基于磁流变阻尼器的半主动控制方法研究

Study of Semi-active Control Method Based on Magnetorheological Damper

磁流变阻尼器具有温度适应性强、响应快、能耗低等优点,它在振动控制领域的应用被广泛关注,但由于其内在的非线性滞回力学特性,实际应用中并未充分发挥其优点。对磁流变阻尼器的动力学模型进行讨论,并对各种控制方法进行比较分析。根据其非线性滞回特性,提出二阶微分方程模型,并采用非线性反馈方法对其进行非线性反馈线性化控制。结果表明:基于二阶微分方程的模型能更好地拟合磁流变阻尼器非线性滞回特性,采用该模型进行非线性反馈控制能得到较好的控制效果。

With advantages of temperature adaptability,rapid response and low power consumption,magnetorheological damper is paid attention to using in vibration control area.But because of its inherent nonlinear hysteretic behavior,magnetorheological damper is restricted to use in practice.The dynamics models and control methods of magnetorheological damper were discussed and compared.Based on the nonlinear hysteretic behaviors of it,the second-order differential equation model was proposed and feedback linearization control was carried out by a nonlinear feedback method.The results show that the magnetorheological nonlinear hysteretic behavior is fitted better by making use of the second-order differential equation,and satisfied control result is obtained using this method.