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Coordination control strategy based on characteristic model for 3-bearing swivel duct nozzles 被引量:3

Coordination control strategy based on characteristic model for 3-bearing swivel duct nozzles
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摘要 A coordination control strategy is developed for 3-bearing swivel duct (3BSD) nozzles. A 3BSD nozzle's deflection angle and direction are changed through rotations of three revolute pairs. There is a nonlinear relationship between the deflection an- gle/direction and the rotation angles. The rotation speed of a revolute pair is limited by the power of the actuator. The moment of inertia and the aerodynamic load for each revolute pair are different and time-varying. A high-precision control system of 3BSD nozzles is required for applications on vertical and/or short take-off and landing (V/STOL) aircrafts. Difficulties of co- ordination control of 3BSD nozzles are distinct travel ranges, speed constraints, time^xarying dynamic models, and disturb- ances. The proposed control strategy is a combination of the characteristic model and tlF e dynamic control allocation method. A dynamic control allocation module is used as the coordination supervisor, which is aware of the kinematic model, the con- straints, and the dynamic models of the revolute pairs. Second-order characteristic models are used to represent the dynamic behavior of the revolute pairs. The gradient projection algorithm is modified for parameter estimation. A modified all-coefficient adaptive controller is developed to reject the disturbances. Experimental results of a scaled 3BSD nozzle indi- cate that the coordination control strategy is effective.
出处 《Science China(Technological Sciences)》 SCIE EI CAS 2014年第12期2347-2356,共10页 中国科学(技术科学英文版)
基金 supported by the National Natural Science Foundation of China(Grant Nos.60974339,61104082)
关键词 3-bearing swivel duct nozzle thrust vector coordination control characteristic model adaptive control dynamic con-trol allocation 协调控制策略 特征模型 旋转管 喷嘴 轴承 导管 空气动力载荷 梯度投影算法
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