ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Nonlinear optimal feedforward compensation controller for heavy load aviation load simulator
Received date: 2015-06-11
Revised date: 2015-10-13
Online published: 2015-10-15
Supported by
National Natural Science Foundation of China(51275450,51521064);National Basic Research Program of China(2014CB046403)
Heavy load aviation load simulator is the ground simulation platform, which is used to simulate the real work load of the heavy-duty aircrafts such as C919 and Yun-20. A heavy-duty aviation load simulator is developed to achieve large load in limited space and the asymmetric cylinder is used as the actuator. In order to eliminate the influence of surplus force on the loading precision of the overloaded simulator, the influence of the bidirectional motions of the cylinder and the nonlinear flow gain coefficient of the servo valve for the feedforward compensation function are analyzed, and the nonlinear parameter estimation controller has been proposed. Meanwhile, the influence of dynamic parameters' variation(such as acceleration) and static parameter error for eliminating the excessive force is analyzed, and the parameter optimal controller is developed. Both simulation and test results show that the performance of the developed feedforward compensation controller has been improved by more than 50% in the loading precision and the eliminating ability of the surplus force, compared to the traditional feedforward compensation controllers.
Key words： heavy load; load simulator; surplus force; nonlinear control; feedforward control
OUYANG Xiaoping , LI Feng , ZHU Ying , YANG Shangbao , YANG Huayong . Nonlinear optimal feedforward compensation controller for heavy load aviation load simulator[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016 , 37(2) : 669 -679 . DOI: 10.7527/S1000-6893.2015.0277
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