Fidelity enhancement of a rotorcraft simulation model through system identification
Fidelity enhancement of a rotorcraft simulation model through system identification
复制标题
通过系统辨识增强旋翼机仿真模型的保真度
DOI：
10.1017/s0001924000006102
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
P. Perfect
中科院分区：
文献类型：
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作者：
L. Lu;G. Padfield;M. White;P. Perfect
在飞机设计和研制过程中，包括性能和操纵品质、控制律的研制、飞机动载荷分析和逼真的仿真环境的建立，高保真度的建模和仿真是保证决策可信度的先决条件。系统识别技术提供了一个系统的框架，用于“增强”从第一性原理和飞机设计数据导出的基于物理的仿真模型。在本文中，我们采用了频域的方法模型增强和保真度的改善基线FLIGHTLAB贝尔412直升机模型在利物浦大学开发。可预测性测试基于对多步控制输入的响应。该技术已被用来生成一个，三个和六个自由度的线性模型，其衍生物和可预测性进行比较，以评估和增强的保真度的FLIGHTLAB模型。因此，增强过程涉及基于所识别的参数来增强仿真模型。这些结果是在旋翼机模拟逼真度项目“升力标准”的范围内报告的，该项目涉及与飞行研究实验室（NRC，渥太华）的合作，并得到ASRA研究直升机飞行试验的支持。
Abstract 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.