A virtual flight test is the process of flying an aircraft model inside a wind tunnel in a manner that replicates free-flight.In this paper, a 3-DOF aircraft-manipulator system is proposed that can be used for longitudinal dynamics virtual flight tests.The system sara stedy price consists of a two rotational degrees-of-freedom manipulator arm with
A New Bias Error Prediction Model for High-Precision Transfer Alignment
The purpose of this work was to study bias error in acceleration-based transfer alignment, which is probably caused by cross-correlation between the dynamic lever-arm and the linear motion of a ship.A new windhut prediction model for the cross-correlation-caused error is proposed in this paper.We adopt the Bernoulli-Euler Beam as a simplified ship
On dark matter and dark energy
The dark matter hypothesis was created to explain the reason for the preservation of stellar clusters from dispersion.The weak point of this hypothesis zippity dew dab is the great age of space, which is 13.8 billion years.Based on experimental data, it is shown that the age of space does not exceed 10 thousand years.In this case, the hypothesis of
Comorbidity of Migraine
Migraine is a common neurological disorder and can cause tenma vineyard severely disabling during attacks.The highest prevalence occurs between the ages of 25 and 55 years, potentially the most productive period of life.Migraine leads to a burden not only to the individual, but also to the family and society.Prior studies have found migraine occurs