Studies on Stochastic Machine based on Stochastic Resonance and Bio-molecular Machine

本研究的最终目标是创造一种能在活体中发挥作用的能量转换装置（微致动器）。针对这一问题，构建了微致动器，并对其在水中的运动、能量转换机理进行了分析。为了开展常规振动人工肌肉的研究，我们将肌肉视为生物分子机器。提出了一种新的分子机器模型，即肌动蛋白-肌球蛋白系统的随机斜杆模型（SIRM），它的运动能量由随机噪声提供，并且总是向一个方向运动。SIRM结构简单，由倾斜弹簧、肌凝蛋白头和一束棒组成。在一个开放的系统中，肌凝蛋白头部作为随机噪声的谐振器，通过共振接受能量。结果表明，g -肌动蛋白的斜杆和球形结构是打破随机共振对称振动并产生单向运动的重要因素。虽然g -肌动蛋白和肌凝蛋白头的电位是完全对称的，但肌动蛋白-肌凝蛋白系统的结构使得不对称运动成为可能。我们用两种方法（微扰法和数值法）得到了SIRM的解。

The ultimate goal of this study is to create an energy transformation device (micro actuator) that functions in living bodies. Aiming this, we built a micro actuator and analyzed its motion, energy transformation mechanism in the water. To develop studies on conventional vibrating artificial muscles, we thought of muscle as biomolecular machine. This new model of molecular machine as Actin Myosin System named Stochastic Inclined Rods model (SIRM), whose energy of motion is supplied from random noise and always moves to one direction, has been proposed. SIRM has a simple structure, which is composed of an inclined spring, myosin head, and bundle of rods. In an open system, the myosin head works as a resonator of random noise, which accepts the energy through a resonance. It is shown that the inclined rod and a spherical shape of G-actin are very important elements for a purpose of breaking symmetric vibration of stochastic resonance and generating the one directional motion. Although the potentials of G-actin and the myosin head are completely symmetrical, the structure of the actin myosin system makes it possible to move asymmetry. We have got the SIRM's solution by two method (perturbative methods and numericalones)