It can convert electrical energy into mechanical energy, which can be used for precise control of LCE composite materials under electro-thermal drive. In terms of electric drive, electrothermally driven vibration of LCE materials has attracted the attention of many scholars. Vibration of beams, plates and shells induced by excitation of magnetic field, light and heat is widely used in aerospace, mechanical and civil engineering and other fields. Generally, the response of LCE materials to these stimuli is rapid and reversible, and therefore LCE materials have a wide range of promising applications in many fields, such as artificial muscles, micro-systems and micro-electromechanical systems, actuators and sensors, energy harvesters, scalable optical devices, soft robots, new materials, etc. The shape change of LCEs can generally be programmed during fabricating by orienting the liquid crystal phase prior to crosslinking. Liquid crystal elastomers (LCEs) are a class of stimuli-responsive polymers that can undergo shape-change in response to external stimuli, such as heat, electric field, light magnetic field and chemical substances. The results of this study are instructive for the design of soft robots and LCE-based electric locomotives. The application examples of LCE materials show that periodic electrothermally driven LCEs have promising applications. For the optimum periodic mode, the vibration amplitude of the spring oscillator is affected by the current heat, damping coefficient, gravital acceleration, spring constant and shrinkage coefficient, but not by the initial velocity. In a small damping system, there exist optimal sets of electrothermal drive period and electrothermal drive time rate to maximize the system amplitude. With the increase of time rate, the vibration amplitude increases first and then decreases. The results show that the periodic electrothermal drive can cause periodic vibration of the LCE spring oscillator. Based on the dynamic LCE model, the dynamic governing equation of the LCE spring oscillator is established, and the time history curves of the vibration are obtained by numerical calculations. In this paper, the vibration behavior of LCE spring oscillator under periodic electrothermal drive is studied theoretically. Periodic electric actuation is a common method of active control with potential applications in the fields of micro-actuators. Counter flashing insures water tight seal.The oscillations of electrically actuated thermally-responsive liquid crystal elastomer (LCE) microfibers under cyclic electric actuation have been discovered in recent experiments. provided with 2” x 4” wood nailing strips and an 9”Ĭontinuous rubber counter flashing.1”, 2”, and 3” spring deflection available.Isolators are sized and spaced to accommodate the rooftop weight and center of gravity for a minimum of 90% isolation efficiency. Flexible counter flashing provides a weather tight seal and easy access to the isolation springs. This process will reduce installation costs and expedites the installation process. RTU can be mounted immediately after the Vibro-Curb III ™ is installed and roofing can be completed at a later date without disturbing the RTU. Vibro-Curb III ™ incorporate adjustable spring isolators and can ship as a single piece unit.
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