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首頁> 外文期刊>Intelligent Transportation Systems, IEEE Transactions on >Should the Desired Heading in Path Following of Autonomous Vehicles be the Tangent Direction of the Desired Path?
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Should the Desired Heading in Path Following of Autonomous Vehicles be the Tangent Direction of the Desired Path?

機(jī)譯:自主車輛在路徑上的期望航向是否應(yīng)該是期望路徑的切線方向?

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摘要

The path-following problem for autonomous vehicles is investigated in this paper. The desired vehicle heading is commonly chosen as the tangent direction on the desired path. This paper points out that the traditional definition of the desired heading may deteriorate the path-following performance, particularly when the vehicle is tracking a path with large curvature. That is because the sideslip angle control and the yaw rate control are conflicting in the presence of sliding effects, and the sideslip angle does not equal to zero when the vehicle is tracking a curve path. This paper further provides an amendment to the definition of the desired heading, which realizes a more accurate path-following maneuver. In the controller design phase, backstepping is used to generate the required yaw rate, and an LQR controller is adopted to obtain the optimal active front steering input. The CarSim–Simulink joint simulation verifies the reasonability of the amendment to the desired heading.
機(jī)譯:本文研究了自動駕駛汽車的路徑跟蹤問題。通常將期望的車輛航向選擇為期望路徑上的切線方向。本文指出,傳統(tǒng)的期望航向定義可能會降低路徑跟蹤性能,特別是在車輛跟蹤大曲率的路徑時。這是因?yàn)樵诖嬖诨瑒有Ч那闆r下,側(cè)滑角控制和橫擺率控制沖突,并且當(dāng)車輛跟蹤彎道時,側(cè)滑角不等于零。本文還對所需航向的定義進(jìn)行了修正,從而實(shí)現(xiàn)了更精確的路徑跟蹤操縱。在控制器設(shè)計階段,使用后推來生成所需的橫擺率,并采用LQR控制器來獲得最佳的主動前轉(zhuǎn)向輸入。 CarSim–Simulink聯(lián)合仿真驗(yàn)證了對所需航向的修正的合理性。

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