In this paper, we present a solution without power consumption based on intelligently controlled action of the building external shading facilities, which is provided power supply by the third generation flexible solar cells. The signal, which is measured by wind, light, rain and temperaturesensors, is processed by the Microcontroller Unit system (MCU) controlling the motors of building external shading facilities, and then movement of the building external shading facilities is regulated to achieve the most comfortable of the indoor environment.
As an external shading facility for buildings, a new energy-saving external shutter is presented, which is intelligently controlled and without external power supply. The slats are driven by a motor which is powered by the third generation thin-film solar cells. The signals, which are measured by wind, light, rain and temperature sensors, are processed by a microcontroller system controlling the motor. According to a quick-response and high-efficiency control strategy, the movement of shutter is regulated to achieve the most comfortable indoor environment.
The dynamic of a type of play equipment, Big Pendulum Hammer, was modeled and simulated in computer and the approach of natural coordinates was adopted to build its equation of motion. In order to obtain appropriate natural coordinates, a two-step selection method was chosen, which based on concept of natural coordinate system (NCS). The two-step method treats selecting natural coordinates for a rigid element as building an actual NCS which should be adapted from a standard NCS. In order to automate the process of adaptation for 18 rigid elements in the model of Big Pendulum Hammer, a four-step self-adaptation method was also adopted, which can help automate the selection of natural coordinates for multi-rigidbody systems.
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