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Simulation flight implementation method based on virtual reality

An implementation method and virtual reality technology, applied in the field of flight simulation, can solve the problems of strong dizziness and short imaging distance, and achieve the effect of reducing dizziness

Pending Publication Date: 2018-08-24
深圳视觉航空科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the short imaging distance of virtual reality leads to the problem of strong dizziness.

Method used

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  • Simulation flight implementation method based on virtual reality
  • Simulation flight implementation method based on virtual reality
  • Simulation flight implementation method based on virtual reality

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0027] As an implementation, step 4 includes:

[0028] Coordinate transformation sub-step: use the following formula to perform coordinate transformation on the angular displacement output by the high-pass angular velocity filter in the attitude angle:

[0029]

[0030] Among them, θ wh , and ψ wh is the attitude angle output by the high-pass angular velocity filter; θ aL and The attitude angle output for the low-pass acceleration filter.

[0031] As an implementation, step 4 includes:

[0032] Frequency limiting sub-step: use the following formula to limit the motion frequency in the flight parameters:

[0033]

[0034] Among them, k is the preset amplification factor, w x is the extreme value of flight simulation motion frequency, ε x is the damping ratio.

[0035] As an implementation, step 4 includes:

[0036] Low-frequency acceleration sub-step: use the following formula to obtain the high-pass acceleration channel:

[0037]

[0038] Among them, a b...

example 1

[0111] Example 1: Select a square wave signal as the input signal. Assuming that only an acceleration square wave signal is input in the z direction, after the washout algorithm, the acceleration, velocity, displacement and other curves of the moving platform are output. By analyzing these curves, we can clearly understand the process and advantages of the improved washout algorithm. figure 1 is the acceleration, displacement and elevation curves of the input and output.

[0112] exist figure 1 At 2s and 14s in (a), the acceleration signal changes suddenly, which is equivalent to a high-frequency acceleration signal. The signal passes through the high-pass acceleration channel, and the acceleration and displacement curve in the z-axis direction is output, such as figure 1 (b) and figure 1 (c) shown. figure 1 (d) simulated is figure 1 The low-frequency acceleration signal in (a) is converted into angular displacement through tilt coordination, and the slope is always kept a...

example 2

[0114] Example 2: Taking a set of real flight action curves as the analysis object, input a set of actual acceleration signals during the takeoff phase of the aircraft, such as figure 2 shown.

[0115] The flight simulation platform returns to the initial position in time after each sudden change in motion, and continues to accelerate at low frequencies. By converting the tilt coordination into angular displacement, the working space of the flight simulation platform is rationally utilized, and the feasibility of the improved washout algorithm is proved. Such as image 3 , Figure 4 shown.

[0116] Monitor data changes in real time through the display, record data through the flight simulation interface, and check whether the motion result exceeds the travel limit and meets the simulation requirements through the obtained data. It can be seen from Table 1.1, Table 1.2, and Table 1.3 that the obtained data meets the requirements of the flight simulation platform. Simulatio...

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Abstract

The embodiment of the invention discloses a simulation flight implementation method based on virtual reality, which is applied in a flight simulation platform. The flight simulation platform comprisesa simulation cockpit, a visual system, an avionics system, a flight control system and a six-degree-of-freedom motion platform. The method comprises the steps of: collecting control signals input byan aviator through the simulation cockpit; employing a flight dynamical model to provide corresponding flight parameters, and employing an illusory 4 visual system to perform transformation of coordinates of the flight parameters to convert the obtained motion parameters to parameters in the aviator's vestibule center coordinate system; performing coordination of autokinetic effects generated by angular motion and linear motion according to a linear coordination washout algorithm; and performing calculus inverse solution of the motion parameters according to a preset six-degree-of-freedom motion system inverse solution algorithm to calculate and control electric cylinder input parameters in the motion process of the platform, obtain the elongation of the electric cylinder, generate drive signals according to the elongation to drive the six-degree-of-freedom motion platform and achieve trained analog simulation flight.

Description

technical field [0001] The invention relates to the technical field of flight simulation, in particular to a virtual reality-based simulation flight realization method. Background technique [0002] Because the flight simulation platform has outstanding advantages such as safety, reliability, convenience, economy, high work efficiency, and not being restricted by weather conditions, it develops quite rapidly. Its history can be traced back to the 1920s. In the course of more than ten years of development, the flight simulation platform has gone through three stages of development: mechanical, electronic and digital. The motion system has gone through the development stages of single degree of freedom, two degrees of freedom, three degrees of freedom to six degrees of freedom, the control method has finally transitioned from mechanical and electronic to digital, and the training methods have changed from artificial and mechanical to full digital computer simulation type, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B9/08G06F17/50G06F3/01
CPCG06F3/011G09B9/08G06F2203/012G06F30/15G06F30/20G06F2119/06
Inventor 宋大巍
Owner 深圳视觉航空科技有限公司
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