Flight control system semi-physical simulation and test verification environment

The flight control system of an aircraft is composed of the automatic flight control system, the main flight control system, and the high lift control system, which directly affects the flight safety and stability. With the development of aviation technology, the requirements for the flight control system are getting higher and higher, and the software system is becoming more and more complex. Due to the particularity of aviation equipment, the system cannot be tested directly on the aircraft, and the traditional iron bird test cannot fully realize effective dynamic testing. This requires the construction of a more convenient and efficient ground test and verification environment that can meet the dynamic test needs of the flight control system and conduct comprehensive semi-physical testing and verification of the flight control system before the flight test.

face the challenge

• The need to simulate the automatic flight control system, primary flight control system, and high lift control system;

• Need to integrate, download and debug the automatic flight control, main flight control and high lift control system software;

• Completed functional and performance testing of the automatic flight control computer, primary flight control computer and high lift control computer;

• It is necessary to realize the joint closed-loop simulation verification of the complete flight control system including the automatic flight control system, the main flight control system and the high lift control system;

• The test and verification environment needs to have better real-time performance, more accurate dynamic models, more efficient testing methods, better scalability and more reliable integration technology;

• The structural relationship of the flight control system semi-physical simulation test verification environment is shown in the figure below.

Flight control system semi-physical simulation test verification environment

solution

• Fully understand the signal interconnection, function, and logical relationship of the automatic flight control subsystem, main flight control subsystem, and high lift control subsystem in the flight control system

• Design peripheral stimulus models and signal simulation to meet debugging and testing requirements

• Custom development of test hardware and functional software

        The test verification environment can provide the following functions:

• By building a complete flight control system and avionics system dynamic model, complete the test stimulus data simulation function and signal injection function together with the real-time simulation system

• Complete test data input, test case editing and test process control functions through automatic test control software

• Complete the fault injection and logic control functions of the physical layer, electrical layer and protocol layer through fault injection control software/hardware

• Complete test data collection, recording, display and analysis functions through data acquisition software

• Complete various display and control panel simulation functions through virtual control software

• Through signal conditioning and adapter units, the system signal connection is flexible, meeting the requirements of independent testing of three subsystems and joint closed-loop testing of the entire system

Schematic diagram of signal cross-linking relationship of automatic flight control system

Advantages of Hirain

• Mature flight control system testing technology and good flight control system theory level

• Complex excitation system modeling and aircraft dynamics modeling technology

• Powerful automated testing technology, supporting the preparation of test cases with complex logic, and completing manual and automated testing

• High real-time data collection and storage technology

• Customized technology for signal conditioning boxes, signal adapter boxes, and disconnection test boxes for complex systems

• Flexible system architecture design technology to ensure the scalability and maintainability of the test system

Implementation Effect

• Through the efforts of Hengrun, the construction of the semi-physical simulation test and verification environment of the flight control system was successfully implemented and completed

• The laboratory is making full use of its powerful ground test capabilities to achieve full-condition dynamic testing of the flight control system

• Optimized the testing methods and improved the testing efficiency and reliability

• Provides strong support for the next iron bird and flight test. Through the efforts of Hengrun, the construction of the semi-physical simulation test and verification environment of the flight control system was successfully implemented and completed.