Abstract
A dynamic simulation model of the flap actuation system is developed in this paper to analyze the dynamic interaction behaviours of multiple clearance joints. The nonlinear contact force model and modified Coulomb friction model are adopted in the four clearance joints to capture their motion modes, including free flight mode, impact mode and continuous mode. The results show that there exists a strong dynamic interaction between different clearance joints and one impact motion mode in a joint will immediately affect other joints. And when the system reaches a stable state, the four clearance joints almost appears the similar tendency due to the rigid connection. Therefore, in order to accurately predict the dynamic responses of multibody system, it is essential for all joints to be modelled as imperfect ones.
Highlights
As flap actuation system is widely employed in the field of aircrafts, the demands of predicting the system’s dynamic characteristics accurately are becoming increasingly essential
Li [4] investigated the effects of the number of clearance joints on the dynamic characteristics of planar deployable structure based on scissor-like element, and the results indicated that the motion in one revolute clearance joint will affect the motion in the other clearance joint
In order to achieve the relationship between system responses and combination motion modes as well as dynamic interaction of clearance joints, the dynamic characteristics of flap actuation system with multiple clearance joints are investigated in this paper, which is significant for the dynamic simulation and analysis of transmission system in aerospace field
Summary
As flap actuation system is widely employed in the field of aircrafts, the demands of predicting the system’s dynamic characteristics accurately are becoming increasingly essential. The actuator receives the control command of flight attitude of aircrafts, and produces force to drive linkage mechanism connected with control surface. Muvengei [5] and Ma [6] studied the interaction and combination motion modes between clearance joints, but the slider-crank mechanism only including four simple parts is always studied and there has been less investigated on the combination motion modes and inner rules of aircrafts with imperfect revolute joints. In order to achieve the relationship between system responses and combination motion modes as well as dynamic interaction of clearance joints, the dynamic characteristics of flap actuation system with multiple clearance joints are investigated in this paper, which is significant for the dynamic simulation and analysis of transmission system in aerospace field
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