Accuracy and errors in road measurements of braking deceleration

The article presents an analysis of the accuracy of measuring vehicle braking deceleration during road tests for instruments approved for use in vehicle inspection stations as control devices. The influence of body pitch on the obtained deceleration values was evaluated, and the results of road measurements performed using various methods were discussed.1. INTRODUCTION
During road tests related to vehicle braking systems, modern research methods are based on specialized measuring equipment that allows for the recording of the vehicle’s braking process. In general, it can be stated that braking deceleration can be measured by accelerometric instruments using the principle of a moving mass acting on a force sensor, thereby enabling the determination of the deceleration value acting on that mass, or based on the recording of vehicle speed changes by the instrument.
In accordance with current regulations, inertial decelerometers are used in practice at diagnostic stations when measurements on the road are required [1, 2].
The article discusses the results of an analysis of braking deceleration measurements of a passenger car, performed with instruments approved for use as control devices for assessing the condition of vehicle braking systems in vehicle inspection stations (SKP). The analysis took into account the body movements of the tested vehicle and evaluated their impact on the obtained results. (…)

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