The variational problem of the movement mode selection for load outreach change mechanism during a steady-state tower crane slewing was formulated and solved in paper, that ensures minimization drive motor power. is nonlinear, so we used modified PSO-Rot-Ring particle swarm met heuristic method its solution. Low- high-frequency oscillations elements start-up were detected optimization process. ...

The use of cranes to complete the tower assembly in plain and hilly areas has been widely used construction assembly. But its safety hazards are obvious. Tower erection by using crane based on docking device is an advanced technology field power grid at home abroad. It advantages high efficiency good safety. This certain requirements technology, supporting auxiliary devices, operator skills. In...