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arXiv 2201.09805eess.SYcs.SY
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非线性动态逆与执行器动态:增量控制的观点

Non-Linear Dynamic Inversion with Actuator Dynamics: an Incremental Control Perspective

Rasmus Steffensen, Agnes Steinert, Ewoud Jan Jacob Smeur

摘要:

本文针对一阶线性执行器的非线性系统,推导了一种基于传感器的非线性动态逆(NDI)控制律,并与近年来流行的增量式非线性动态逆(INDI)进行了比较。结果表明,对于一阶执行器动态,INDI逼近相应的NDI控制律任意以及足够快的执行器的条件下。如果致动器带宽与状态变化相比较低,则导出的NDI控制律与INDI相比具有以下优点:1)补偿状态导数项; 2)良好定义的误差动态;以及3)精确跟踪参考模型,与标称条件下的误差控制器增益无关。INDI控制律与成熟的控制设计方法NDI的比较增加了对增量控制的理解。它还示出了如何量化的INDI控制法的不足之处,相对于精确的NDI法的致动器与有限的带宽。通过对某固定翼飞机滚转运动的仿真结果验证了上述结论。

英文摘要:

In this paper, we derive a sensor based Nonlinear Dynamic Inversion (NDI) control law for a nonlinear system with first-order linear actuators, and compare it to Incremental Nonlinear Dynamic Inversion (INDI), which has gained popularity in recent years. It is shown that for first-order actuator dynamics, INDI approximates the corresponding NDI control law arbitrarily well under the condition of sufficiently fast actuators. If the actuator bandwidth is low compared to changes in the states, the derived NDI control law has the following advantages compared to INDI: 1) compensation of state derivative terms 2) well defined error dynamics and 3) exact tracking of a reference model, independent of error controller gains in nominal conditions. The comparison of the INDI control law with the well established control design method NDI adds to the understanding of incremental control. It is additionally shown how to quantify the deficiency of the INDI control law with respect to the exact NDI law for actuators with finite bandwidth. The results are confirmed through simulation results of the rolling motion of a fixed wing aircraft.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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