Abstract: Aiming at the stability problem during the unfolding process of the articulating boom lifting vehicle, dynamic models of the vehicle were made by software ADAMS, and the full-stroke action from the folded state to the extreme extension state was simulated. The centroid trajectory solving program was imported to obtain the lateral offset curves of the centroid of the whole machine under different expansion modes and operation sequences. Combined with the gravity method, the stability of the boom structure under the sequential expansion and synchronous expansion was analyzed. The influence of different operation sequences on the stability of the unfolding process was considered by comparing the lateral offset of the centroid. The results indicate that the lifting vehicle has good stability, and the sequential expansion from bottom to up, first-unfolding to post-extension can further improve the stability during the unfolding process. The above method can be applied to the analysis of the stability of other articulating boom lifting vehicles.
Key words: articulating boom lifting vehicle; unfolding stability; expansion modes; centroid trajectory; ADAMS