update introduction doc (#1151)

docs/modules/1_introduction/1_definition_of_robotics/definition_of_robotics_main.rst

@@ -1,14 +1,77 @@
 Definition of Robotics
 ----------------------
 
-In recent years, autonomous navigation technologies have received huge
-attention in many fields.
-Such fields include, autonomous driving[22], drone flight navigation,
-and other transportation systems.
+What is Robotics?
+^^^^^^^^^^^^^^^^^^
 
-Examples of Python in Robotics:
+Robot is a machine that can perform tasks automatically or semi-autonomously.
+Robotics is the study of robots.
+The field of robotics has wide areas of technologies such as mechanical engineering,
+electrical engineering, computer science, and artificial intelligence (AI),
+to create machines that can perform tasks autonomously or semi-autonomously.
+
+The History of Robots
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+This timeline highlights key milestones in the history of robotics:
+
+Ancient and Early Concepts (Before 1500s)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The idea of **automated machines** has existed for thousands of years. Ancient civilizations imagined mechanical beings:
+
+- **Ancient Greece (4th Century BC)** – Greek engineer **Hero of Alexandria** designed early **automata** (self-operating machines) powered by water or air.
+- **Chinese and Arabic Automata (9th–13th Century)** – Inventors like **Al-Jazari** created intricate mechanical devices, including water clocks and humanoid robots.
+
+The Birth of Modern Robotics (1500s–1800s)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- **Leonardo da Vinci’s Robot (1495)** – Designed a humanoid knight with mechanical movement.
+- **Jacques de Vaucanson’s Automata (1738)** – Created robotic figures like a mechanical duck that could "eat" and "digest."
+- **Industrial Revolution (18th–19th Century)** – Machines began replacing human labor in factories, setting the foundation for automation.
+
+The Rise of Industrial Robots (1900s–1950s)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- **The Term “Robot” (1921)** – Czech writer **Karel Čapek** introduced the word *“robot”* in his play *R.U.R. (Rossum’s Universal Robots)*.
+- **Early Cybernetics (1940s–1950s)** – Scientists like **Norbert Wiener** developed theories of self-regulating machines, influencing modern robotics.
+
+The Birth of Modern Robotics (1950s–1980s)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- **First Industrial Robot (1961)** – *Unimate*, created by **George Devol and Joseph Engelberger**, was the first programmable robot used in a factory.
+- **Rise of AI & Autonomous Robots (1970s–1980s)** – Researchers developed mobile robots like **Shakey** (Stanford, 1966) and AI-based control systems.
+
+Advanced Robotics and AI Integration (1990s–Present)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- **Autonomous Vehicles & Drones** – Self-driving cars and UAVs (unmanned aerial vehicles) became more advanced.
+- **Medical Robotics** – Robots like **da Vinci Surgical System** revolutionized healthcare.
+- **Personal Robots** – Devices like **Roomba** (vacuum robot) and **Sophia** (AI humanoid) became popular.
+- **Collaborative Robots (Cobots)** – Robots started working alongside humans in industries.
+
+Key Components of Robotics
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Robotics consists of several essential components:
+
+#. Sensors – Gather information from the environment (e.g., cameras, LiDAR, gyro, accelerometer, wheel encoders).
+#. Actuators – Enable movement and interaction with the world (e.g., motors, hydraulic systems).
+#. Computers – Process sensor data and make decisions (e.g., micro-controllers, CPUs, GPUs).
+#. Power Supply – Provides energy to run the robot (e.g., batteries, solar power).
+#. Software & Algorithms – Allow the robot to function and make intelligent decisions (e.g., ROS, machine learning models, localization, mapping, path planning, control).
+
+This project, PythonRobotics, focuses on the software and algorithms part of robotics.
+
+Applications of Robots
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Robots come in various forms depending on their purpose:
+
+#. 🤖 Industrial Robots – Used in manufacturing (e.g., robotic arms in manufacturing factories).
+#. 🏠 Service Robots – Assist in daily life (e.g., vacuum robots, delivery robots).
+#. 🚗 Autonomous Vehicles – Self-driving cars and drones.
+#. 👨‍⚕️ Medical Robots – Assist in surgeries and healthcare.
+#. 🚀 Space & Exploration Robots – Used for planetary exploration (e.g., NASA’s Mars rovers).
+#. 🐶 Humanoid & Social Robots – Designed to interact with humans (e.g., ASIMO, Sophia).
 
-Autonomous Navigation: Python is used in self-driving cars and other autonomous vehicles for tasks like perception, localization, and path planning.
-Industrial Robotics: Python is employed in manufacturing for robot control, quality inspection, and automation.
-Service Robotics: Python powers robots that perform tasks like cleaning, delivery, and customer service in various environments.
-Research and Education: Python is a popular choice in robotics research and education due to its ease of use and versatility.

docs/modules/1_introduction/2_python_for_robotics/python_for_robotics_main.rst

@@ -4,7 +4,7 @@ Python for Robotics
 A programing language, Python is used for this `PythonRobotics` project
 to achieve the purposes of this project described in the :ref:`What is PythonRobotics?`.
 
-This section explains the Python itself and features for science computing Robotics.
+This section explains the Python itself and features for science computing and robotics.
 
 Python for general-purpose programming
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

docs/modules/1_introduction/3_technology_for_robotics/technology_for_robotics_main.rst

@@ -1,6 +1,15 @@
 Technology for Robotics
 -------------------------
 
+
+Autonomous Navigation
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+In recent years, autonomous navigation technologies have received huge
+attention in many fields.
+Such fields include, autonomous driving[22], drone flight navigation,
+and other transportation systems.
+
 An autonomous navigation system is a system that can move to a goal over long
 periods of time without any external control by an operator.
 The system requires a wide range of technologies: