公开(公告)号：US20200377158A1

公开(公告)日：2020-12-03

申请号：US16424073

申请日：2019-05-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Andrew Thomas Cunningham ,  James C. O'Kane ,  Robert G. Izak

IPC: B62D35/00

Abstract: Presented are flutter countermeasure devices and control logic for active aerodynamic systems, methods for making/using such active aero systems, and vehicles equipped with spoiler flutter countermeasure devices for increasing downforce and decreasing drag. A method of operating an active aerodynamic system of a motor vehicle includes detecting, via a system controller based on sensor data received from one or more sensing devices, a flutter excitation experienced by a spoiler of the active aero system during operation of the motor vehicle. The controller determines a harmonic oscillation amplitude of the flutter excitation experienced by the spoiler, and then determines if this harmonic oscillation amplitude exceeds a vehicle-calibrated threshold amplitude. If so, the system controller determines a damping force sufficient to mitigate or eliminate the harmonic oscillation amplitude. The controller then commands a flutter countermeasure device operatively attached to the spoiler to generate the damping force and thereby mitigate the flutter excitation.