An accurate surface model for an aircraft and its components was constructed by using B-spline theory. The model can be discretilized into triangle surface elements, relationships among geometrical elements were represented with the improved winged-edge structure. Based on inclusion-exclusion principle of set theory,a new algorithm to calculate the whole projective area was put forward to those overlapped complex geometrical objects in any direction. The algorithm has been used successfully in fighter aircraft vulnerability analysis. Applications showed that the algorithm is stable,reliable and accurate.
XU Yuan-ming, LONG Wei, WANG Yong.A New Algorithm of Multi-Shadowed Projective Area and Its Application in Fighter Aircraft Vulnerability Analysis[J] JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2002,V28(2): 245-248