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arXiv 2204.06136eess.SYcs.SY
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结合模型预测控制与控制障碍函数的车道保持与避障

Simultaneous Lane-Keeping and Obstacle Avoidance by Combining Model Predictive Control and Control Barrier Functions

Sven Brüggemann, Drew Steeves, Miroslav Krstic

摘要:

本文将模型预测控制(MPC)与控制障碍函数(CBF)设计方法相结合,提出了一种同时实现车道保持和避障的递阶控制律:在低层,MPC通过轨迹跟踪实现车道保持和避障;在高层次上,设计了不同的基于CBF的安全滤波器,确保LK和OA在一些实际场景中进行比较。特别是,我们表明,指数安全(ESf)和规定时间安全(PTSf)过滤器,在必要时覆盖MPC控制,导致可行的二次规划时,安全的优先级适当。我们还研究控制设计输入约束,通过使用输入约束CBF。最后,我们比较了ESf,PTSf,和他们的输入受限的同行的组合的性能相对于LK和OA的目标在两个模拟研究早期和晚期检测到的障碍物的情况。

英文摘要:

In this work, we combine {Model Predictive Control} (MPC) and Control Barrier Function (CBF) design {methods} to create a hierarchical control law for simultaneous lane-keeping (LK) and obstacle avoidance (OA): at the low level, MPC performs LK via trajectory tracking during nominal operation; and at the high level, different CBF-based safety filters that ensure both LK and OA are designed and compared across some practical scenarios. In particular, we show that Exponential Safety (ESf) and Prescribed-Time Safety (PTSf) filters, which override the MPC control when necessary, result in feasible Quadratic Programs when safety is prioritized appropriately. We additionally investigate control designs subject to input constraints by using Input-Constrained-CBFs. Finally, we compare the performance of combinations of ESf, PTSf, and their input-constrained counterparts with respect to the LK and OA goals in two simulation studies for early- and late-detected obstacle scenarios.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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