欢迎来到机器人世界 | Welcome to the World of Robots

你有没有想过，当你早上醒来，揉揉眼睛准备迎接新的一天时，其实在你的身边已经有许多“特别的朋友”在默默工作了？它们有的在厨房里帮妈妈打扫地面，有的在工厂里忙碌地组装汽车，还有的在医院的手术室里帮助医生完成精密的手术。这些“特别的朋友”有一个共同的名字——机器人（Robot）。

Have you ever wondered what happens while you're sleeping? When you wake up in the morning and stretch, there are actually many "special friends" already working hard around you! Some are sweeping the kitchen floor for mom, others are assembling cars in factories, and some are even helping doctors perform precise surgeries. These "special friends" all have a special name — Robots!

你可能会想，机器人一定长得像人吧？有的机器人确实有头、有手、有脚，看起来像科幻电影里的超级英雄。但更多的机器人看起来完全不像人类！扫地机器人圆圆的，像一个大扁盘子；工厂里的机械臂长长的，有好几个关节，像一只巨大的金属手臂；还有一些机器人小到肉眼几乎看不见，需要用显微镜才能看到。不管机器人长什么样子，它们的本质是一样的——它们都是能够自动完成任务的机器，而且能够感知周围的世界，像我们的大脑一样“思考”和“做决定”。

You might think robots look like humans, right? Some robots do have heads, arms, and legs, looking like superheroes from sci-fi movies. But many robots look nothing like humans at all! Robot vacuum cleaners are round and flat, like big discs; factory robot arms are long with multiple joints, like giant metal arms; and some robots are so tiny you need a microscope to see them. No matter what shape robots take, they all share the same essence — they are machines that can perform tasks automatically, sense the world around them, and "think" and "make decisions" like our brains do.

在本章中，我们将一起踏上机器人世界的探索之旅。我们会认识各种各样的机器人，了解它们是如何工作的，特别要记住机器人学的三大支柱——感知（Perception）、规划（Planning）和控制（Control）。这三大支柱就像机器人身体里的“三剑客”，缺一不可，共同让机器人变得聪明又能干！

In this chapter, we'll embark on an adventure into the world of robots. We'll meet various types of robots and learn how they work. Most importantly, we'll discover the three pillars of robotics — Perception, Planning, and Control. These three pillars are like "three heroes" inside a robot's body — each one is essential, and together they make robots smart and capable!

什么是机器人？ | What Is a Robot?

让我们先来回答一个最基本的问题：机器人到底是什么？

Let's start with the most fundamental question: What exactly is a robot?

机器人是一种特殊的机器，它能够自动执行任务，并且能够感知周围环境，根据环境的变化做出相应的反应。简单来说，机器人就是有“眼睛”可以看、有“脑子”可以思考、有“手脚”可以行动的机器。

A robot is a special kind of machine that can perform tasks automatically and sense its environment, responding to changes around it. Simply put, a robot is a machine with "eyes" to see, a "brain" to think, and "hands and feet" to act.

你可能会说，这个定义听起来和普通的机器差不多啊！电视、冰箱、洗衣机也是机器，它们能帮你做事，但它们不是机器人。这是为什么呢？

You might say, "That sounds similar to regular machines! TVs, refrigerators, and washing machines are also machines that help us, but they're not robots. Why not?"

关键的区别在于自主性（Autonomy）。普通机器需要你一步一步地告诉它该做什么——按哪个按钮、调到什么模式。但机器人不一样！它可以自己“思考”，根据看到的情况决定下一步该怎么做。就像你一样，早上起床后不用别人告诉你“该睁眼了”“该穿衣服了”，你自己会根据需要做出判断和行动。机器人也是如此，它有“眼睛”看世界，有“大脑”做判断，有“身体”去行动。

The key difference is autonomy. Regular machines need you to tell them exactly what to do step by step — which button to press, which mode to set. But robots are different! They can "think" for themselves and decide what to do next based on what they see. Just like you! When you wake up in the morning, you don't need someone to tell you "open your eyes now" or "put on your clothes." You make decisions and act based on the situation. Robots work the same way — they have "eyes" to see the world, a "brain" to make decisions, and a "body" to take action.

让我们用更专业的语言来定义机器人：机器人是一种能够感知（Sense）、规划（Plan）和控制（Act）的自动化机器。 这三个词——感知、规划、控制——就是机器人学的三大核心概念，我们将贯穿全书不断提到它们。

Let's define robots in more technical terms: A robot is an automated machine capable of sensing, planning, and acting. These three words — sensing, planning, and acting — are the three core concepts of robotics, and we'll encounter them again and again throughout this book.

机器人的“身体”和“大脑” | A Robot's "Body" and "Brain"

一个完整的机器人就像一个超级英雄，有自己的“超能力装备”。我们可以把机器人的组成部分想象成一个超级英雄联盟：

A complete robot is like a superhero with its own "superpower equipment." Let's imagine the parts of a robot as a superhero team:

1. 感知系统（Perception System）——机器人的“眼睛”和“耳朵”

机器人的感知系统就像我们的眼睛、耳朵、鼻子和皮肤。它包括各种传感器（Sensors），让机器人能够“看到”周围的东西、“听到”声音、“感觉到”温度和压力。

The robot's perception system is like our eyes, ears, nose, and skin. It includes various sensors that let robots "see" objects around them, "hear" sounds, and "feel" temperature and pressure.

```mermaid graph LR A[传感器<br/>Sensors] --> B[视觉传感器<br/>Camera] A --> C[声音传感器<br/>Microphone] A --> D[触觉传感器<br/>Touch Sensor] A --> E[距离传感器<br/>Distance Sensor] ```

2. 控制系统（Control System）——机器人的“神经系统”

控制系统就像我们的大脑和神经系统。它接收感知系统传来的信息，处理这些信息，然后发出指令让机器人的各个部件工作。

The control system is like a robot's brain and nervous system. It receives information from the perception system, processes this information, and then sends commands to make the robot's parts work.

3. 执行系统（Actuation System）——机器人的“手脚”

执行系统包括电机（Motors）、液压装置和气动装置，它们让机器人的轮子转动、机械臂弯曲、手指抓取物体。

The actuation system includes motors, hydraulic devices, and pneumatic devices that make a robot's wheels turn, arms bend, and fingers grab objects.

```mermaid graph TD A[感知系统<br/>检测环境] --> B[控制系统<br/>处理信息] B --> C[执行系统<br/>采取行动] C --> A ```

机器人的五个关键特征 | Five Key Characteristics of Robots

科学家和工程师们经过长期研究，总结出了机器人的五个关键特征。记住这五个特征，你就能轻松判断一个机器是不是机器人了：

After long research, scientists and engineers have identified five key characteristics of robots. Remember these five, and you'll be able to easily tell whether a machine is a robot:

1. 感知（Sense）——能够感知环境，获取信息 2. 规划（Plan）——能够思考，决定下一步做什么 3. 控制（Act）——能够执行动作，改变世界 4. 自主性（Autonomy）——能够独立工作，不需要人一直盯着 5. 编程性（Programmability）——能够根据不同的程序做不同的事

1. Sense — Ability to perceive the environment and acquire information 2. Plan — Ability to think and decide what to do next 3. Act — Ability to perform actions and change the world 4. Autonomy — Ability to work independently without constant human supervision 5. Programmability — Ability to perform different tasks based on different programs

一个东西如果同时满足这五个特征，那它就是机器人！如果只有其中几个，那可能就是一个普通的机器或者工具。

If something meets all five of these characteristics, it's a robot! If it only has a few, it might just be a regular machine or tool.

走进机器人的多彩世界 | Exploring the Colorful World of Robots

机器人的世界比你想象的要精彩得多！从你家里的客厅到浩瀚的外太空，到处都有机器人忙碌的身影。让我们一起去看看吧！

The world of robots is far more wonderful than you might imagine! From your living room to outer space, robots are busy working everywhere. Let's explore together!

🏠 服务机器人（Service Robots）——生活中的好帮手

服务机器人是离我们生活最近的机器人类型。它们在人们的日常生活和工作中提供服务，帮助我们完成各种任务。

Service robots are the type closest to our daily lives. They provide services in our daily lives and work, helping us complete various tasks.

扫地机器人（Robot Vacuum Cleaners）

你家里有没有一个圆圆的、扁扁的、会自己在地上跑来跑去的小家伙？没错，那就是扫地机器人！它是服务机器人中最常见的一种。

Do you have a round, flat little device at home that moves around on the floor by itself? That's a robot vacuum cleaner! It's one of the most common types of service robots.

扫地机器人是怎么工作的呢？它有一个秘密武器——激光雷达（Lidar）。激光雷达就像一双神奇的眼睛，它会向四周发射看不见的激光束，然后测量激光反弹回来需要的时间，这样就能“看到”房间里的墙壁、家具和障碍物在哪里。扫地机器人用这个信息绘制一张“地图”，然后聪明地规划出一条打扫路线，把每个角落都打扫干净！

How does a robot vacuum cleaner work? It has a secret weapon — Lidar (Light Detection and Ranging). Lidar is like magical eyes that shoot invisible laser beams in all directions, then measures how long it takes for the laser to bounce back. This way, it can "see" where the walls, furniture, and obstacles are. The robot vacuum uses this information to draw a "map" of the room, then cleverly plans a cleaning route to clean every corner!

```mermaid graph TD A[启动] --> B[激光雷达扫描<br/>Lidar Scanning] B --> C[构建房间地图<br/>Build Room Map] C --> D[规划清扫路线<br/>Plan Cleaning Path] D --> E[开始清扫<br/>Start Cleaning] E --> F[遇到障碍物] F --> G{重新规划路线<br/>Replan Route} G --> D E --> H[清扫完成<br/>返回充电座] ```

送餐机器人（Food Delivery Robots）

你有没有在餐厅里见过一个矮矮的、圆头圆脑的机器人端着盘子走来走去？它会自己避开走来走去的人，把美食送到客人面前，好神奇啊！

Have you seen a short, round robot carrying plates around in a restaurant? It can avoid people walking by itself and deliver d