What is it about?
The aim of this paper is to implement a strain sensor in the automotive tire.
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Why is it important?
To ensure safety and comfort, the automotive industry employs sensors to monitor the vehicle dynamics, with growing interest in intelligent tires. This paper specifically presents the design and validation of a dynamic load sensor proposed for integration in tires to allow active control of noise inside the cabin of the car.
Perspectives
Tire dynamics; Coherence; Strain maps for the tire; Capacitive strain transducer; Active noise and vibration control
Dr Hassan Hussein Hariri
Singapore University of Technology and Design
Read the Original
This page is a summary of: Performance validation of printed strain sensors for active control of intelligent tires, Applied Acoustics, August 2017, Elsevier,
DOI: 10.1016/j.apacoust.2017.03.011.
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Resources
Coherence maps for the tire for active noise and vibration control
Coherence maps on the scanning area between the vibration velocity and the applied force are obtained in the frequency range 20–250 Hz. Results show a good coherence in the overall area of the sidewall of the tire. The decrease in coherence on the top of the wheel is due to shadowing by the stringer of the dynamic shaker, and should therefore not be considered. Other decreases in coherence are still acceptable compared to the overall area of the sidewall of the tire. The study is conducted below 250 Hz to avoid the first natural frequency for the quarter-car test bench (wheelhop resonance mode) and is further restricted to the range 20–250 Hz due to the electronic limitation of the power amplifier used to supply the shaker. Nevertheless, this range limitation is adequate to represent the vertical ISO ‘‘good road” profile PSD of the displacement.
Capacitive Strain Transducer for active control of intelligent tires
UV-curable polyurethane (PU) prepolymer was used as an adhesive layer to clearly detach stamped silver nanoparticles (AgNPs) from a PDMS stamp and efficiently transfer it into the target substrate (PET in this case). The three main steps of the direct stamping are: (i) removal of AgNP residual layer (blue stripes) by an adhesive film after filling the stamp with AgNPs, (ii) UV-curing after the PDMS stamp is brought onto a substrate spread with PU prepolymer (yellow layer) and (iii) thermal curing of AgNPs after separation of the PDMS stamp.
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