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Application of the mathematical autodriver algorithm for autonomous vehicles

机译:数学自动驾驶算法在自动驾驶汽车中的应用

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摘要

The mathematical theory for autonomous vehicles, which was initially developed for 4 Wheel steering vehicles was formulated to work for 2 wheel steering vehicles as well. This was the first step towards making the theory closer to practice. Then a sample road using clothoids as the transition curve was generated. Clothoid was used as the best transition curve according to the literature for mobile robots trajectory generation. This study ended up in development of a design chart which could be used for better road design. The sample road is used to find the kinematic steering angles required by the vehicle to stay on the road. The kinematic steering angles work well only at very low forward velocities. The dynamic differential equations of motion of the vehicle needed to be solved to make the study of motion of the vehicle possible in higher velocities. During high forward velocity travelling some factors will cause the vehicle to move on a road different to the desired path of motion. The sample road generated proved that the traditional method of solving differential equations of motion was not very effective especially in the case of complicated mathematical paths of motion. That is why a new method was sought for, which resulted in the generation of the Steady-State Dynamic Steering method. This method provides an alternative way of studying the dynamics of motion of a vehicle, which is proved to be much faster and less complicated than the traditional method. At the end the new method was, put in to test by trying different vehicle travelling manoeuvres. After validation of the new method it was used mathematically to take control of a car to travel a sample desired path of motion autonomously by using the mathematical theory of autonomous vehicles.
机译:最初为四轮转向汽车开发的自动驾驶汽车数学理论也被公式化为也适用于两轮转向汽车。这是使理论更接近实践的第一步。然后生成使用回旋曲线作为过渡曲线的样本道路。根据文献资料,将类固醇作为最佳过渡曲线用于移动机器人的轨迹生成。这项研究最终开发了可用于更好道路设计的设计图。样本道路用于查找车辆停留在道路上所需的运动转向角。运动转向角仅在极低的前进速度下才能很好地发挥作用。需要解决车辆运动的动态微分方程,以使在更高速度下研究车辆运动成为可能。在高向前速度行驶期间,某些因素将导致车辆在不同于所需运动路径的道路上行驶。生成的样本路证明,求解运动微分方程的传统方法不是很有效,特别是在运动数学路径复杂的情况下。这就是为什么要寻求一种新方法的原因,从而导致产生了稳态动态转向方法。该方法提供了一种研究车辆运动动力学的替代方法,事实证明,该方法比传统方法更快,更简单。最后,通过尝试不同的车辆行驶动作对新方法进行了测试。在验证了新方法之后,它通过自动驾驶汽车的数学原理在数学上用于控制汽车以自动行驶所需的样本运动路径。

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    Beikzadeh Marzbani H;

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  • 年度 2015
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