of estimating the orientation parameters of an arbitrary structure on a movable base. The results of numerical simulation confirmed the possibility of using the developed method for solving the problem of high-precision orientation determination without correction from global satellite navigation systems over a long time interval.
An article in the journal Measurement techniques.
Biologists from RUDN University working together with their colleagues from the Institute of Molecular Biology of the Russian Academy of Sciences and the Institute of Flax studied the genes that determine the fatty acid composition in flaxseed oil and identified polymorphisms in six of them. The team also found out what gene variations could extend the shelf life of flaxseed oil. This data can be used to improve the genetic selection of new flax breeds. The results were published in the BMC Plant Biology journal.
The soils of urban gardens and vegetable patches contain a lot of toxicants (including lead and arsenic) in high concentrations which can be harmful to the health of children and people with chronic diseases. A team of soil scientists from RUDN University suggested a remediation method developed based on data collected in a garden of Brooklyn (NY, U.S.).
Biologists from RUDN University working together with their colleagues from the Institute of Molecular Biology of the Russian Academy of Sciences and the Institute of Flax studied the genes that determine the fatty acid composition in flaxseed oil and identified polymorphisms in six of them. The team also found out what gene variations could extend the shelf life of flaxseed oil. This data can be used to improve the genetic selection of new flax breeds. The results were published in the BMC Plant Biology journal.
A team of biologists analyzed soil samples from a pasture and a regularly mowed meadow and found out that grazing lets more carbon get into the soil than mowing. This, in turn, improves the carbon cycle and makes microorganisms more efficient.
The soils of urban gardens and vegetable patches contain a lot of toxicants (including lead and arsenic) in high concentrations which can be harmful to the health of children and people with chronic diseases. A team of soil scientists from RUDN University suggested a remediation method developed based on data collected in a garden of Brooklyn (NY, U.S.).