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Low back pain of workers is increased in workplaces that involve hard work. It is caused by excessive loading of the waist joint and muscle fatigue. Therefore, power-assist suits have been developed to decrease the load on the waist joint. However, previous power-assist suits have had problems such as low output or heaviness. Thus, we have developed an assist suit that is lightweight and exerts a...
A fuzzy comprehensive evaluation model based on cloud model which can be applied to evaluate air quality was established in this paper. Firstly, the basic content of the cloud model was introduced. The evaluation set, the weight set and the membership degree matrix based on the cloud model were discussed, and the evaluation model was established, which overcame the shortage of traditional fuzzy mathematics...
Traditional autopilots suffer from inherent flight path control objective conflict problems, as arbitrary flight path and speed targets cannot be maintained with saturated energy rate control. Elementary flight envelope protections are typically introduced to protect airspeed and prevent loss of control, but rather as a "last line of defense", than as a mean of smooth and deterministic control...
Variable air volume (VAV) air-conditioning system is considered an energy-efficient solution for multi-zones building, which can meet the stringent cooling and heating demands of occupants within individual zones. The role within this system is to feed zones with varying flow of constant temperature air independently supplied by an air-handling unit. A fault appearing in the VAV damper deteriorates...
This paper describes a dynamic modeling and control of a multizone building where the thermal exchange, the coupling between the areas and the human occupation energy are taken into account. The thermal regulation in the building is ensured by a HVAC (Heating, Ventilation and Air Conditioning) system in which many parameters are involved. The HVAC systems are the main equipment for human life, but...
The Desert Fireball Network is a sensor network on a continental scale, with the objective of recovering fresh meteorite falls and calculating associated heliocentric orbits. The network was first established in 2005 as a trial network of three (and later four) film camera observatories, which had immediate success with the successful recovery of meteorites in 2008 and 2010. The network was re-established...
High precision overlay alignment is of great importance to guarantee the quality of Roll-to-Roll printed electronics (R2RPE) products. Aiming at removing machining and assembling errors of the roller with both support and transport uses, an aerostatic bearing device with arrayed restrictors is proposed. In this paper the design of the whole device is presented. The mathematical model of the air film...
For quadrotor aircraft, atmospheric turbulence, wind shear, and model uncertainty are important factors which affect the quality of flight, or even lead to a failure of flight. In this paper, we consider the control problem of quadrotor aircraft with linear or nonlinear disturbances including model uncertainty. By employing backstepping technique, adaptive backstepping controllers are proposed which...
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