A multiple effector control allocation method based on attainable moment subset

When control allocation method based mathematical programming is used to solve the multi-objective allocation problem, it is needed to establish the allocation objectives of the various phases of flight of the aircraft, and then to use linear programming or quadratic programming method for solving. Although the method can get an optimal solution, it neglects the physical differences among the surfaces and dispatches all the control surfaces at the same time, which is not beneficial to the algorithm's engineering applications and to system reliability. Especially the algorithm requires automatic mode switch which greatly increases the complexity of control system design. In order to solve the problem, an allocation method based on attainable moment subset is proposed. The method first calculates the attainable moment subset (AMS) of different effector groups and then chooses a group as the master control surfaces according to its AMS structure characteristic together with its radar reflectivity characteristics and resistance characteristics. So Conventional layout aircraft control law design methods and experience can still be used. When the master control surfaces can not meet the demand for the available torque, auxiliary control surfaces and thrust vector control surfaces will be dispatched; and the management of the auxiliary control surfaces is in accordance with the priority of the radar reflectivity. The simulation results and their analysis show preliminarily that: (1) the proposed method avoids the faults of the allocation methods based on mathematical programming; (2) the way of managing the auxiliary control surfaces and thrust vector control surfaces by available three-axis torques is feasible and a reasonable control allocation design is achieved.