Semi-physical simulation verification technology with rotary table based on differential equation solution

Abstract

The invention discloses a semi-physical simulation verification technology with a rotary table based on differential equation solution, belongs to the field of aircraft control simulation, and relates to a semi-physical simulation test of projectile motion around the center and with a rotary table. The three-axis angular velocity of a projectile body is obtained by resolving a projectile body model, three components of the earth rotation angular velocity under a rotary table emission system are resolved through the latitude of the place where a rotary table is located and the inner axis direction of the rotary table, and a conversion matrix of an inertial unit from a theoretical system to an actual system is resolved through a measured installation error angle of the inertial unit on the rotary table; and finally, a differential equation set of the rotation angle of the rotary table is solved through a driving equation of the rotary table, the obtained conversion matrix and other information, and finally three rotation angles of the rotary table are obtained by solving the differential equation set. When the technology provided by the invention is adopted to carry out semi-physical simulation verification, a method error can be reduced to a great extent, precision of semi-physical simulation is improved, performance of an inertial measurement unit and performance of a flight control system are better verified, the dependence degree of semi-physical simulation on the type of a rotary table can be reduced, and the method has wider applicability.

Description

technical field [0001] The invention relates to a half-in-the-loop simulation verification technology with a turntable based on solving differential equations, which belongs to the field of aircraft control simulation, and relates to an aircraft orbiting motion model, a drive equation of a turntable, and half-in-the-loop simulation of an attitude control system. Background technique [0002] In the hardware-in-the-loop simulation of flight control systems such as missiles and arrows, the turntable that matches the rotation sequence used to define the attitude angle is generally used for verification. For example, if the mathematical simulation model, flight control, navigation, etc. all use the attitude angle defined by the 3-2-1 sequence, then generally use a horizontal three-axis turntable for hardware-in-the-loop simulation; if the mathematical simulation model, flight control, navigation, etc. Both use the attitude angle defined by the 2-3-1 sequence, and generally use a...

AI Technical Summary

Problems solved by technology

[0004] When considering the three factors of non-matching turntable, earth rotation, and inertial group installation deviation, the conventional method of turntable rotation angle will make the simulation accuracy of hardware-in-the-loop worse. At this time, it is necessary to recalculate the actual rotation angle of the turntable to improve Simulation accuracy

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