MATLAB: How to define a variable input in a simulink model

variable input simulink virtual car model

I made a model that simulates a car's position with speed and steering angle as input. So far I have used a constant steering angle but now I want to simulate a track. So I need a variable steering angle as a function of time as an input.

Does someone have any idea about this?

Thanks

Best Answer

hi, you can use clock as an input of embedded matlab function and generate varible in function as you wish

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MATLAB: Defining inputs for subfunctions

function [ output_args ] = Untitled2( input_args )
    speed = 6;
    function [f_value]=f(x)
      f_value=0.5.*speed.*x;
    end
    function [g_value]=g(x)
      g_value=(x.^2)./speed;
    end
    x=0:0.01:5;
    plot(f(x),x,g(x),x)
  end

MATLAB: Documentation: No road grade angles in model equations

Hi Jiri - Thank you for your careful review of the documentation! I'm the technical writer for the Powertrain Blockset and Vehicle Dynamics Blockset documentation.

Looks like you're using the Vehicle Dynamics Blockset.

Hope this response helps:

Vehicle body 3DOF - Block models longitudinal, lateral, and yaw motion. As of now, the block does not include considerations for road incline and/or bank angles. We could incorporate the incline and bank angles in the future, but we need to work with users to decide how to specify them. For example, should the block model instantaneous loads or a global road profile? The distinction is important as we'd need to account for the reaction loads while the vehicle is traversing up the side of a hill at a lateral angle and could potentially roll over.

Vehicle body 6DOF - Block models translational (3DOF) and rotational (3DOF) motion. The block implicity accounts for road incline via the gravity vector. I will take the 'road grade angle' entry out of the variable list in the documentation; I can see why that might be confusing.

Vehicle body 3DOF Longitudinal - Block does account for road incline. I will consider enhancing the documentation to include the specific road incline equations.

Thank you!

Chris Erkkinen

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MATLAB: Defining inputs for subfunctions

MATLAB: Documentation: No road grade angles in model equations

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