Earthquake disasters are inevitable, and in recent years, major earthquakes have caused great losses of life and property. To prevent such losses, structures must have sufficient earthquake resistance to preserve the lives of the occupants. Structural control can improve the shock resistance of structures, the actuator is the key issue of the control system. A new prototype of actuator, a neutral equilibrium mechanism (NEM), is proposed in this study. It automatically recovers the energy of the stiffened component of structure. The internal force and energy of the stiffened component can be fully balanced under ideal conditions, namely, no friction force and precise control by this proposed NEM. A NEM can operate with a small amount of energy, requiring only a miniature servo actuator. A prototype of a NEM is verified in experiment. (1) The experimental components of the basic machine test include the following: body friction of the NEM, connecting rod friction, main spring elastic constant, balance spring elastic constant and zero correction. (2) Performance verification of the NEM: The experimental method verifies that the body and the connecting rod have little friction and find the elastic constants of the main spring and balance spring, and the value of zeroing calibration. (3) Efficiency validation of a NEM displays that the little unbalanced force can be provided by a NEM to balance large force, generated by the control mechanism. The magnification factor of this proposed NEM is more than 200. Test results demonstrate that a NEM can achieve a large energy-saving effect without being time-consuming, so the power demand of a NEM can be greatly reduced when applied to structural control.

地震灾难是不可避免的，近年来，大地震造成了巨大的生命和财产损失。为了防止此类损失，建筑物必须具有足够的抗震能力，以保护居住者的生命。结构控制可以提高结构的抗冲击性，执行器是控制系统的关键问题。在这项研究中提出了一种新的执行器原型，即中性平衡机构（NEM）。它会自动恢复结构的加劲部件的能量。可以在理想条件下完全平衡加劲部件的内力和能量，即无摩擦力，并且可以通过建议的NEM进行精确控制。NEM可以以少量能量运行，仅需要微型伺服执行器。实验验证了NEM的原型。（1）基础机器测试的实验组成部分包括：NEM的主体摩擦，连杆摩擦，主弹簧弹性常数，摆轮弹簧弹性常数和零位校正。（2）NEM的性能验证：实验方法验证了主体和连杆的摩擦力是否很小，并找到了主弹簧和游丝的弹性常数，以及调零校准的值。（3）NEM的效率验证显示，NEM可以提供很小的不平衡力来平衡由控制机制产生的大力。拟议中的NEM的放大倍数大于200。测试结果表明，NEM可以在不耗时的情况下实现较大的节能效果，