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16:50 ics Saal 4
A Study on Integration of Energy Harvesting System and Semi-Active Control for a Hydraulic Suspension System
Mao-Hsiung Chiang, National Taiwan University, Taiwan
Suspension systems are used to diminish the vibration of vehicles. The hydraulic
dampers in conventional suspension systems are mainly designed with the orifices of
the piston; however, the vibration energy will be transferred into waste heat. In recent
years, conventional vehicles with internal combustion engines and hybrid vehicles are
used commonly. However, with the gradual depletion of fossil fuels, electric vehicles are
developing. For this reason, the research focuses on recycling energy from the
suspension of vehicles to improve the vehicles endurance. The purpose of this study is
to develop a semi-active suspension control system with an energy harvesting system.
Instead of the fixed orifices in conventional vehicles, an adjusting damping force method
with variable resistance circuits system is studied for the semi-active suspension control
system. Thus, we are able to develop semi-active control to improve the riding comfort.
The energy harvesting system contains a hydraulic gear motor and a DC generator.
When vehicles vibrate, the hydraulic damper serves as a hydraulic pump to compress
the oil and drive the hydraulic motor. At the same time, the hydraulic motor drives the
generator to generate electricity which will be stored in a battery. In this study, the test
rig is the quarter-car system. We first design the novel hydraulic suspension system
combining with the energy harvesting system. The simulation of dynamic mathematical
model will be performed and analyzed by MATLAB/Simulink. Besides that, the semiactive
control by the fuzzy sliding mode controller will be realized in the hydraulic
suspension system with energy harvesting system. Finally, a test rig is set up for practical
experimental implementation and verification.