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所在平台: Udemy |
课程主页: https://www.udemy.com/course/fundamental-concepts-of-vehicle-dynamics/
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Coursera 上的《汽车工程：车辆动力学入门》课程概述 本课程旨在为初学者提供关于车辆动力学的基础知识，重点关注车辆在运动中的行为。课程内容涵盖了从基础的汽车工程原理和牛顿物理定律，到车辆与道路之间的相互作用，以及车辆在加速、制动、转弯和应对振动时的反应机制。 **核心学习内容包括：** * **车辆动力学基础：** 讲解车辆动力学的基本概念、控制车辆运动的物理定律、自由度、坐标系（包括地面固定坐标系）以及重心（CG）的重要性。 * **载荷分析：** 介绍车辆面临的各种载荷情况，并指导如何绘制自由体图。 * **轮胎与载荷生成：** 解释轮胎的工作原理以及如何产生载荷。 * **悬架设计：** 深入探讨悬架设计的概念、过程、功能，以及悬架几何设计、车轮和转向角度、悬架行程。 * **悬架特性：** 解释防倾杆（Anti-roll bar）、侧倾中心（Roll center）、外倾角变化率（Camber change rates）以及弹性动力学（Elastokinematics）等概念。 * **纵向动力学：** 详细阐述制动和加速时牵引力/制动力的产生机制。 * **横向动力学：** 深入分析车辆的转向不足（Understeer）和转向过度（Oversteer）现象，包括自行车模型（Bicycle Model）的推导，并从数学上定义这些条件。此外，还包含侧倾刚度（Roll stiffness）和侧倾分析（Lateral load transfer）。 * **振动隔离基础：** 讲解振动隔离的基本原理，包括弹簧（Springing）和阻尼（Damping）的作用，阻尼系数（Damping coefficient）、阻尼比（Damping ratio），以及振动系统的运动方程（Equation of motion）和阻尼特性。 * **侧倾控制与翻车：** 探讨使用弹簧进行侧倾控制（Roll control using springs）的原理，以及车辆翻车（Roll Over of Vehicles）的原因和控制方法。 **课程特点：** * **时长与更新：** 课程更新于 2019 年 11 月，包含 2+ 小时的内容，共 30 个讲座，并新增了特定主题。 * **易于理解：** 课程侧重于概念讲解，数学推导虽然有提及（如力矩传递方程、自行车模型推导），但整体而言并非数学密集型课程，不深入探讨数值处理，旨在清晰地解释基本原理。 * **适合人群：** 非常适合汽车工程领域的初学者，以及希望巩固基础概念的行业人士。具备基础数学和物理背景的学习者将能更好地理解车辆力学。 * **知识体系：** 课程从基础建立，逐步深入，帮助学习者理解“如何”和“为什么”车辆会产生特定的动力学行为。 总而言之，本课程为希望入门车辆动力学领域的学习者提供了一个全面且易于理解的学习平台，能够帮助他们掌握一系列与车辆运动性能和舒适性相关的核心概念。
*****************************************************************Course Updated on 11/2019 with 2 + hours of content and 30 lecturesTopics which have been addedEarth Fixed coordinate system , Vehicle attitude and Euler anglesDynamic force analysis of a vehicle and derivation of equation for tractive and braking forceDerivation of Torque transfer equation relating the torque developed by engine to the final Tractive force at the Tire through mathematical derivation.Bicycle Model Derivation for defining Understeer and Oversteer condition mathematically with step by step explanationsRoll stiffness derivation in terms of spring stiffness.Roll analysis - Lateral load transfer with Force balance equation**************************************************************************Vehicle dynamics is the study of behavior of vehicles in motion. The study is one of the most important activities in the Vehicle design and development cycle to design vehicles which drive well and are comfortable to ride in.In this course, you will learn the Concepts and mechanisms which govern the actions and reactions in vehicles all the way from how vehicles accelerate, brake, turn and respond to vibrations.The Theory and concepts behind suspension design process including concepts of kinematics and vibration isolation.This course will first build on the very basics of automotive engineering and Newtons laws of physics , friction etc and then move on to explain the phenomena taking place between the Vehicle and the road in different circumstances. At each section of the course you will be taking away insightful concepts with the understanding of How? and Why?The course is filled with 5+ hours of conceptual learning which lays a strong foundation to understand the more advanced concepts of vehicle dynamics and suspension design.This is not a mathematically intensive course and it doesn't aim to delve deep into the numerical treatment of dynamics rather aims to explain the underlying principles and concepts which are at play to govern the behavior of the vehicles.You might have come across terms like roll, under-steer, camber ,caster and many more but don't really know what they mean and how important they are for the vehicle. This course will clear out those concepts.Concepts coveredThe Basis of vehicle dynamics and Basic laws of physics which govern dynamicsConcept of degrees of freedom, axis systems and importance of center of gravityTypes of Loading scenarios faced by the Vehicle and their free body diagrams.The basics on the Tire and mechanism of Load generationThe Suspension Design process - How is it done progressively and the function of suspensions.In-depth look at Suspension geometry design Wheel and steering anglesSuspension travelAnti-featuresRoll centerCamber change ratesElastokinematicsLongitudinal dynamics - Explanation of the mechanism of Traction force generation in Braking and accelerating and explanation of working of Anti-lock brake systemsLateral dynamics- Understeer, Oversteer behavior of vehicle and root cause for that behavior in turning.Fundamentals of Vibration isolationWhat is springing and dampingWhat is damping co efficient , damping ratioEquation of motion of a generic vibration systemDamping characteristicsWhy Under-damping?What is Motion Ratio?Roll control using springs?Roll Over of VehiclesThe reasonHow it can be controlledIf you are a beginner to the field and want to learn the concepts in an easy way , this course is for you.If you are already into the field of vehicle dynamics , this course will serve as a reference to clear out concepts on basic aspects of vehicle dynamics. The course contains hardly any math or high level physics concepts. If you are having a basic background in Math and physics , this course will help you understand Vehicle Mechanics at Entry level.
