Two-Level Modeling Based Intelligent Integration Control for Time-Varying Forging Processes

Lu, XinJiang; Huang, Minghui

doi:10.1021/acs.iecr.5b01052

Cited by 10 publications

(1 citation statement)

References 28 publications

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“…3,4 Benefiting from its nonlinear essence, the fuzzy control can overcome the nonlinearities of the electro-hydraulic system to a certain extent and is widely applied in the motion/speed control problem of the electro-hydraulic system. 5–9 However, the design of fuzzy rules depends largely on the experience of engineers and there is no systematic method to design the fuzzy rules, which heavily limits the application of the fuzzy control. The neural network control, 10,11 as an important branch of the intelligent control, provides another approach to solve the motion/speed control problem of the electro-hydraulic system and has attracted a lot of researchers’ attention.…”

Section: Introductionmentioning

confidence: 99%

Adaptive robust motion control of a fast forging hydraulic press considering the nonlinear uncertain accumulator model

Zhang

Fang

Wei

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part I:

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This article focuses on the high-performance motion control of an accumulator assistant fast forging hydraulic press. As the accumulator has a significant impact on the motion control performance of the fast forging hydraulic press, the dynamic and static characteristics of the accumulator are studied and a simplified mathematical model is applied in the motion controller design. To hold the nonlinear parameter uncertainty associated with the accumulator model, a nonlinear damping regulator and a nonlinear robust feedback are synthesized based on the simplified mathematical model. The virtual control law “lumped flow” is proposed to act as the equivalent input of the fast forging hydraulic press, which successfully solves the decoupling problem and makes the motion controller design feasible. And the most economical distribution scheme is finally applied to synthesize the actual control law for each fast forging valve. In consideration of the parametric uncertainties and uncertain nonlinearities appearing in the mathematical model of the accumulator assistant fast forging hydraulic press, the discontinuous projection-based adaptive robust control is extended to synthesize the motion controller. Both simulation and experiment results demonstrate that with the proposed motion controller, the transient performance and final tracking accuracy are guaranteed although the system is subjected to various model uncertainties coming from both parametric uncertainties and uncertain nonlinearities. Furthermore, with the proposed nonlinear damping regulator, the influence of the accumulator can be well compensated and the control performance is improved.

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