神经网络在无人驾驶车辆运动控制中的应用综述

Overview of the application of neural networks in the motion control of unmanned vehicles

  • 摘要: 无人驾驶车辆自身具有强烈的非线性、信号时延和参数不确定性,对它的控制还受到道路附着系数的变化、侧向风等外界因素影响。因此传统控制方法往往难以对其稳定和精确地控制。神经网络所具有的学习能力、自适应能力和近似非线性映射的能力,为解决车辆模型参数的不确定性、外界的扰动以及车辆自适应控制问题提供了有效的途径。针对上述几个方面,对近几年国内外学者将神经网络应用到无人驾驶车辆运动控制中所取得的成果与进展进行了归纳分类,分别介绍了应用情况并对优缺点进行评价。最后总结了神经网络在无人驾驶车辆运动控制中存在的主要问题,并展望了可能的发展方向。

     

    Abstract: This paper aims to introduce the application of neural networks in the motion control of unmanned vehicles in recent years. With the breakthrough of computer, robot control, and sensing technology, the development of unmanned vehicles has entered a stage of rapid development. It can reduce driver mistakes, bring convenience to the daily travel of humans, and it is widely used in the military and dangerous fields. However, the unmanned vehicle itself has strong nonlinearity, signal delay, and parameter uncertainty and its control is affected by external factors such as the change of road adhesion coefficient and lateral wind. Therefore, traditional control methods often face challenges in controlling the vehicle stably and accurately. The learning, adaptive, and approximate nonlinear mapping abilities of neural networks provide an effective way to solve the problems of vehicle model parameter uncertainty change, external disturbance, and vehicle adaptive control. Therefore, it is increasingly applied to the motion control of unmanned vehicles. The self-learning and adaptive ability of neural networks enable them to calculate the direct output control quantity according to the state deviation of the vehicle, which can be used as the controller of the unmanned vehicle. The ability of the neural networks to approach a nonlinear mapping makes it possible to approach the unknown dynamic parts of the vehicle, such as the uncertain parameters and external disturbances, which improves the accuracy and robustness of the controller design. The neural networks can remember previous information that can be used to calculate the current output. Thus, the neural networks can be used as the vehicle state observer to estimate the vehicle state parameters. The adaptive ability of the neural networks enables them to optimize the parameters of other control algorithms online. From these aspects, this paper summarized and classified the achievements and progress made by domestic and foreign scholars in applying neural networks to the motion control of unmanned vehicles in recent years, introduced the application situation, and evaluated the advantages and disadvantages. Finally, the main problems of neural networks in the motion control of unmanned vehicles were summarized and the possible development direction was prospected.

     

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