Partial-jet-borne flight LQG/LTR robust controller design
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摘要: 研究线性高斯二次型回路传输恢复(LQG/LTR)鲁棒设计方法在动力增升阶段飞行/推进综合控制器设计中的应用问题,以带宽和Gibson准则作为基本的飞行品质指标,以奇异值作为鲁棒性指标,深入分析了基于LQG/LTR鲁棒控制的参数选择规律,包括姿态和速率指令的分配、前置滤波器的影响、扰动水平的预设、高频环节对系统鲁棒性和飞行品质的影响等问题.示例飞机构形的控制器设计结果表明:在LQG/LTR鲁棒飞行控制器设计过程中,适当选取响应类型参数和扰动水平因子,可以折衷飞机的飞行品质和鲁棒性能.
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关键词:
- 飞行品质 /
- 鲁棒性 /
- 动力增升 /
- 线性高斯二次型回路传输恢复
Abstract: A research was done for the problem of the application of integrated flight/propulsion system of the aircraft using LQG/LTR(linear quadratic gaussian/loop transfer recovery) robust design methodology at the partial-jet-borne flight phase. With flying qualities assessed by bandwidth and Gibson criteria, and the robustness assessed by singularity values, the rule of choosing LQG/LTR design parameters was analyzed, including several influential factors, such as allocation of the attitude and rate command, effects of prefilters, presetting of disturbance level factor and effects of high frequency dynamics on the robustness and flying qualities. The controller design on a test aircraft configuration shows that compromise can be made between flying qualities and robustness by designing LQG/LTR robust controller, if the response type parameter and the disturbance level factor are suitably chosen.-
Key words:
- flying qualities /
- robustness /
- partial-jet-borne /
- LQG/LTR
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