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首页> 外文期刊>Mechanical systems and signal processing >Further results on open-loop compensation of rate-dependent hysteresis in a magnetostrictive actuator with the Prandtl-Ishlinskii model
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Further results on open-loop compensation of rate-dependent hysteresis in a magnetostrictive actuator with the Prandtl-Ishlinskii model

机译：使用Prandtl-Ishlinskii模型对磁致伸缩执行器中与速率相关的磁滞进行开环补偿的进一步结果

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摘要

Apart from the output-input hysteresis loops, the magnetostrictive actuators also exhibit asymmetry and saturation, particularly under moderate to large magnitude inputs and at relatively higher frequencies. Such nonlinear input-output characteristics could be effectively characterized by a rate-dependent Prandtl-Ishlinskii model in conjunction with a function of deadband operators. In this study, an inverse model is formulated to seek real-time compensation of rate-dependent and asymmetric hysteresis nonlinearities of a Terfenol-D magnetostrictive actuator. The inverse model is formulated with the inverse of the rate-dependent Prandtl-Ishlinskii model, satisfying the threshold dilation condition, with the inverse of the deadband function. The inverse model was subsequently applied to the hysteresis model as a feedforward compensator. The proposed compensator is applied as a feedforward compensator to the actuator hardware to study its potential for rate-dependent and asymmetric hysteresis loops. The experimental results are obtained under harmonic and complex harmonic inputs further revealed that the inverse compensator can substantially suppress the hysteresis and output asymmetry nonlinearities in the entire frequency range considered in the study.
机译：除输出-输入磁滞回线外，磁致伸缩执行器还表现出不对称性和饱和性，特别是在中等到大幅度输入以及相对较高的频率下。这样的非线性输入输出特性可以通过速率依赖的Prandtl-Ishlinskii模型以及死区算子的函数来有效地表征。在这项研究中，建立了一个逆模型来寻求实时补偿Terfenol-D磁致伸缩执行器的速率相关和非对称磁滞非线性。逆模型是由与速率相关的Prandtl-Ishlinskii模型的逆（即满足阈值扩张条件）和死区函数的逆组成的。逆模型随后作为前馈补偿器应用于磁滞模型。所提出的补偿器被用作执行器硬件的前馈补偿器，以研究其对速率相关和非对称磁滞回路的潜力。在谐波和复谐波输入下获得的实验结果进一步表明，在研究中考虑的整个频率范围内，逆补偿器可以基本上抑制磁滞和输出不对称非线性。

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