Design, experimental modeling and analysis of compact double-gas-chamber hydro-pneumatic strut. (1st June 2022)

• Record Type: Journal Article
• Authors: Li, Ruihong; Yang, Fan; Lin, Dezhao
• Is Part Of: Mechanical systems and signal processing. Volume 172(2022)
• Publication Date: 2022-06-01
• Subjects: Double-gas-chamber hydro-pneumatic strut (DHPS) -- Experimental modeling -- Coupled relationship -- Friction property -- Fail-safe property; Structural dynamics -- Periodicals; Vibration -- Periodicals; Constructions -- Dynamique -- Périodiques; Vibration -- Périodiques; Structural dynamics; Vibration; Periodicals; 621
• DOI: 10.1016/j.ymssp.2022.109015
• Languages: English
• ISSNs: 0888-3270

Abstract

Highlights: Evaluating coupled inner parameters caused by double floating piston experimentally. The property of compact DHPS can be modified in large range. Providing the ability of switching modes in the passive method. Providing one possibility to achieve the semi-active/active vibration control design. Demonstrating the fail-safe property under failure condition. Abstract: The compact double-gas-chamber hydro-pneumatic strut (DHPS) integrating two gas chambers can achieve compact design purpose with the ability of switching working modes, and then have great application potential in the area of the Hydro-pneumatic interconnected suspension (HIS) system and/or other vibration suppression components design. The dynamic property of the compact DHPS shows complicated phenomenon as the flow relationship and pressure balance are both coupled each other and with the polytropic processes, damping and friction properties. In this study the mathematic model will be proposed based on the extensive experimental study applying on the designed prototype to describe the dynamic property of the compact DHPS. The coupled flow relationship and pressure distribution associated with the polytropic processes, damping and friction properties will be decoupled and evaluated step by step based on the designed experiments. The validity of the proposed mathematic model has been verified through extensive experimental data. It has been shown that the coefficient of determination (R 2 ) between the experimental data and the model estimation result is around 0.97 subjected to different kinds of excitation signals. The result also revealed that the compact DHPS can not only provide the ability of switching modes in the passive method, but the dynamic property of the compact DHPS can be easily modified in large range by modifying pre-charging pressure of the extra (secondary) gas chamber. Therefore, the compact DHPS design can provide one possibility to achieve HIS suspension design and/or other vibration suppression components design to match different practical working condition with the fail-safe property, as the main gas chamber can always keep the fundamental buffer performance with/without the extra (secondary) gas chamber.