# Industrial control

:::{topic} Learning goals
- evaluate a solution for an industrial control problem and explain the relevance of programmable systems for these problems
:::

## Problem
:::{commons-figure} https://commons.wikimedia.org/wiki/File:Astronaut_Charles_Conrad_-_Cockpit_-_Lunar_Landing_Training_Vehicle_-_Ellington_AFB_(EAFB),_TX_(S69-56058).jpg
:height: 700px
25 Oct. 1969 - Commander of the Apollo 12 lunar landing mission, sits in the cockpit of a Lunar Landing Training Vehicle (LLTV) during a lunar simulation flight at Ellington Air Force Base.
:::

## Various control systems

### Mechanical ⚙️

:::{commons-figure} https://commons.wikimedia.org/wiki/File:Steam_engine_in_action_%28two-thirds_speed%29.gif
Steam engine using a centrifugal governor
:::

### Electronic 💻

:::{commons-figure} https://commons.wikimedia.org/wiki/File:Arduino_ftdi_chip-1.jpg
:width: 600
A chip on an Arduino board
:::

### Manual 🤹🏼

:::{commons-figure} https://commons.wikimedia.org/wiki/File:Hands_on_wheel.jpg
Human hands on a car steering wheel
:::

:::{list-table} Comparison of three control methods
:header-rows: 1
:width: 400px

* - Type
  - Pro 👍
  - Con 👎
* - Mechanical ⚙️
  - simple, reliable
  - bulky, complex systems not feasible
* - Electronic 💻
  - flexibility through programmability (computers), small
  - complex, reliability
* - Manual 🤹
  - very flexible, can cope with an unknown environment
  - costly, unreliable for repetitive tasks
:::

Regardless of the method, we use typically electrical wires and electronics to connect all systems together.

:::{activity}
As an engineer in the R&D department of the space agency you are designing the following subsystems of a lunar lander:

1. a sensor for pointing the antenna to the world 📡
1. subsystem for traveling from space to moon's proximity 
1. subsystem for landing on the moon 🛬

For these scenarios:
1. *pick* one control method
2. *explain* with an example how electronics (and computers) can help in this scenario

Steps:
1. 2 min Individual work
1. 2 min Discuss with your partner
1. 1 min Write down your result and keywords so that you can explain that later
1. We will discuss one solution together
:::

From now on we assume that we use a programmable electronic system to solve our problem.