基于图像视觉作动控制的寿命试验台研制

Development of Life Test Device Based on Image Visual Motion Controlling

摘要:

为实现飞机阻力伞锁寿命试验的自动化检测与控制,针对产品的结构特点和寿命试验要求,设计了电液伺服加载装置模拟开伞载荷,利用特殊设计的作动机构实现锁的自动锁闭,采用基于OTSU全局阈值选取算法的图像分割及特征识别技术,进行产品锁闭状态的非接触式检测,以检测结果为驱动信号,实现了“挂载-锁闭-加载-卸载-开锁”的自动循环控制,多批次试验应用表明,系统工作稳定、可靠,显著提升了长周期寿命试验项目的工作效率和质量控制水平。

Abstract:

In order to realize the automatic test and control of the landing deceleration parachute lock life test for the aircraft,According to the structural characteristics and test requirements,an electro-hydraulic servo loading device is designed to simulate the opening loads of the landing deceleration parachute,The lock is automatically locked by the specially-designed actuator. By applying image visual technology based on OTSU global threshold selection arithmetic,a non-contact detection is carried out for the locking status of the lock,and with the checking result serving as driving signal,an auto circle control of “preloading-locking-loading-offloading-unlocking” is realized. The system is proved to be stable and reliable by batches of testing applications,which significantly improves the operation efficiency and QC level of the long period life test item.