Variable-rigidity air spring and rigidity regulation and control method thereof

Abstract

The invention relates to a variable-rigidity air spring design and a rigidity regulation and control method thereof, and an air spring body design, a rigidity prediction model and a rigidity regulation mode are mainly involved. The air spring is characterized in that the air spring bears a vertical load and is structurally composed of at least one layer of curved bag. Curved bags of the air springare in communication by means of air holes, the air holes are formed in the middle of the lower surface of the air bag on the lowermost layer of the air spring and are assembled with different typesof connectors, and different combination forms of the air spring are achieved through hose connection. The vertical rigidity of the air spring is nonlinearly changed, a mathematical model about the height of the air spring of any initial pressure, any initial volume of air spring load and internal air pressure can be obtained through multiple times of fitting, the rigidity and height of the air spring are accurately adjusted by changing the internal air pressure, the initial air pressure and the like, and rigidity self-adaption is achieved.

Description

technical field [0001] The invention relates to a design of a variable stiffness air spring, a stiffness prediction mathematical model and a stiffness control method. Background technique [0002] About one-third of a person's life is spent on the sleep system, so the supporting effect of the sleep system affects people's physical and mental health. The main function of the sleep system (the combination of mattress and bed frame) is to support the human body. By providing appropriate human body support, the human muscle tissue and lumbar intervertebral discs can recover from the continuous load received by daytime physical activities. The main objective evaluation indicators of the support quality of the sleep system are the distribution of surface contact pressure and the shape of the spine in the supine position. During human sleep, the pressure distribution of the human-bed interface and the shape of the spine in the supine position are affected by the mattress material,...

AI Technical Summary

Problems solved by technology

However, the existing support structures with adjustable hardness are mainly strip-shaped or block-shaped airbags, whose changing process is difficult to predict and the adjustment is relatively wide due to the large area of ​​the single body, and it is impossible to make corresponding adjustments according to the spine shape in the prone position

In addition, because the deformation process is difficult to predict, it is impossible to establish a more accurate mathematical model to predict and control the hardness and height of different contact parts between the mattress and the human body

Images