基于自抗擾控制的小型無人直升機(jī)高度控制的研究與應(yīng)用
[Abstract]:Small unmanned helicopter has a wide application prospect in both military and civilian fields, which is regarded as a very important research subject by national defense research institutions and some private enterprises. My laboratory has been engaged in this field for a long time and has made some achievements. In this paper, based on the results of the laboratory, further exploration and research are carried out. The emphasis of this paper is to design the vertical channel controller of small unmanned helicopter by using the method of ADRC. The main contents are as follows: the stability of ADRC and the influence of parameters on the system are discussed, and a set of simple parameter tuning scheme is designed, and the ADRC is applied to the vertical channel nonlinear model of small unmanned helicopter. The model information assistant mode is designed and its performance in various environments is verified by simulation, and the active disturbance rejection control is applied to the actual unmanned helicopter by experiment. The innovation of this paper lies in 1: 1. It summarizes all kinds of effects caused by the variation of ADRC parameters, and puts forward a simple way of parameter tuning. The second order ADRC transfer function based on the vertical channel linear model is derived. Based on the transfer function, the effects of parameter changes on the closed-loop characteristics, disturbance suppression ability and noise amplification characteristics of the system are discussed. On the basis of these discussions, a set of simple parameter tuning scheme. 2, which applies ADRC to the vertical passage of small unmanned helicopter, is discussed. A model information aided method is proposed to improve the performance of ADRC. The model information auxiliary mode makes use of the disturbance information which is simple and easy to measure, and the form of the extended state observer and the dynamic compensation method are modified, which makes better use of the compensation ability of the ADRC to the unknown disturbance. On the basis of maintaining the active disturbance rejection parameters, the performance of the system is improved. A number of methods are designed to solve some problems encountered in practical application: the first-order least square method is used to roughly estimate the steady-state gain parameter b of the system, and a control switching method is designed. In order to solve the problem that the total distance output ability is decreased due to the decrease of battery power, the problem of limiting the amplitude of ADRC is solved by designing the combination of small coefficient integrator and active disturbance rejection control.
【學(xué)位授予單位】:華南理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:V275.1;V249.1
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