Abstract

Instability caused by emergency braking and steering during ambulance operation would easily lead to a sharp rise of blood pressure in patient’s head, which would further cause a secondary injury t...

Highlights

  • Ambulances are important in transporting injured patients as well as providing first aid to patients

  • The equivalent relative deformations of four cylinders are expressed as SK x, and the equivalent velocity flowing through accumulator damper valve (ADV), piston head damper valve (PHDV), and piston rod damper valve (PRDV) is respectively defined as SK x_, SH x_, and SRx_

  • In order to estimate the dynamic performance, the power spectral density (PSD) responses to random excitation inputs are taken into consideration

Read more

Summary

Introduction

Ambulances are important in transporting injured patients as well as providing first aid to patients. Motivated by the aforementioned discussion, this study presents a PR-IHPS system to improve stability and attenuate vibration for both lying patients and paramedics This new suspension system can achieve enhanced cooperative control of the bounce and pitch/ roll motion-modes for the ambulance. In section ‘‘Ambulance model with PR-IHPS,’’ the ambulance with pitch-roll-interconnected hydro-pneumatic suspension (APR-IHPS) model is developed Based on this model, the additional characteristics by APR-IHPS are discussed as shown in section ‘‘Characteristic analysis of PR-IHPS system.’’ In section ‘‘MESD method,’’ the MESD method for obtaining the vibration energy of each motion-mode in frequency domain is proposed, and the equations of solving MESD of APRIHPS are derived. The relationship can be applied to four-cylinder chambers

ÀSflT aSflT Àtf SflT SflT 0
Design approach
Results and discussions
Conclusion
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call