Control System Design of Threshing Separator Based on ARM

In order to realize the safe operation of the amphibious multifunctional threshing separator, designing the control system based on the ARM embedded processor, the system through the CAN industrial field bus, connected with the temperature sensor, the infrared sensor, the stroke sensor, the revolution speed sensor, control the automatic clutch and the brake system through the electric relay. When the equipment overheating, personnel illegal operation, speed anomalies, equipment location errors, etc., the system can be timely control of the device brake and shut-down, to avoid serious safety accidents

A modified airfoil-based piezoaeroelastic energy harvester with double plunge degrees of freedom

In this letter, a piezoaeroelastic energy harvester based on an airfoil with double plunge degrees of freedom is proposed to additionally take advantage of the vibrational energy of the airfoil pitch motion. An analytical model of the proposed energy harvesting system is built and compared with an equivalent model using the well-explored pitch-plunge configuration. The dynamic response and average power output of the harvester are numerically studied as the flow velocity exceeds the cut-in speed (flutter speed). It is found that the harvester with double-plunge configuration generates 4%–10% more power with varying flow velocities while reducing 6% of the cut-in speed than its counterpart