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首页> 外文期刊>The Aeronautical Journal >Fidelity enhancement of a rotorcraft simulation model through system identification
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Fidelity enhancement of a rotorcraft simulation model through system identification

机译：通过系统识别增强旋翼飞机仿真模型的保真度

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摘要

High fidelity modelling and simulation are prerequisites for ensuring confidence in decision making during aircraft design and development, including performance and handling qualities, control law developments, aircraft dynamic loads analysis, and the creation of a realistic simulation environment. The techniques of system identification provide a systematic framework for 'enhancing' a physics-based simulation model derived from first principles and aircraft design data. In this paper we adopt a frequency domain approach for model enhancement and fidelity improvement of a baseline FLIGHTLAB Bell 412 helicopter model developed at the University of Liverpool. Predictability tests are based on responses to multi-step control inputs. The techniques have been used to generate one, three, and six degree-of-freedom linear models, and their derivatives and predictability are compared to evaluate and augment the fidelity of the FLIGHTLAB model. The enhancement process thus involves augmenting the simulation model based on the identified parameters. The results are reported within the context of the rotorcraft simulation fidelity project, Lifting Standards, involving collaboration with the Flight Research Laboratory (NRC, Ottawa), supported with flight testing on the ASRA research helicopter.
机译：高保真建模和仿真是确保对飞机设计和开发过程中的决策有信心的先决条件，包括性能和处理质量，控制律发展，飞机动态载荷分析以及创建逼真的仿真环境。系统识别技术为“增强”基于第一原理和飞机设计数据的基于物理的仿真模型提供了系统的框架。在本文中，我们采用频域方法对利物浦大学开发的基线FLIGHTLAB Bell 412直升机模型进行模型增强和保真度改进。可预测性测试基于对多步控制输入的响应。该技术已用于生成一，三和六自由度线性模型，并将它们的导数和可预测性进行比较，以评估和增强FLIGHTLAB模型的保真度。因此，增强过程包括基于所识别的参数来增强仿真模型。结果是在旋翼飞机模拟保真度项目“提升标准”的范围内报告的，该项目涉及与飞行研究实验室（渥太华NRC）的合作，并在ASRA研究型直升机上进行了飞行测试。

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