Parametric synthesis of the electronic control unit of the course stability system of the car

Topicality. When creating ESP (Electronic Stability Program) car stability systems, the main task is to determine the values of the varied parameters of the EBD (Electronic Brake Distribution) electronic block, which ensure the required accuracy of stabilization of the car body in urgent braking mode relative to the given direction of movement. The purpose of the article. To solve the problem of parametric synthesis of the EBD block, it is necessary to create a simulation model of external disturbances acting on the car body from the side of the road surface. Well-known simulation models are created for car movement modes on a random surface with a constant speed. At the same time, random external disturbances are stationary in nature. The urgent braking mode is characterized by an intense decrease in the current speed of the car. Results. The paper proposes a method of constructing a random function of an external disturbance acting on the car body in urgent braking mode. It is proved that this perturbation is non-stationary in nature; the forming dynamic link, the input of which is supplied with single "white noise", and the output of which is an external disturbance, is an oscillating dynamic link, the gain and time constants of which depend on the current value of the car's speed during urgent braking.

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“…Development of a simulation model. The works [3,4] obtained expressions for the correlation function and…”

Section: Main Materialsmentioning

confidence: 99%

“…In work [4], the dynamic link, the input of which is supplied with single "white noise", and the output is a random signal with the given correlation function and spectral density, is called a forming dynamic link.…”

Section: Table 1 -Values Of Correlation Coefficients and Dispersions ...mentioning

confidence: 99%

Simulation of Random External Disturbance Acting on the Car Body in the Urgent Braking Mode

Aleksandrov

Александрова²,

Kostianyk³

et al. 2023

A.I.S.

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“…x vtthe current speed of the car; Mmass of the car; gacceleration of gravity; Ithe moment of inertia of the car body relative to its own central vertical axis of inertia; Btrack width; In works [7,9], the control signal ( ) ut was formed in the form…”

Section: Main Materialsmentioning

confidence: 99%

Parametric Synthesis of the Invariant System of Car Course Stability

Aleksandrov

Александрова

Kostianyk

et al. 2023

A.I.S.

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The problem of constructing the invariant stabilizer of the ESP (Electronic Stability Program) car course stability system is considered by implementing two control principles by the electronic brake force distribution unit EBD (Electronic Brakeforce Distribution) – the principle of control by deviation and the principle of control by external disturbance. The values of the variable parameters of the stabilization algorithm are selected from the conditions for minimizing both the static and dynamic errors of the system. Two brake fluid pressure sensors are introduced into the EBD structural-functional scheme in the brake lines of the right and left sides of the car. It is proven that the pressure difference of the brake fluid, which is measured by pressure sensors, is proportional to the external disturbance acting on the car body from the side of the road surface. Therefore, in order to give the ESP system the property of invariance to external disturbances, the control signal generated by the EBD electronic unit contains current information not only about the parameters of the disturbed movement of the car, namely, about the angle of deviation of the longitudinal axis of the car relative to the given direction of movement, about the angular velocity of rotation of the body relative to its vertical axis and about lateral displacement of the center of mass of the body, but also the current information about the external disturbance acting on the car body. Recommendations for choosing the values of variable parameters of the ESP system stabilizer are given, which ensure the minimization of both static and dynamic errors of the closed system in the emergency braking mode.

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“…The above publications discuss VSC and EBD systems used in luxury passenger cars. Problems of increasing the heavily loaded refueling vehicle stability are studied by scientists of Ukraine, Belarus and Russia for such RVs: KrAZ [11][12][13][14][15], KAMAZ, URAL and MAZ [9,10], which are equipped with tanks with a volume of 20 m 3 . Belarusian researchers are developing ways to reduce the impact of fuel fluctuations in the RV tank by introducing special fuel tank construction, on the contrary Ukrainian and Russian scientists are developing ways to improve the VSC and EBD systems.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, in the article [11] the application of a block of command devices and algorithms of a platformless inertial system is proposed, and in [12] the structural and functional scheme of the electromagnetic system VSC is proposed. In [13,14] the problem of parametric synthesis of the digital EBD system for KrAZ-63221 is solved. In [15], a mathematical model of the perturbed motion of the RV considering the oscillations of the free surface of the fuel in the tank presented.…”

Section: Introductionmentioning

confidence: 99%

About Stability of the Movement of the Refueling Vehicle Equiped With Digital System of Brake Forces Distribution During the Emergency Braking

Aleksandrov

Александрова

Morgun

2021

A.I.S.

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The impact of enforced oscillations of the free surface of fuel in the car tank on the stability area of a closed digital brake force distribution system is considered. The object of the study is the process of stabilized movement of the tanker during the emergency braking. The subject of the study is a large tanker with a gross weight (3-3.5) *104 kg, equipped with a tank with a volume of (17-20) m3 and a system of direction stability. The goal of the work is investigation of the impact of transported fuel fluctuations on the stability of the refueling vehicle during the emergency braking and introducing of methods for selecting values of variable parameters of the electronic brake force distribution system to minimize it. Conclusion. Considering the oscillations of the free surface of the liquid in the mathematical model of disturbed movement of a closed system of stability significantly reduces the stability area of the system in the low frequency range due to the loop, the size and position of which depend on the filling level of the tank. Need to choose an envelope loop that according to different levels of tank filling.

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Parametric synthesis of the electronic control unit of the course stability system of the car

Cited by 8 publications

References 6 publications

Simulation of Random External Disturbance Acting on the Car Body in the Urgent Braking Mode

Simulation of Random External Disturbance Acting on the Car Body in the Urgent Braking Mode

Parametric Synthesis of the Invariant System of Car Course Stability

About Stability of the Movement of the Refueling Vehicle Equiped With Digital System of Brake Forces Distribution During the Emergency Braking

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