Calcul of Vehicle steering angle

Hello every one,

I work on a project of simulator of autonomous vehicle, and I would model the vehicle steering system wich was based on an hydraulic circuit. So, i'am asking for the relationship between the Speed RPM (thermal motor), Pressure pump (hydraulic pump) and the vehicle sterring angle (wheels rotation).

Any help please

[Sam Chak]

Hi Mouna,

If you want calculate the steering angle of the vehicle, you must provide vehicle dynamics and relevant equations that allow the steering angle to be computed to satisfy some kind of performances.

Why do you want to steer the vehicle? I'm imagining, steering the wheels alone does not make my vehicle moves. I think 🤔 you must be missing something critical. Please check

[Mouna SAMAALI]

Hello sam,

I don't have the vehicle dynamics and equations but the only information that provide for me is : the value of speed RPM, pump pressure, pump cylinder. I'am looking for the equation that connects these parameters to the angle of wheel rotation. Knowing that the transmission of the signt start by the thermal moteur connected a hydraulic pump. The pump will provide the pressure to a PVG valve group. the signal command provied by the PVG system will rotate the wheels vehicle.

only this working principale is provided for me.

thank you in advance

[Sam Chak]

If you are an Engineer, then you should have a team in the Engineering Department to support you and share the technical knowledge of the vehicle dynamics with you.

Guess your Boss throws the dataset to you and tells you identify the vehicle system so that you can mathematically design a governing law to steer the wheels.

[Mouna SAMAALI]

I'am an mechatronics engineer. The vehicles of my company are specific and complex systems. they have not mathematically behaviours as a regular vehicle. that is I'am posted my question in the ask bloc mathworks.

Answer 1

[Sam Chak]

Hi Mouna

The examples in this toolbox will be helpful

System Identification Toolbox

Else, get the standard vehicle dynamics related to your application and perform curve fitting to estimate the values of the parameters.

[Mouna SAMAALI]

thank you veru maych for your help, i will consult this toolbox and find how can i adapt it for my campany vehicle.

[Sam Chak]

You are welcome, @Mouna SAMAALI. If you find the introduction to the System Identification Toolbox is helpful, please consider accepting ✔ and voting 👍 the Answer as a closure.

Take some time to explore the System Identification and Curve Fitting toolboxes. When you have the estimated system for the vehicle dynamics, come back here if you have issue with determination of the Steering Angle.