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首页> 外文期刊>Journal of Aerospace Sciences and Technologies >ACCELERATED FLIGHT ENVELOPE EXPANSION USING NEAR REAL TIME STABILITY MARGIN ESTIMATION
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ACCELERATED FLIGHT ENVELOPE EXPANSION USING NEAR REAL TIME STABILITY MARGIN ESTIMATION

机译：使用近实时稳定度边际估计来加速飞行包络

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摘要

A novel technique for estimating the stability margins in near real time has been developed by the authors. This paper shares the invaluable flight test experience gained in using it for flight envelope expansion of India's first digital fly-by-wire Light Combat Aircraft (LCA). Use of this technique has resulted in reducing the overall flight test effort and cost without compromising safety. Using the technique, it was possible to estimate the stability margins on a desktop computer using real time telemetry data within approximately 60 seconds of completing the test. The flight test results for 'Fixed' (restricted flight envelope) and 'Scheduled' (full flight envelope) gain control laws, for manually generated pilot 3-2-1-1 inputs and pre-programmed 3-2-1-1 inputs generated using the onboard Flight Test Panel (FTP) are presented. During the LCA flights, the stability margins were found to be satisfactory throughout the flight envelope. In order to establish that the same technique would work equally well when the stability margins are marginal, typical results were also generated using simulation data and are included in this paper. By artificially increasing the plant gain I delay in the simulation model it is shown that even if the stability margins are low, the same technique correctly estimates the relative stability.
机译：作者已经开发出一种新的技术，可以近乎实时地估算稳定裕度。本文分享了将其用于印度首架数字化电传轻型战斗飞机（LCA）的飞行包线扩展所获得的宝贵飞行测试经验。使用该技术可降低总体飞行测试的工作量和成本，而不会影响安全性。使用该技术，可以在完成测试后大约60秒钟内使用实时遥测数据来估计台式计算机的稳定性裕度。对于手动生成的飞行员3-2-1-1输入和预编程的3-2-1-1输入，“固定”（受限飞行包线）和“计划”（完整飞行包线）增益控制定律的飞行测试结果显示了使用机载飞行测试面板（FTP）生成的信息。在LCA飞行期间，发现整个飞行包线的稳定裕度都令人满意。为了确定相同的技术在稳定裕度为边际时也能同样有效地工作，还使用模拟数据生成了典型结果，并将其包括在本文中。通过人为地增加仿真模型中的工厂增益I延迟，可以表明即使稳定性裕度很低，相同的技术也可以正确估计相对稳定性。

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