一种四旋翼自主飞行器的设计与实现

通过对四旋翼飞行器进行设计,使其能够在人工控制时实现一键式启动,从而在指定的区域内完成自主飞行任务。研究方法是基于瑞萨器件R5F100LEA作为核心控制器件,辅助以采用超声波测距传感器HC-SR04和九轴运动处理传感器MPU-6050来控制飞行器的运动方式和运动姿态。     

Lifetime prediction of electrical connectors under multiple environment stresses of temperature and particulate contamination

Electrical connectors play a significant role in the electronic and communication systems. As they are often exposed in the atmosphere environment, it is extremely easy for them to cause electrical contact failure. It is essential to carry out the reliability modeling and predict the lifetime. In the present work, the accelerated lifetime testing method which is on account of the uniform design method was designed to obtain the degradation data under multiple environmental stresses of temperature and particulate contamination for electrical connectors. Based on the degradation data, the pseudo life can be acquired. Then the reliability model was established by analyzing the pseudo life. Accordingly, the reliability function and reliable lifetime function were set up, and the reliable lifetime of the connectors under the multiple environment stresses of temperature and particulate contamination could be predicted for electrical connectors.