"On a tight schedule, we developed a pilot-in-the-loop simulation lab in which we can easily evaluate various control systems and rapidly adjust the feedforward path of the control laws if needed. Without MathWorks tools we would not have met our deadline."
Nomaan Saeed，湾流航空航天
使用飞行测试来评估飞行控制架构，评估数字控制法实施和开发高级飞行显示既昂贵又耗时。湾流航空航天的工程师通过使用Mathworks工具来开发飞行员飞机模拟实验室来解决这些问题。该实验室包括一个带有飞行员接口，飞行控制显示器和窗户视图的驾驶舱仿真器。控件和显示器与基于空气动力学和发动机力量的高保真模型模型，运动方程，飞机传感器，控制表面驱动以及飞行控制定律有关。金宝app
湾流的飞行科学金宝app工程师Nomaan Saeed说：“使用Simulink和Aerospace模块，我们开发了一个模块化和可重新配置的模拟环境。”“数学工具使我们能够快速评估控制法律，修改我们的控制系统，并立即看到这些变化对模拟过程中处理质量的影响。”
湾流工程师需要建造灵活的飞行员飞机模拟设施，包括飞机的六度模拟模拟，以准备对修改后的湾流G550进行预定的飞行测试。
To accelerate development and meet their tight deadline, the team planned to divide the project into multiple parts and work on all parts simultaneously. The flight control system development team required a highly interactive modeling and simulation environment to rapidly test and evaluate control laws. The team developing the aircraft dynamics simulation needed to further divide the model into smaller high-fidelity subsystems—including the flap control unit, flight dynamics modeling, air data sensors and systems, inertial reference units, and angle-of-attack sensors—which would be developed concurrently and then integrated into a complete aircraft simulation.
Gulfstream工程师使用Simulink，Ae金宝approspace Blabsset™和Simulink Coder™来开发模拟器并在模拟飞行过程中实时评估控制法律设计。
They developed the aircraft dynamics model by translating existing equations for the aircraft into Simulink. Originally developed in Fortran, these equations were based on a traditional flat-earth model. The team used Aerospace Blockset to upgrade this model with round-earth equations of motion that incorporate the shape of the earth, its rotation, and the variation of gravity.
For the equations of motion and the wind and turbulence model, the engineers adapted predefined blocks in Aerospace Blockset.
The team also used Aerospace Blockset to perform coordinate transformation, converting欧拉角to directional cosine matrices. With Control System Toolbox™ they calculated eigenvalues, natural frequencies, and damping factors. Model referencing in Simulink enabled multiple teams to develop individual components independently and organize them hierarchically into a complete system.
After validating the aircraft dynamics model against flight test data, the team used Simulink Coder to automatically generate C code, which they compiled to create a real-time simulation of the aircraft. A separate Gulfstream team developed the flight-control system model in Simulink. The two models, which communicated via shared memory, were then simulated together.
The simulation ran in interpreted mode, enabling Gulfstream engineers to analyze and debug the model as it ran by placing scopes on signals, introducing faults, and evaluating new algorithms.
Using a standard block from Aerospace Blockset, they connected the Simulink model to FlightGear flight simulation software to display window views based on aircraft state data.
团队使用MATLAB®为了后进程模拟结果并创建用于更改飞行条件，选择机场并在模拟过程中诱导故障模式的用户界面。
Gulfstream continues to employ the simulation lab for a variety of aircraft. "Because of the flexibility of Simulink, we can use the lab for a wide range of purposes," says Saeed. "It is highly modular and reconfigurable, so we can easily shift between different aircraft models, or evaluate different components."
成功的第一航班。后fligh实现控制律t-control computer, the team flew the aircraft. "We had a deadline to meet and we met that deadline," Saeed says. "When we flew the aircraft, everything went according to schedule."
Accelerated development。赛义德指出：“没有数学工具工具，我们就不会满足我们的截止日期。”“通过使用相同的工具来开发飞机动力学模型和循环仿真，我们可以快速开发和评估控制系统。”
现实的飞行测试准备环境。Gulfstream used the simulation laboratory to prepare test pilots for flight testing. The pilots reported that the simulator closely matched the flight characteristics of the actual aircraft and provided an outstanding environment to prepare for flight tests.
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