Design of Corrective Network for Full Envelope Longitudinal Control Loop of a Modified UAV
To ensure that the stability margin of UAV in all control loops of the full envelop meets the requirements of the national military standard,in this paper,the problem that the longitudinal loop stability reserve of a modified UAV is insufficient at some status points is considered.Firstly,accord-ing to the correction characteristics of leading network,lagging network and leading lagging net-work,and in combination with the amplitude phase frequency characteristics of typical status points,the correction scheme based on the leading lagging correction network is selected.Secondly,the sta-bility reserve of longitudinal loops in the full envelop was verified in Maltab/simulink.The results show that the stability reserve of the points with insufficient stability reserve are greatly improved af-ter being added to the designed corrective network.Finally,the stability reserve in each longitudinal control loop is given with the hardware in loop simulation system.The result shows that the stability reserve of each control loop meets the requirements of the national military standard,and the correc-tive network designed is effective.
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维普
