FPGA-based Backup Display Instrument for Aircraft

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FPGA-based Backup Display Instrument for Aircraft

Zhang fan, Yu Yuhao, Cheng Zhang, Zhang xiaoning (Mentor)

Xi’an Jiaotong University

 

Overview

 

This work has designed a backup display instrument based on FPGA that can be used under extreme conditions to provide attitude angle and orientation information. The satellite navigation and positioning information of the aircraft or aircraft is vulnerable to the harsh electromagnetic environment and electronic interference from the enemy, resulting in partial or complete failure of the navigation and positioning system. The driver cannot obtain the current flight or navigation information, enters the trek state, and is prone to fall. The backup instrument display system acts as a set of emergency systems that are relatively independent and undisturbed from navigation systems and equipment such as on-board satellites. They can provide the driver with a set of essentials for flight or navigation in the event of an in-flight navigation system failure.

The hardware of this project is characterized by an inertial sensor, an FPGA chip, and LCDs. The inertial sensor outputs measurement data of the gyroscope, accelerometer, and magnetometer. Through the calculation of the FPGA, the information of the three attitude angles of the current roll angle, the pitch angle and the yaw angle is obtained. The graphics are drawn by the image generation module in the FPGA, and finally output to the LCD display.

The innovation point of this work is:        

1.Using the idea of combining quaternion and Mahony algorithm, the spherical calibration data is fused, so that the attitude resolution accuracy is greatly improved.

2.The idea of layered generation of graphics is not required, and no complicated GPU is needed. The dedicated chip, based on the parameterization idea, designs a dedicated image generation module based on FPGA, which greatly reduces the image generation time and realizes the real-time requirement of display.

3.Anti-aliasing of arcs, lines, characters and other graphics in the generated image significantly reduces aliasing, eliminates voids, and improves the quality of image display.

4.By optimizing and perfecting the design, the accuracy of the attitude calculation can be further improved, and the parameterized layer generation can be realized. The method, and the attitude solving module and the graphic generating module are designed as IP cores that can be directly called, and can be streamed as a dedicated backup instrument IC.

System Architecture

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Design Demonstration

 

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2019年3月12日 09:55
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