Abstract. The action principle of a power-efficient actuator for transforming an applied force into translational movement is considered. An elastic element (which has the functioning principle based on the phenomenon of loss of stability) is used as an operating element of the device. An analysis of analogues of the proposed mechanism is presented. An actuator design is proposed, and the main components of the mechanism are described. Calculations of the mechanical properties are carried out. Conditions for the applicability of a working unit of the device (an elastic element) are formulated. It is supposed that the obtained results can be used in design of machines and mechanisms, in robotics area as a new type of power-efficient actuators, and in the process of bionic systems modeling.

Keywords: power-efficient actuator, stability of elastic system, supercritical behavior, executing device, elastic rod

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