Since the reform and opening up, my country's national economy and science and technology have made great progress, and informatization, industrial maturity and automation have continued to deepen, which has greatly enhanced the country's comprehensive strength and demonstrated its status as a major country in the world. In the current historical period of the development and transformation of the technology industry, a series of policies such as "Industry 4.0" and "Made in China 2025" to accelerate the transformation and upgrading of my country's manufacturing industry and improve the core competitiveness of the manufacturing industry are promoting the steady growth of the overall level of the manufacturing industry. improve. On May 29 this year, the C919, known as my country's "Pearl in the Crown of Industry", made its first commercial flight, marking the accelerated formation of technological innovation and advanced manufacturing ecology centered on the aviation industry.
As the most critical component of the current aircraft, the highly modular and integrated airborne integrated avionics system undertakes many responsibilities such as aircraft status monitoring and display, pilot human-computer interaction, etc., and is the core element that determines the stability and maneuverability of the aircraft.
The display control and display module is an important part of the avionics system. It is composed of a multi-function display (MFD), a primary flight display (PFD), an engine information display (EICAS) and other parts, and can provide pilots with intuitive and clear information on various avionics systems. Electronic information display is also the means for pilots to control and manage the avionics system, and is an important guarantee for the safe operation of aircraft. However, display control and display software often have a large code size and complex interaction logic. The challenges faced by the test of display control software are particularly severe, and it has been impossible to fully rely on the traditional semi-physical environment that relies heavily on complex hardware. The following scenarios are actually happening:
- The cost of hardware is high and the floor area is large. The test bench and supporting facilities of a single device can occupy tens of square meters, and the number of hardware is scarce.
- Due to the small amount of hardware, in the case of shared equipment for development and testing, the test faces the dilemma that there is almost no right to use the equipment and can only be tested on ordinary Windows computers. The test efficiency is low, the cycle is long, and the test results are not true; At the same time, although developers can use real hardware, they are still faced with the dilemma of high labor intensity and 24-hour scheduling due to the pressure of progress.
The longer development cycle means that the delivery time and resource investment are also greatly increased. It has become a new trend in many key fields such as aviation and aerospace to use simulation technology to "rescue" development and testing, and improve the overall software development efficiency.
Tianmu all-digital real-time simulation software SkyEye can realize the simulation modeling of the real target aircraft, and can also solve the problems faced in the development and testing process of the display control and display module of the airborne avionics system.
Full digital simulation · localization scheme of an avionics display and control system
The avionics display and control system consists of two parts, the display control computer and the display computer, which are connected by a high-speed bus to ensure real-time data exchange. By replacing the main control chip with a Feiteng chip and the GPU with a domestic Jingjia microchip, localization can be achieved. Based on SkyEye, an all-digital simulation architecture that fully adapts to the user's original R&D process and testing methods can be built, as shown in the following figure:
After the architecture is built, the relevant test process is shown in the following figure:
The full digital simulation of the avionics display and control system can not only reduce the cost of testing and development by reducing the number of times and risks of physical operations, and greatly shorten the development cycle, but also improve the test coverage and simulation accuracy, and expose problems in advance: engineers are designing and testing Problems can be found and solved at the first stage, the efficiency and quality of research and development are significantly improved, and the reliability of test results is also guaranteed.
SkyEye, which is widely used in the development and testing of aviation, aerospace and other tight industrial fields, has become an indispensable safety environment in the development process of embedded systems such as flap systems, display and control systems, and flight control systems. The digitalization of avionics display and control Simulation has important theoretical significance and practical application value for speeding up aircraft mass production.