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首页> 外文会议>Smart Structures and Materials 1999: Passive Damping and Isolation >Three different methods for the derivation of control laws for multi-degree-of-freedom systems containing electrorheological dampers
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Three different methods for the derivation of control laws for multi-degree-of-freedom systems containing electrorheological dampers

机译：推导包含电流变阻尼器的多自由度系统的控制律的三种不同方法

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Abstract: The minimization of unwanted vibrations is an important technical challenge. Purely passive systems often do not achieve the postulated results. Purely active systems are costly because of the required additional power and the necessary maintenance. Currently it seems that semi-active methods of vibration reduction are as competitive as any other methods. Semi-active damping control can be realized with electro- or magnetorheological fluids. These change their characteristic in the presence of an electric or magnetic field or by bypasses combined with magnetic valves. The methods known in linear control theory cannot be used for the controller design because no explicit external forces can be generated whenever they are needed. Forces can only be generated when relative velocities between the endpoints of the damper exist. It is important to investigate control methods which will reduce vibration with controlled damping. In this paper three different methods for establishing control laws are presented. The first is based on the consideration of power flow in the system. It is discussed in detail. The second method uses Bellmans dynamic optimization. The last transforms a multi degree of freedom system by modal analysis into uncoupled single degree of freedom systems. The control methods developed by these three methods all lead to the same vibration reduction strategy. The control laws are verified with simulation results. !11
机译：摘要：最小化不必要的振动是一项重要的技术挑战。纯粹的无源系统通常无法达到假定的结果。由于需要额外的电源和必要的维护，纯主动系统的成本很高。当前看来，半主动减振方法与其他方法一样具有竞争力。可以使用电或磁流变流体实现半主动阻尼控制。它们在存在电场或磁场的情况下或通过与电磁阀组合的旁路来改变其特性。线性控制理论中已知的方法不能用于控制器设计，因为无论何时需要它们都不会产生明显的外力。仅当阻尼器端点之间存在相对速度时才能产生力。重要的是要研究能够通过控制阻尼来减少振动的控制方法。本文提出了三种建立控制律的方法。第一种是基于对系统中功率流的考虑。详细讨论。第二种方法使用Bellmans动态优化。最后一种通过模态分析将多自由度系统转换为非耦合的单自由度系统。通过这三种方法开发的控制方法均导致相同的减振策略。仿真结果验证了控制律。 ！11

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