Analysis of Control Surface Assignment Strategy and Flight ConversionPath for Redundant Manipulation of Tilt-rotorcraft

Abstract

The redundant manipulations on different control surfaces of tilt-rotorcraft are of great importance for its control reconfiguration. The nonlinear model trim and small perturbation linearization processing result are presented based on the small unmanned tilt-rotorcraft flight dynamics model. The pitch, roll and yaw moment changing results are obtained, and manipulation efficiency is analyzed in detail under independent control of the different control surface, which confirmed that redundant control surface of tilt-rotorcraft is of the reconfiguring capacity. Manipulation styles under different flight mode are determined, and weight coefficient matrix of allocation strategy of control surface is obtained. Based on the results of analysis, the three different full mode flight conversion paths are presented, and the relations among the flight speed and turn forward angle, attitude angle, manipulation quantity are calculated. The results show that manipulation efficiency can be achieved through the three conversion paths, and indicate that redundant control surface reconfiguring ability of tilt-rotorcraft can be realized.

Keywords

• tilt-rotorcraft
• redundant manipulation
• control surface assignment
• flight conversion path