气动力减速器(aerodynamic decelerator)，泛指可折叠或收拢，工作时能展开增大迎风面积产生气动力作用，使与其相连的物体减速或稳定的装置，最常见的是降落伞。应用学科于航空科技（一级学科）；航空安全、生命保障系统与航空医学（二级学科）等学科。
翼伞作为一种新型气动力减速器日渐受到空间回收技术重视。
The gliding parachute systems as a kind of new aerodynamic decelerators, has been attached importance to space recovery technology increasingly.
由于减速器内的运动部件(旋转盘、控制杆)改进了空气动力学，结果使效率增加。
Improved aerodynamics due to the transfer of moving parts (swash plate, control rods) into the transmission results in an increase in efficiency.
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