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    • 3. 发明授权
    • Apparatus and method for controlling the shape of structures
    • 用于控制结构形状的装置和方法
    • US5531407A
    • 1996-07-02
    • US277416
    • 1994-07-18
    • Fred AustinGareth J. KnowlesMichael J. Rossi
    • Fred AustinGareth J. KnowlesMichael J. Rossi
    • B64C3/38B64C3/48G06F19/00B64C3/44
    • B64C3/48Y02T50/145
    • An apparatus and method control the shape of a structure with one or more surfaces and internal actuators. A plurality of translational actuators are capable of extending and contracting. The structure can have any number of controllable surfaces, including one. The shapes of the surfaces are controlled by computing the actuator strokes or loads required for achieving specified surface deflections. There are two methods for accomplishing this control. In the actuator stroke-control method, the surface deflections, or deflection errors for closed-loop control, are multiplied by a stroke-control gain matrix which is a function of the properties of the structure with the actuators absent. In the actuator load-control method, the surface deflections, or deflection errors for closed-loop control, are multiplied by a load-control gain matrix which is a function of the properties of the structure with the actuators absent. The control gain matrices minimize the surface shape errors. Ratios of stresses to allowable values are continuously monitored throughout the structure and corrective action is taken to prevent an overstressed condition.
    • 一种装置和方法用一个或多个表面和内部致动器控制结构的形状。 多个平移致动器能够伸缩。 该结构可以具有任意数量的可控表面,包括一个。 通过计算实现特定表面挠曲所需的致动器行程或载荷来控制表面的形状。 实现这种控制有两种方法。 在执行器行程控制方法中,闭环控制的表面偏转或偏转误差乘以行程控制增益矩阵,该行程控制增益矩阵是不存在执行器的结构特性的函数。 在执行器负载控制方法中,闭环控制的表面偏转或偏转误差乘以负载控制增益矩阵,该增益矩阵是不存在执行器的结构特性的函数。 控制增益矩阵使表面形状误差最小化。 在整个结构中不断地监测应力对允许值的比例,并采取纠正措施来防止过应力状态。