In the last few decades, there has been an increasing interest in the field of nonlinear aeroelasticity. With substantial improvements in computing capabilities, the control surface freeplay problem is now being reinvestigated by many researchers with the goal of developing more advanced and accurate analytical models. Modern theoretical and experimental analyses of freeplay are opening many new avenues of studies within aeroelasticity. While the fundamental problem is believed to be understood and numerous modeling approaches exist, freeplay research continues to yield different numerical predictions of the aeroelastic dynamical behavior and its associated properties. This paper reviews the recent literature on this topic, showing many variabilities in the parameters that define freeplay and its aeroelastic response, with the majority of the existing models being developed deterministically. The research is categorized into the major subtopics that define the freeplay problem, observing that the phenomena has characteristics of nonlinear dynamics.

在过去的几十年中，人们对非线性气动弹性领域越来越感兴趣。随着计算能力的显着提高，许多研究人员现在正在重新研究控制面自由播放问题，目的是开发更先进、更准确的分析模型。自由运动的现代理论和实验分析为气动弹性研究开辟了许多新途径。虽然基本问题被认为已被理解并且存在多种建模方法，但自由运动研究继续产生对气动弹性动力学行为及其相关属性的不同数值预测。本文回顾了有关该主题的最新文献，显示了定义自由游隙及其气动弹性响应的参数的许多可变性，大多数现有模型都是确定性开发的。该研究分为定义自由游戏问题的主要子主题，观察到该现象具有非线性动力学特征。