首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >INDEPENDENT MODAL SLIDING MODE SHAPE AND VIBRATION CONTROL USING A STEREOPHOTOGRAMMETRIC MEASUREMENT SYSTEM
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INDEPENDENT MODAL SLIDING MODE SHAPE AND VIBRATION CONTROL USING A STEREOPHOTOGRAMMETRIC MEASUREMENT SYSTEM

机译:使用立体光学测量系统的独立模态滑模形状和振动控制

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The last decade has seen the advent of active aperture antennas and other large distributed parameter systems. These antennas have the capability to change their shape to resemble a desired radiation pattern. In this study a method to simultaneously achieve active shape and vibration control of distributed parameter systems is presented. The optimal actuator location is computed for a desired profile using non-linear optimal programming techniques. For most shape control applications the actuator and sensor dynamics are much faster than the structural dynamics and slow shape changes are sufficient, thus quasi-static analysis is sufficient. The quasi-static actuation forces for the desired profile are then calculated by using independent modal space control (IMSC) principles. Quasi-static shape control is then implemented in a closed loop control using a 3-D photogrammetry sensing system. A sliding mode controller is designed for each dominant mode such that it drives the error between the required and actual modal contribution to zero. Conventional sliding mode controllers are discontinuous in nature and they might cause "control spillover". This is avoided by using an "observer-based" solution.
机译:过去十年见证了有源孔径天线和其他大型分布式参数系统的出现。这些天线具有改变其形状以类似于所需辐射图的能力。在这项研究中,提出了一种同时实现分布参数系统的主动形状​​和振动控制的方法。使用非线性最佳编程技术为所需轮廓计算最佳执行器位置。对于大多数形状控制应用,执行器和传感器的动力学要快于结构动力学,并且缓慢的形状变化就足够了,因此准静态分析就足够了。然后,通过使用独立的模态空间控制(IMSC)原理来计算所需轮廓的准静态驱动力。然后使用3-D摄影测量传感系统在闭环控制中实现准静态形状控制。滑模控制器针对每种主导模式进行设计,从而将所需模态贡献与实际模态贡献之间的误差驱动为零。传统的滑模控制器本质上是不连续的,可能会导致“控制溢出”。通过使用“基于观察者”的解决方案可以避免这种情况。

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