According to the requirements for tower crane welding robots, precisely planning the welding trajectory is essential. The optimal model for the least-time trajectory planning for the robot is established by Bezier curve, which has the characteristic of sub-section processing. With the consideration of constraints such as joint angular velocity and acceleration, the specific operation steps of g...

Tower cranes are needed to move heavy objects safely around construction sites. In tower cranes, payload oscillations a typical problem that can cause safety issues, especially if the crane is not operated by an experienced user. Depending on system, there different causes for oscillations, e.g., inertial forces from movement or external forces, such as weather conditions. Hence, selected contr...

Abstract—In this paper, we mainly analyze an automated parking system where the storage and retrieval requests are performed by a tower crane. In this parking system, the S/R crane which is located at the middle of the bottom of the cylinder parking area can rotate in both clockwise and counterclockwise and three kinds of movements can be done simultaneously. We develop some mathematical travel...

This paper builds on previous research by the authors which determined the global state-of-the-art of constructing tall buildings by surveying the most active specialist tall building professionals around the globe. That research identified the effect of wind on tower cranes as a highly ranked, common critical issue in tall building construction. The research reported here presents a design for...

Construction equipment production rates are considered an influential factor in construction projects’ success as 30–40% of cost overruns attributed to insufficient rates. The tower crane is one the heavy equipment, and its rate has a huge impact on project’s performance. Current estimations sites not backed by universally accepted applicable methodology. However, vision-based technologies have...