ACTIVE SHOCK CONTROL BY INSTANTANEOUS LOCALIZATION OF ELEMENT DEFORMATION

为了实现材料瞬时变形的主动控制，研究了从背面向受激物施加推力的激振器对冲击的主动控制，以及在受激物中插入致动器对冲击的主动控制。前者的控制问题可以看作是在伺服压力机上的应用。给出了碰撞物体间适当的接触力，并从最优控制的角度对状态反馈控制进行了验证。其次，对物体的变形和加速度施加约束，并对碰撞物体之间必须给定的接触力基准进行优化。结果，能够对冲击接收对象给予单侧变形，并且变形的局部化成为可能。从实验结果来看，为了获得理想的瞬时接触力参考作为响应，采用了由前馈控制和反馈控制组成的两自由度控制系统。结果，改善了目标值实现性能，并且能够控制瞬时响应。另外，将后一种情况应用于轿车正面碰撞时的乘员保护控制问题。验证了仪表板与乘员膝部接触力基准的设计方法。并利用多体动力学分析对三维模型进行了仿真，验证了主动控制抑制乘员腰部运动量和加速度，减少腿部重量的有效性。

Active control of shock with an actuator which gives thrust to the shock-giving object from the backside, and active control of shock with an actuator which is inserted in the shock-receiving object, are examined aiming at the achievement of an active control to localize the material deformation instantaneously. The former control problem can be regarded as an application to the servo press. The appropriate contact force between the colliding objects is given, and from the viewpoint of the optimal control the state feedback control is verified. Next, the restriction was imposed on the deformation and the acceleration of the object, and the contact force reference that had to be given between the colliding objects is optimized. As a result, the one-sided deformation is able to be given to the shock-receiving object, and the localization of the deformation becomes possible. From the result of experiment, to achieve an ideal contact force reference instantaneously as the response, the two-degree-of-freedom control system, which consists of feedforward control and feedback control, is utilized. As a result, the target value attainment performance is improved, and a transient response is able to be controlled. In addition, the latter case is applied to the occupant protection control problem when the car front side collides is examined. The design method of the contact force reference between the instrument panel and the occupant knee is verified. Also, by using the simulation of the three-dimensional model with the multi-body dynamics analysis, the effectiveness of an active control suppressing the amount of the movement and the acceleration of the waist of the occupant as well as decreasing the lower extremities is verified.