Anti-Dropping Technology of Four-Wheeled Throwing Robot

Within the fields of reconnaissance and surveillance, there is an ongoing need to obtain information from areas that are hard to reach or unsafe to enter. Thus, using robots with high performance in detecting obstacles is advantageous in these situations. The anti-drop impact design is one of the challenges facing the design of the throwing robots. In this present study, the drop model of the four-wheeled mobile robot is established, while the response of the model under shock impact is analyzed. Using the response of the model, we can obtain relationships between the maximum compression displacements of the wheels and the maximum acceleration of the robot, the drop height of the robot, the natural frequency of the impact response. Using the relationship between the maximum stress, the maximum deformation of the shell and the thickness of the shell, we can obtain the maximum acceleration of the robot. According to the relationships between the parameters, the optimal design parameters for the anti-dropping capability of the robot are chosen. A finite element model was established with Abaqus and a free fall from a height of 6 m to the solid ground was tested. The results show that the optimized structure can survive from the impact with solid ground from a free fall at a height of 6 m.