Hydraulic Integrated Interconnected Regenerative Suspension: Modeling and Characteristics Analysis

Abstract

A novel suspension system, the hydraulic integrated interconnected regenerative suspension (HIIRS), has been proposed recently. This paper demonstrates the vibration and energy harvesting characteristics of the HIIRS. The HIIRS model is established as a set of coupled, frequency-dependent equations with the hydraulic impedance method. The mechanical–fluid boundary condition in the double-acting cylinders is modelled as an external force on the mechanical system and a moving boundary on the fluid system. By integrating the HIIRS into a half car model, its free and forced vibration analyses are conducted and compared with an equivalent traditional off-road vehicle. Results show that the natural frequency and the damping ratio of the HIIRS-equipped vehicle are within a proper range of a normal off-road vehicle. The root mean square values of the bounce and roll acceleration of the HIIRS system are, respectively, 64.62 and 11.21% lower than that of a traditional suspension. The average energy harvesting power are 186.93, 417.40 and 655.90 W at the speeds of 36, 72 and 108 km/h for an off-road vehicle on a Class-C road. The results indicate that the HIIRS system can significantly enhance the vehicle dynamics and harvest the vibration energy simultaneously.

Modeling and analysis of a hydraulic electric energy harvesting suspension

“…Currently, various types and properties of energy harvesting suspensions have been developed, and the energy recovery effects of these different types have been studied extensively. For instance, Guo et al [7] demonstrated that the proposed hydraulic integrated interconnect regenerative suspension for off-road vehicles can achieve average energy harvesting powers of up to 40.655, 90.36, and 72.108 W when speeds are 186, 93, and 417 km h −1 , respectively. Another study presented a hydraulic energy-harvesting shock absorber [8], which converts vibration energy into electricity through linear-to-angular motion conversion and motor control.…”

“…Another study by Guo et al studied a hydraulic integrated interconnect regenerative suspension system, which demonstrated a remarkable enhancement in the vehicle dynamics while harvesting vibration energy. Specifically, the root mean square (RMS) of the bounce and roll acceleration were 64.62% and 11.21% lower, respectively, compared to those of traditional suspensions [7]. Touairi and Mabrouki [15] performed timedomain simulation and electric power spectral density analysis on a piezoelectric harvester system, alongside proposing modeling technology.…”

Mechanically-driven energy harvester in railway freight system: Integrated modeling and performance analysis

“…According to the driving mechanism, they can be divided into hydraulic and mechanical types. Guo et al (2021) proposed a hydraulic VEH for off-road vehicles and analyzed the performance and system characteristics in frequency domain. An average power of 656 W was obtained at the operating speed of 108 km/h on Class-C road.…”

Editorial for the Special Issue on Smart Devices and Systems for Vibration Sensing and Energy Harvesting

“…This Special Issue focuses on state-of-the-art vibration sensing and energy harvesting technologies. After being carefully reviewed, 11 articles have been accepted for publication in this Special Issue [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ] that can be divided into three aspects: (i) new materials for vibration energy harvesting applications, (ii) design and fabrication of vibration energy harvesters (VEHs), and (iii) system-level integration and testing of VEHs.…”

“…By designing the energy management circuit at the rear end of the device, the packaged device can directly export a 3.3 VDC voltage to supply power to most of the sensing equipment [ 14 ]. A novel hydraulic interconnected regenerative suspension was reported by Guo et al [ 15 ]. The root means square values of the bounce and roll acceleration of the proposed system are 64.62% and 11.21% lower than that of a standard suspension, respectively.…”