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An increased coupling-based control method for underactuated crane systems: Theoretical design and experimental implementation

机译:欠驱动起重机系统的一种基于耦合的增强控制方法:理论设计和实验实现

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摘要

A novel increased coupling-based nonlinear control strategy is proposed for underactuated overhead crane systems, which guarantees both fast trolley positioning and sufficient payload swing elimination performance. The developed controller is applicable to both regulation control and trajectory tracking control. To artificially increase the trolley-translation/payloadswing internal coupling, a payload position-like composite variable is introduced and a corresponding elegant error signal is then constructed, based on which a novel control law is designed to transform the overhead crane system into an interconnected system consisting of two subsystems with respect to (w.r.t.) the constructed error signal and the payload swing angle, respectively. Both subsystems are proven to be inputto- state stable (ISS); by invoking the small gain theorem, we show that the overall interconnected system is also ISS. LaSalle's invariance theorem further proves that the system states asymptotically converge to the desired equilibrium point. Experimental results are included to demonstrate the feasibility and effectiveness of the proposed method and also its superior control performance over some existing schemes.
机译:针对欠驱动桥式起重机系统,提出了一种新颖的基于耦合的新型非线性控制策略,该策略可确保快速的手推车定位和足够的有效载荷摆动消除性能。开发的控制器适用于调节控制和轨迹跟踪控制。为了人为地增加手推车平移/有效载荷内部耦合,引入了有效载荷位置类似的复合变量,然后构造了相应的优雅误差信号,在此基础上,设计了一种新颖的控制律,将高架起重机系统转换为互连系统分别由两个子系统组成,分别关于(wrt)构造的误差信号和有效载荷摆角。两个子系统都被证明是状态稳定的输入(ISS)。通过调用小增益定理,我们证明了整个互连系统也是ISS。 LaSalle不变性定理进一步证明,系统状态渐近收敛至所需的平衡点。实验结果包括证明该方法的可行性和有效性,以及相对于某些现有方案的优越控制性能。

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