The impact of the unbalanced rear wheel on the vibrating comfort of the child seat

Frej, Damian; Grabski, P

doi:10.1016/j.trpro.2019.07.096

Cited by 10 publications

(10 citation statements)

References 1 publication

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“…Similar conclusions were presented in the study in [52]. The influence of wheel unbalance on the vibration comfort of children was discussed in [53]. The result of the ergonomic comfort tests, during which the distribution of pressure of the child's body on the seat and backrest of child seats was analyzed, was a product-design assessment model (PDE) that facilitates the selection of materials and the angle of the backrest for manufacturers of child seats [54].…”

Section: Introductionmentioning

confidence: 52%

“…The result of the ergonomic comfort tests, during which the distribution of pressure of the child's body on the seat and backrest of child seats was analyzed, was a product-design assessment model (PDE) that facilitates the selection of materials and the angle of the backrest for manufacturers of child seats [54]. The result of this research is a model that makes it easier for child seat manufacturers to choose materials and tilt the backrests [51][52][53]. When reviewing the literature, it should be noted that child seats are mainly tested in terms of safety.…”

Section: Introductionmentioning

confidence: 99%

“…However, child seats currently available on the market are becoming more and more advanced. Vehicle seats with sensors informing whether the child has properly fastened seat belts now exists, as well as an ISOFIX base with a sensor that provides information about the correct fastening of the seat [50][51][52][53][54]. It should be noted, however, that there are solutions for child seats, which are additionally equipped with a temperature sensor and sensors that allow for blood pressure measurements [55][56][57][58][59][60], Equipping safety seats with various types of sensors increases ergonomic comfort and improves safety.…”

Section: Introductionmentioning

confidence: 99%

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Research and Analysis of the Propagation of Vertical Vibrations in the Arrangement of a Vehicle Seat—A Child’s Seat

Zuska

Frej

Jackowski

et al. 2021

Sensors

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This paper deals with the issues of the impact of vertical vibrations on a child seated in a child seat during a journey. Its purpose was to assess the impact of fastening the child seats and road conditions on the level of vibrations recorded on child seats. The paper describes the tested child seats, the methodology of the tests and the test apparatus included in the measuring track. The tests were carried out in real road conditions where the child seats were located on the rear seat of a passenger vehicle. One was attached with standard seat belts, and the other with the ISOFIX base. When driving on roads with three types of surface, the following vertical accelerations were measured: seat of the child seats, the rear seat of the vehicle and the ISOfix base. The recorded accelerations were first analyzed in the time domain and then in the frequency domain. Three indexes (r.m.s, rmq and VDV) were used to assess the vibration comfort. Research has shown that the classic method of fastening a child seat with standard seat belts is more advantageous in terms of vibration comfort. Calculated indicators confirmed the negative impact of separating the child seat from the rear seat of the vehicle using the IQ ISOFIX base.

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Section: Introductionmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research and Analysis of the Propagation of Vertical Vibrations in the Arrangement of a Vehicle Seat—A Child’s Seat

Zuska

Frej

Jackowski

et al. 2021

Sensors

Self Cite

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“…Currently, more attention is paid to safety of people and motor vehicles. Automotive threats are becoming more and more apparent due to increase in the number of vehicles traveling on the roads and capabilities achieved by the high-speed cars [1][2][3]. The classic division of passenger cars in Europe, as well as in Poland, is based on the size of vehicles There are 10 categories of passenger cars, each category has a different letter of the alphabet.…”

Section: Introductionmentioning

confidence: 99%

Simulation of a Dummy Crash Test in Adams

Jáskiéwicz¹,

Frej²,

Poliak³

2022

Komunikácie

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The article presents a model designed dummy for crash test in ADAMS. The simulated model dummy has dimensions, shapes and mass corresponding to a 50-percentile man. The simulation program allows modification of the dummy parameters. It allows to study the dynamics of motion, distribution of forces and loads of individual parts of the body of the simulated model. The article describes the design process and how to select the appropriate stiffness and damping joints for the simulated dummy. The article contains the results of simulation crash tests performed in the ADAMS program, which were compared to results of the Hybryd III dummy physical crash test. The simulation is designed to reflect the greatest compliance of the movements of individual parts of the human body during the low speed collision.

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“…also noted that the incorrect way of mounting the seat has an impact on increase in acceleration in the vertical direction. Results of the research included in [15] show that the degree of wheel imbalance affects the vibration comfort of a child placed in a child safety seat during the journey.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Tests of the Control of the Child Seats using Method for the Vibration Comfort of Children Transported in Them

Frej¹,

Zuska²,

Szumska³

2021

Komunikácie

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The article presents results of the laboratory studies of the impact of the child seats mounting method on the vibration comfort of children transported in them. The tested child seats were mounted forward facing the rear seat of a passenger car. The A seat was fastened with the ISOFIX base, while the B seat was fastened with standard car seat belts. During the tests, values of the vertical vibrations were measured on the seat of the child seat, the rear seat of the vehicle and the ISOFIX base. It was noted that the analyzed system, may be characterized by two different vibration transmission chains, which depend on the child seat mounting system (classic seat mounting system and ISOFIX system). These studies show the negative impact of using the ISOFIX base, which is confirmed by the Root Mean Square (RMS) values and the Vibration Dose Value (VDV), determined for the "A" seat secured with the ISOFIX base that were higher than the RMS and VDV for the "B" classic mounted seat.

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The impact of the unbalanced rear wheel on the vibrating comfort of the child seat

Cited by 10 publications

References 1 publication

Research and Analysis of the Propagation of Vertical Vibrations in the Arrangement of a Vehicle Seat—A Child’s Seat

Research and Analysis of the Propagation of Vertical Vibrations in the Arrangement of a Vehicle Seat—A Child’s Seat

Simulation of a Dummy Crash Test in Adams

Laboratory Tests of the Control of the Child Seats using Method for the Vibration Comfort of Children Transported in Them

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