Simulation Platform for SINS/GPS Integrated Navigation System of Hypersonic Vehicles Based on Flight Mechanics

Abstract

In this study, a simulation platform for an integrated navigation algorithm for hypersonic vehicles based on flight mechanics is designed. In addition, the generation method of inertial measurement unit data and satellite receiver data is introduced. First, the interface relationship between a high-precision six-degree-of-freedom (6DoF) model and the simulation platform in the launch-centered Earth-fixed frame is introduced. Three-axis theoretical specific force and angular velocity are output by the 6DoF model. Accelerometer and gyroscope error models are added, and integral processing of the specific force and angular velocity is performed to obtain velocity increment of the accelerometer and the angular increment of the gyroscope. These data are quantified to obtain the accelerometer and gyroscope pulses. The satellite’s pseudo-range and pseudo-range rate as well as its position and velocity are obtained from the theoretical position, velocity, the attitude of the hypersonic vehicle’s 6DoF model output, and the global positioning system (GPS) satellite broadcast ephemeris. The simulation data can be used for the verification of the loose and tight coupling integrated navigation algorithms. The simulation test verifies the accuracy of the designed method.

Copper Mediated Chemo‐ and Stereoselective Cyanation Reactions

“…The resulting CF 3 -containing amines and imines find application in synthesizing several pharmaceuticals and agrochemicals (See Figure 130). [135] The C3-cyanation of indole was performed for both free N-H and N-protected indoles by TMEDA and ammonium carbonate using copper-based catalytic material under aerobic conditions at 110 °C using DMSO as solvent. Mechanistic studies reveal that the reaction proceeded by the reaction of aldehydes and ammonium ions,to form the corrosponding3-cyano indoles under aerobic conditions tolerating a broad range of substrates (See Figure 131).…”

SINS/BDS Integrated Navigation for Hypersonic Boost-Glide Vehicles in the Launch-Centered Inertial Frame

“…We propose a classic boost-glide flight trajectory [22,23]. e equation describing this trajectory is detailed in [22], and the trajectory data are obtained from the simulation platform in [23].…”

Design and Implementation of a New Training Flight Simulator System

“…The flight scenes required by the flight software to produce the visual effect, the realistic scenery and the realistic aircraft dynamics, and the shock of sound and light, provide people with an immersive flight experience. Ground flight simulation can not only save the cost of real aircraft flight, but also ensure the safety of humans and machines, and achieve the purpose of training pilots [ 2 ].…”

“…In addition, some sensors were installed at the middle of platform to acquire motion status to track and monitor the performance evaluation. To the best of our knowledge, the ideas we mention have not been presented in previously published papers [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. As a result, this paper presents some new ideas in terms of kinematics and a motion-cueing algorithm, the servo motion is executed by the programmable controller, and the commands are read and received through the Ether-CAT communication port to achieve synchronous simulation.…”