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arXiv 1707.04515eess.SYcs.SY
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高斯过程模型预测控制无人机

Gaussian Process Model Predictive Control of An Unmanned Quadrotor

Massey University(梅西大学);Auckland University of Technology(奥克兰理工大学)

Gang Cao, Edmund M-K Lai, Fakhrul Alam

AI总结:

本文提出基于高斯过程的模型预测控制方法,用于无人机轨迹跟踪,通过概率高斯过程模型获取动态模型,结合分层控制结构,实现约束下的高效控制。

摘要:

本文针对具有输入输出约束的无人机模型预测控制轨迹跟踪问题,通过概率高斯过程模型获取动态模型,不同于传统基于牛顿分析的模型。采用分层控制结构,外环处理平移子系统,内环处理旋转子系统。分别为两个子系统制定约束高斯过程基于MPC。所得到的MPC问题通常是非线性和非凸的。我们推导出一个基于高斯过程的局部动态模型,使这些优化问题可以放松为凸问题,可以使用简单的主动集算法高效求解。所提方法的性能与现有无约束非线性模型预测控制(NMPC)进行比较。仿真结果表明,两种方法在轨迹跟踪性能上相似。然而,我们的方法具有在控制输入上引入约束的优势。此外,我们的方法仅需NMPC的20%的计算时间。

英文摘要:

The Model Predictive Control (MPC) trajectory tracking problem of an unmanned quadrotor with input and output constraints is addressed. In this article, the dynamic models of the quadrotor are obtained purely from operational data in the form of probabilistic Gaussian Process (GP) models. This is different from conventional models obtained through Newtonian analysis. A hierarchical control scheme is used to handle the trajectory tracking problem with the translational subsystem in the outer loop and the rotational subsystem in the inner loop. Constrained GP based MPC are formulated separately for both subsystems. The resulting MPC problems are typically nonlinear and non-convex. We derived 15 a GP based local dynamical model that allows these optimization problems to be relaxed to convex ones which can be efficiently solved with a simple active-set algorithm. The performance of the proposed approach is compared with an existing unconstrained Nonlinear Model Predictive Control (NMPC). Simulation results show that the two approaches exhibit similar trajectory tracking performance. However, our approach has the advantage of incorporating constraints on the control inputs. In addition, our approach only requires 20% of the computational time for NMPC.

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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