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首页> 外文期刊>ISA Transactions >An energy-saving nonlinear position control strategy for electro-hydraulic servo systems
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An energy-saving nonlinear position control strategy for electro-hydraulic servo systems

机译：电液伺服系统的节能非线性位置控制策略

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摘要

The electro-hydraulic servo system (EHSS) demonstrates numerous advantages in size and performance compared to other actuation methods. Oftentimes, its utilization in industrial and machinery settings is limited by its inferior efficiency. In this paper, a nonlinear backstepping control algorithm with an energy-saving approach is proposed for position control in the EHSS. To achieve improved efficiency, two control valves including a proportional directional valve (PDV) and a proportional relief valve (PRV) are used to achieve the control objectives. To design the control algorithm, the state space model equations of the system are transformed to their normal form and the control law through the PDV is designed using a backstepping approach for position tracking. Then, another nonlinear set of laws is derived to achieve energy-saving through the PRV input. This control design method, based on the normal form representation, imposes internal dynamics on the closed-loop system. The stability of the internal dynamics is analyzed in special cases of operation. Experimental results verify that both tracking and energy-saving objectives are satisfied for the closed-loop system. (C) 2015 ISA. Published by Elsevier Ltd. All rights reserved.
机译：与其他致动方法相比，电动液压伺服系统（EHSS）在尺寸和性能上显示出众多优势。通常，它在工业和机械环境中的使用受到效率低下的限制。本文提出了一种节能的非线性反推控制算法，用于EHSS中的位置控制。为了提高效率，使用了两个控制阀，包括比例换向阀（PDV）和比例溢流阀（PRV）来达到控制目的。为了设计控制算法，将系统的状态空间模型方程式转换为它们的正规形式，并使用反步法对位置跟踪通过PDV设计控制律。然后，得出另一组非线性定律，以通过PRV输入实现节能。这种基于正常形式表示的控制设计方法将内部动力学施加到闭环系统上。内部动力学的稳定性在特殊情况下会进行分析。实验结果证明，该闭环系统既满足跟踪目标又达到节能目标。 （C）2015 ISA。由Elsevier Ltd.出版。保留所有权利。

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