Hardware in the loop simulation and test verification environment of flight control system

As the key function system of aircraft, the performance of flight control system directly affects the quality of aircraft control and the performance of aircraft. It is an important link related to the flight safety of aircraft. Comprehensive test and verification of flight control system is a means and ruler to ensure that users can obtain and maintain operational performance and operational applicability. Full verification of the function and performance of flight control system on the ground can greatly shorten the flight test cycle, reduce the cost of flight test and accelerate the development progress of aircraft.

Flight control system is composed of computer, software, steering gear and sensors. It is necessary to build various simulation systems, test systems, excitation systems and flight simulation systems to achieve the goal of comprehensive verification. In view of the complex configuration of flight control system test environment, diverse test items and high test accuracy requirements, this paper studies the characteristics of flight control system test environment. A comprehensive test and verification platform with advanced technology, perfect function and integration is developed.

Challenges

* Increased complexity of flight control system requires advanced verification environment and diversity of verification means.

* How does the test verification environment cover the system test outline to meet user needs

* Simulation Modeling Requires the Establishment of High Fidelity Simulation Model

* The time characteristic of simulation requires strong real-time and high certainty

* The test system is scalable, easy to extend and inherit.

* Rapid research and development to ensure the whole life cycle of flight control system

* Quality evaluation, data analysis based on the experimental results to determine whether the test results meet the requirements of the system

Solution

* Based on the idea of system engineering, validating flight control system runs through a series of processes, such as user requirements, test function requirements, test system design and comprehensive validation, and designs a framework of rapid intelligent validation based on model transfer.

* Using tools to build simulation model and establish high fidelity model

* Using RTX, QNX, LINNUX and other real-time operating systems to achieve high real-time operation of simulation model

* The resource-oriented testing architecture realizes the decoupling of top-level business and bottom-level resources, and achieves the scalability and tailorability of the testing system through hardware and software adaptation technology.

* Advanced experimental framework, mature experience and high-level R&D team implement rapid R&D, product life cycle continuous renewal and support capability

Test Verification Environment Function

* By building a complete dynamic model of flight control system and Avionics system, the functions of test excitation data simulation and signal injection are accomplished together with real-time simulation system.

* Through automatic test control software, test data input, test case editing and test process control functions are completed.

* Through fault injection control software/hardware, the functions of fault injection and logic control in physical layer, electrical layer and protocol layer are completed.

* Through data acquisition software, test data acquisition, recording, display and analysis functions are completed.

* Through the virtual control software, the simulation functions of various display and control panels are completed.

* Through signal conditioning and adapting unit, the system signal connection is flexible, which can meet the independent test of three subsystems and the combined closed-loop test of the whole system.