# x-engineer.org

Engineering tutorials

*09/01/2023*

https://x-engineer.org/proportional-controller/

Proportional (P) controller – x-engineer.org A technical article about proportional controllers provides detailed information about how these controllers work, their equations and practical examples, as well as their advantages and disadvantages.

*07/12/2022*

ACTIVE vs. REACTIVE POWER

Do you know the difference between active and reactive power? You will after reading this article!

https://x-engineer.org/active-vs-reactive-power/

*29/03/2022*

https://x-engineer.org/road-slope-gradient-force/

How to calculate road slope (gradient) force – x-engineer.org Tutorial on how to calculate road slope force and power with hands-on example and on-line calculator.

*24/03/2022*

https://x-engineer.org/aerodynamic-drag/

How to calculate aerodynamic drag force – x-engineer.org Tutorial on how to calculate aerodynamic drag resistance force and power with hands-on example and on-line calculator.

*22/03/2022*

https://x-engineer.org/rolling-resistance/

How to calculate rolling resistance – x-engineer.org Tutorial on how to calculate rolling resistance coefficient and force with hands-on example and on-line calculator.

*14/03/2022*

How to calculate wheel curb climbing torque – x-engineer.org Tutorial on how to calculate the climbing wheel force and torque for pushed and traction wheel, with detailed explanations, hands-on examples and online calculator

*05/12/2021*

https://x-engineer.org/torque-converter-clutch/

Torque converter clutch: how it works, why we need it and how to diagnose problems

*08/11/2021*

How to calculate (determine) the gear ratio of the final drive (differential) – x-engineer.org Tutorial on how to calculate (determine) the gear ratio for the final drive (differential) of a vehicle powered by an internal combustion engine or for an electric vehicles with step by step calculation equation and hands-on examples (with online gear ratio calculator)

*25/10/2021*

Discretizing a transfer function from s-domain (continuous) to z-domain (discrete) – x-engineer.org Tutorial on how to convert a continuous (s-domain) transfer function into a discrete (z-domain) transfer function using forward Euler approximation, backward Euler approximation or Tustin/trapezoidal approximation with Xcos block diagram implementation

*28/09/2021*

Automation of Xcos models using Scilab – x-engineer.org Tutorial on running Xcos model from Scilab script and Xcos model test automation

*22/09/2021*

Bilinear (2-D) interpolation with algorithm and calculator – x-engineer.org Tutorial about bilinear (2-D) interpolation with mathematical description, hands on example, Scilab script and online calculator

*14/09/2021*

How a boost DC-DC converter works – x-engineer.org Tutorial on the operating modes of a boost DC-DC converter with explicit description of the governing equations and idealized waveforms

*13/07/2021*

https://x-engineer.org/automotive-engineering/vehicle/electric-vehicles/what-is-a-dc-dc-converter/

What is a DC-DC converter ? – x-engineer.org Introduction into the working principle of DC-DC converters (buck DC-DC converter, boost DC-DC converter, buck-boost DC-DC converter

*08/07/2021*

Do you know what a low pass filter is ?

A detailed introduction of a low pass filter with calculation examples and Scilab/Xcos simulations:

https://x-engineer.org/graduate-engineering/signals-systems/signal-processing/what-is-a-low-pass-filter-used-for/

Improve your understanding of low pass filters using the online calculator/simulator:

https://low-pass-filter.x-engineer.org/

What is a low pass filter used for ? – x-engineer.org Low pass filter tutorial with mathematical equations, hand calculated examples and Scilab/Xcos simulations

*08/01/2021*

https://how-to-calculate-energy.com/

Physics tutorials on energy topics. Most interesting articles to come!

How to calculate energy Tutorial on how to calculate different types of energy, with practical examples and on-line calculator

*23/11/2020*

https://x-engineer.org/undergraduate-engineering/mathematics/algebra/algebra-cheat-sheet/

Algebra Cheat Sheet – x-engineer.org Algebra cheat sheet for Arithmetic Operations, Exponent Properties, Properties of Radicals, Properties of Inequalities, Properties of Absolute Value, Distance Formula, Complex Numbers, Logarithms and Log Properties, Factoring Formulas, Quadratic Formula, Square Root Property, Absolute Value Equation...

*25/09/2020*

https://x-engineer.org/projects/vehicle-acceleration-performance-online-calculator/

Online calculator for vehicle performance. Input your vehicle data and visualize results!

See the influence of full load torque, gearbox ratio, vehicle mass, aerodynamic drag on maximum speed and acceleration.

Vehicle acceleration and performance online calculator – x-engineer.org Online vehicle acceleration and performance calculator (simulator) with flexible parameters input

*18/09/2020*

How to calculate wheel and vehicle speed from engine speed – x-engineer.org Tutorial on how to calculate vehicle speed function of the engine (motor) speed and the engaged gear (on-line calculator)

*17/09/2020*

How to calculate the centroid of an area – x-engineer.org Tutorial and online calculator for centroid calculation for an area defined by data points

*10/09/2020*

Random password generator with algorithm – x-engineer.org Random password generator with Scilab coding example and in-page generator

*03/09/2020*

https://x-engineer.org/projects/modeling-simulation-automotive-suspension/

Modeling and simulation of an automotive suspension

*16/07/2020*

https://x-engineer.org/automotive-engineering/internal-combustion-engines/ice-components-systems/how-a-mechanical-centrifugal-supercharger-works/

How a mechanical centrifugal supercharger works

*08/07/2020*

https://x-engineer.org/automotive-engineering/vehicle/hybrid/types-hybrid-electric-vehicles-hev/

Types of Hybrid Electric Vehicles (HEV)

*02/07/2020*

https://x-engineer.org/automotive-engineering/vehicle/hybrid/what-is-a-hybrid-electric-vehicle-hev/

What is a Hybrid Electric Vehicle (HEV) ?

*21/06/2020*

https://x-engineer.org/automotive-engineering/chassis/vehicle-dynamics/tire-model-for-longitudinal-forces/

Tire model for longitudinal forces

*16/06/2020*

https://x-engineer.org/undergraduate-engineering/physics/solid-mechanics/how-to-calculate-friction-force/

How to calculate friction force

*01/06/2020*

Modeling and simulation of a vehicle with automatic transmission

https://x-engineer.org/projects/modeling-simulation-vehicle-automatic-transmission/

*11/05/2020*

https://x-engineer.org/graduate-engineering/cad-cae/xcos/how-to-integrate-c-code-in-xcos/

How to integrate C code in Xcos – x-engineer.org Tutorial on how to integrate and simulate C code in a Xcos block diagram

*01/05/2020*

Quarter car suspension model transfer function – x-engineer.org How to find the transfer function of a quarter-car suspension model with Scilab and Xcos modelling and simulation

*18/04/2020*

Mathematical models and simulation of electrical systems – x-engineer.org Mathematical modeling with differential equations, transfer functions and state-space models and simulation in Scilab and Xcos of various electric circuits: RL, RC, RLC