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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2014, Vol. 35 ›› Issue (4): 1122-1133.doi: 10.7527/S1000-6893.2013.0505

• Electronics and Control • Previous Articles     Next Articles

Direct Disjunction Transcription Based Conflict Resolution Approach

CHEN Weifeng1, SHAO Zhijiang2   

  1. 1. College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China;
    2. Institute of Industrial Control, State Key Laboratory of Industrial Control Technology, Zhejiang University, Hangzhou 310027, China
  • Received:2013-08-20 Revised:2013-12-25 Online:2014-04-25 Published:2014-01-07
  • Supported by:

    National Natural Science Foundation of China (61203132)

Abstract:

For the conflict resolution under free flight conditions, a direct disjunction transcription based simultaneous approach (DDTSA) is put forward in this paper. First, the disjunction based safety boundary conditions are transformed directly into continuous constraints without introducing any additional auxiliary variables, which can be handled simultaneously with ease. The number of variables and the number of equations can be decreased remarkably and then the solution difficulty is reduced. In order to guarantee the solution precision and the solving stability, Radau collocation points based Lagrangian interpolation polynomial is utilized to discretize the group of differential algebraic equations, and then the generated nonlinear programming program is solved to obtain the optimal control profiles. Finally, two aircrafts, three aircrafts and four aircrafts conflict resolution problems are demonstrated. The simulation results show that the proposed method is able to solve these conflict resolution problems with higher efficiency than the approach presented in the related reference; furthermore, it can also yield a better objective value.

Key words: free flight, conflict resolution, disjunction, optimal control, simultaneous approach

CLC Number: