ν-gap度量及其在飞行控制律评估中的应用

ν-gap Metric and Its Application to Clearance of Flight Control Laws

传统控制律评估方法主要用于单输入单输出(SISO)系统,且对模型参数摄动考虑不够全面,针对这些不足,研究了ν-gap度量方法。在介绍系统广义稳定裕度相关概念的基础上,给出了ν-gap度量的定义、特点和性质以及近似摄动模型的计算,提出ν-gap度量评估控制律的步骤。实例结果表明,该方法不仅克服了上述传统评估方法的缺陷,而且还有根据所求的各摄动影响情况忽略影响小的元素,以减少计算量及可以找到最坏情况下的参数摄动组合等优点。

The paper studies the ν-gap metric method by analyzing the shortcomings of the traditional clearance methods. On the basis of introduction of the generalized stability margin and its correlation concepts, the paper presents the definitions, characteristics, properties of the ν-gap metric and computing the approximate perturbation model, and then puts forward the process to clearance of flight control laws （FCLs）. At last, the ν-gap metric is applied to the clearance of a FCL. Results show that the ν-gap metric method not only overcomes the limitations of traditional clearance methods, but also reduces amounts of computation greatly and finds the worst-case parameter combinations.