diff options
Diffstat (limited to 'wiki/engineering')
| -rw-r--r-- | wiki/engineering/aerospace/designing-aircraft.org | 16 | ||||
| -rw-r--r-- | wiki/engineering/aerospace/protocols/ARINC-429.org | 18 | ||||
| -rw-r--r-- | wiki/engineering/aerospace/protocols/CAN-bus.org | 18 | ||||
| -rw-r--r-- | wiki/engineering/aerospace/standards/ARP4754.org | 36 | ||||
| -rw-r--r-- | wiki/engineering/aerospace/standards/DO-160.org | 104 | ||||
| -rw-r--r-- | wiki/engineering/amplitude-shift-keying.org | 23 | ||||
| -rw-r--r-- | wiki/engineering/index.org | 15 | ||||
| -rw-r--r-- | wiki/engineering/lean-six-sigma.org | 15 | ||||
| -rw-r--r-- | wiki/engineering/morse-code.org | 64 | ||||
| -rw-r--r-- | wiki/engineering/qam-modulation.org | 70 | ||||
| -rw-r--r-- | wiki/engineering/v-model.org | 39 |
11 files changed, 418 insertions, 0 deletions
diff --git a/wiki/engineering/aerospace/designing-aircraft.org b/wiki/engineering/aerospace/designing-aircraft.org new file mode 100644 index 0000000..627322c --- /dev/null +++ b/wiki/engineering/aerospace/designing-aircraft.org @@ -0,0 +1,16 @@ +# -*- mode: org; -*- + +#+TITLE: Designing aircraft +#+SUBTITLE: How does one design an aircraft? +#+AUTHOR: Marius Peter +#+DATE: <2022-03-01 Tue> +#+EMAIL: mlnp@tuta.io + +#+DESCRIPTION: aircraft design tutorial. +#+KEYWORDS: aerospace design + + +#+begin_abstract +The DO-160 document is a standard for environmental testing for +airborne equipment published by the RTCA. +#+end_abstract diff --git a/wiki/engineering/aerospace/protocols/ARINC-429.org b/wiki/engineering/aerospace/protocols/ARINC-429.org new file mode 100644 index 0000000..220e27d --- /dev/null +++ b/wiki/engineering/aerospace/protocols/ARINC-429.org @@ -0,0 +1,18 @@ +# -*- mode: org; -*- + +#+TITLE: ARINC 429 +#+SUBTITLE: Mark33 Digital Information Transfer System (DITS) +#+AUTHOR: Marius Peter +#+DATE: <2022-03-25 Fri> +#+OPTIONS: toc:nil + +#+DESCRIPTION: The ARINC 429 avionics data bus. + +#+TOC: headlines 2 + + +#+begin_abstract +The =ARINC 429= technical standard defines the physical and electrical +interfaces of a two-wire data bus and a data protocol to support an +aircraft's avionics local area network. +#+end_abstract diff --git a/wiki/engineering/aerospace/protocols/CAN-bus.org b/wiki/engineering/aerospace/protocols/CAN-bus.org new file mode 100644 index 0000000..2abbd23 --- /dev/null +++ b/wiki/engineering/aerospace/protocols/CAN-bus.org @@ -0,0 +1,18 @@ +# -*- mode: org; -*- + +#+TITLE: CAN bus +#+SUBTITLE: A robust vehicle bus to enable hostless microcontroller communication. +#+AUTHOR: Marius Peter +#+DATE: <2022-03-25 Fri> +#+OPTIONS: toc:nil + +#+DESCRIPTION: CAN bus: a robust vehicle bus to enable hostless microcontroller communication. + +#+TOC: headlines 2 + + +#+begin_abstract +The CAN bus design solves several engineering challenges, namely how +to minimize copper usage in vehicle microcontroller communication +lines. +#+end_abstract diff --git a/wiki/engineering/aerospace/standards/ARP4754.org b/wiki/engineering/aerospace/standards/ARP4754.org new file mode 100644 index 0000000..fa7a5e1 --- /dev/null +++ b/wiki/engineering/aerospace/standards/ARP4754.org @@ -0,0 +1,36 @@ +# -*- mode: org; -*- + +#+TITLE: ARP4754 +#+SUBTITLE: Guidelines For Development Of Civil Aircraft and Systems. +#+AUTHOR: Marius Peter +#+DATE: <2022-02-11 Fri> +#+EMAIL: mlnp@tuta.io +#+OPTIONS: toc:nil + +#+KEYWORDS: aerospace, SAE, ARP 4754 + +#+TOC: headlines 2 + + +#+begin_abstract +ARP4754 is a guidance issued by SAE. +#+end_abstract + + +* Introduction + + https://www.sae.org/standards/content/arp4754a/ + + +* Main topics + +| § | Theme | Description | +|---+---------------------+-------------| +| 1 | Development | | +| 2 | Safety | | +| 3 | Requirements mgmt. | | +| 4 | Validation | | +| 5 | Verification | | +| 6 | Configuration mgmt. | | +| 7 | Process assurance | | +| 8 | Certification | | diff --git a/wiki/engineering/aerospace/standards/DO-160.org b/wiki/engineering/aerospace/standards/DO-160.org new file mode 100644 index 0000000..2e9f60f --- /dev/null +++ b/wiki/engineering/aerospace/standards/DO-160.org @@ -0,0 +1,104 @@ +# -*- mode: org; -*- + +#+TITLE: DO-160 +#+SUBTITLE: Environmental Conditions and Test Procedures for Airborne Equipment. +#+AUTHOR: Marius Peter +#+DATE: <2022-02-11 Fri> +#+EMAIL: mlnp@tuta.io + +#+DESCRIPTION: Environmental Conditions and Test Procedures for Airborne Equipment. +#+KEYWORDS: aerospace, rtca, DO-160 + + +#+begin_abstract +The DO-160 document is a standard for environmental testing for +airborne equipment published by the RTCA. +#+end_abstract + + +* Introduction + + https://do160.org/rtca-do-160g/ + + +* Equipment categories + +Equipments are categorized as a function of the environments to which +they are subjected during normal operation. + + +* Sections + +Sections 7 and 8 are aircraft dependent. + + +** List +:PROPERTIES: +:HTML_CONTAINER_CLASS: big-table +:END: + +#+NAME: sections +#+CAPTION: List of DO-160 section. +| § | Name | Concerns the effects of... | Parameters of interest | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 1 | /Introductory sections/ | /N/A/ | /N/A/ | +| 2 | | | | +| 3 | | | | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 4 | Temperature | Temperature on the system. | Temperature, condensation. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 4 | Altitude | Altitude & cabin depressurization on performance. | Dielectric strength, (rapidly) varying air pressure. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 5 | Temperature Variation | Extreme temperature changes. | Temperature delta, thermal expansion coefficients. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 6 | Humidity | High concentrations of humidity; ability to withstand moisture effects.[fn:1] | Hygrometry. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 7 | Shock & Crash safety | Mechanical shock. Ensures the item does not become a projectile in a crash. | Potential for projectile behavior. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 8 | Vibration | Vibrations. | Normal operation in all vibration scenarios. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 9 | Explosion proofness | Vacuum + gaseous mixture of combustibles. | The unit must be operable without igniting the environment. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 10 | Water proofness | Dripping water or pooled water. | Normal operation after exposure. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 11 | Fluids susceptibility | Various fluids including carbonated sugared beverages and cleaners/solvents. | Normal operation after exposure. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 12 | Sand & Dust | Blowing sand and dust of specific particle sizes. | Normal operation after exposure. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 13 | Fungus Resistance | Fungi under conditions favorable for their development.[fn:3] | Fungal proliferation. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 14 | Salt & Fog | Multiple exposures of salt fog and drying; environmentally accelerated corrosion. | Normal operation after exposure. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 15 | Magnetic effect | Magnetic effects on the aircraft's compass. | Normal aircraft compass function. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 16 | Power input | Input power emissions, susceptibility, transients, drop-outs, hold-up.[fn:2] | Voltage, current, phase. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 17 | Voltage spike | Voltage spikes caused by input power. | AC/DC voltage. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 18 | Audio Frequency Conducted Susceptibility | Frequency components during normal operation. | Power source harmonics. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 19 | Induced Signal Susceptibility | Induced voltages in the equipment interconnect circuit configuration. | power frequency harmonics; audio frequency signals, electrical transients. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 20 | RF emission and susceptibility | Normal operation on radio frequency emission energy and susceptibility. | | +| 21 | | | | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 22 | Lightning susceptibility | Direct and indirect effects, depending on location. | induced transients in the airframe or wire bundle. | +| 23 | | | | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 24 | Icing | Icing conditions arising from rapid changes in temperature, altitude and humidity. | Presence of ice. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 25 | ESD | ESD in handling and operation. | ESD. | +|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------| +| 26 | Flammability | Normal operation on presenting a fire hazard. | Normal operation not causing a fire. | + + +* Footnotes + +[fn:3] This includes high humidity, a warm atmosphere, and the +presence of inorganic salts. + +[fn:2] Full flight mission must be considered, from prior to the +engine start, to after landing---including emergencies. + +[fn:1] Moisture sensitive devices may experience issues with this test +and require conformal coat or other types of protection. diff --git a/wiki/engineering/amplitude-shift-keying.org b/wiki/engineering/amplitude-shift-keying.org new file mode 100644 index 0000000..464e1ea --- /dev/null +++ b/wiki/engineering/amplitude-shift-keying.org @@ -0,0 +1,23 @@ +# -*- mode: org; -*- + +#+TITLE: Amplitude-shift keying +#+SUBTITLE: A simple method for representing digital data. +#+AUTHOR: Marius Peter +#+DATE: <2022-04-05 Tue> + +#+DESCRIPTION: Amplitude-shift keying: a simple method for representing digital data. +#+MACRO: ASK amplitude-shift keying + + +#+begin_abstract +Amplitude-shift keying enables the representation of digital data as a +function of a carrier wave's amplitude. The earliest example of ASK +was the [[file:morse-code.org][Morse code]], implemented as an electrical switch the operator +could close to produce an audible tone for the listener at the other +end of the line. +#+end_abstract + + +\begin{equation} +e^{j\theta} = \cos(\theta) + j\sin(\theta) +\end{equation} diff --git a/wiki/engineering/index.org b/wiki/engineering/index.org new file mode 100644 index 0000000..fc4237d --- /dev/null +++ b/wiki/engineering/index.org @@ -0,0 +1,15 @@ +#+TITLE: Sitemap for project wiki---engineering + +- [[file:amplitude-shift-keying.org][Amplitude-shift keying]] +- [[file:lean-six-sigma.org][Lean/Six Sigma]] +- [[file:morse-code.org][Morse code]] +- [[file:qam-modulation.org][Quadrature Amplitude Modulation]] +- [[file:v-model.org][V-model]] +- aerospace + - [[file:aerospace/designing-aircraft.org][Designing aircraft]] + - protocols + - [[file:aerospace/protocols/ARINC-429.org][ARINC 429]] + - [[file:aerospace/protocols/CAN-bus.org][CAN bus]] + - standards + - [[file:aerospace/standards/ARP4754.org][ARP4754]] + - [[file:aerospace/standards/DO-160.org][DO-160]]
\ No newline at end of file diff --git a/wiki/engineering/lean-six-sigma.org b/wiki/engineering/lean-six-sigma.org new file mode 100644 index 0000000..dd00f21 --- /dev/null +++ b/wiki/engineering/lean-six-sigma.org @@ -0,0 +1,15 @@ +# -*- mode: org; -*- + +#+TITLE: Lean/Six Sigma +#+SUBTITLE: A modern approach to industrial quality management. +#+AUTHOR: Marius Peter +#+DATE: <2022-03-27 Sun> +#+EMAIL: mlnp@tuta.io + +#+DESCRIPTION: Lean Six Sigma: a modern approach to industrial quality management. + + +#+begin_abstract +Lean and Six Sigma methodologies were popularized a few years ago +thanks to... +#+end_abstract diff --git a/wiki/engineering/morse-code.org b/wiki/engineering/morse-code.org new file mode 100644 index 0000000..71cf077 --- /dev/null +++ b/wiki/engineering/morse-code.org @@ -0,0 +1,64 @@ +# -*- mode: org; -*- + +#+TITLE: Morse code +#+SUBTITLE: The longest-lived telecommunication coding system. +#+AUTHOR: Marius Peter +#+DATE: <2022-04-05 Tue> + +#+DESCRIPTION: Morse code: the longest-lived telecommunication coding system. + + +#+begin_abstract + +#+end_abstract + + +* International Morse code + +Rules: + +1. A dash should last for three dots. +2. The delay between: + 1. two symbols is one dot, + 2. two letters is three dots, + 3. two words is seven points. + +| Symbol | Coding | +|--------+---------| +| A | =·-= | +| B | =-···= | +| C | =-·-·= | +| D | =-··= | +| E | =·= | +| F | =··-·= | +| G | =--·= | +| H | =····= | +| I | =··= | +| J | =·---= | +| K | =-·-= | +| L | =·-··= | +| M | =--= | +| N | =-·= | +| O | =---= | +| P | =·--·= | +| Q | =--·-= | +| R | =·-·= | +| S | =···= | +| T | =-= | +| U | =··-= | +| V | =···-= | +| W | =·--= | +| X | =-··-= | +| Y | =-·--= | +| Z | =--··= | +|--------+---------| +| 1 | =·----= | +| 2 | =··---= | +| 3 | =···--= | +| 4 | =····-= | +| 5 | =·····= | +| 6 | =-····= | +| 7 | =--···= | +| 8 | =---··= | +| 9 | =----·= | +| 0 | =-----= | diff --git a/wiki/engineering/qam-modulation.org b/wiki/engineering/qam-modulation.org new file mode 100644 index 0000000..0a19036 --- /dev/null +++ b/wiki/engineering/qam-modulation.org @@ -0,0 +1,70 @@ +# -*- mode: org; -*- + +#+TITLE: Quadrature Amplitude Modulation +#+SUBTITLE: A method for digital modulation widely used in modern telecommunication. +#+AUTHOR: Marius Peter +#+DATE: <2022-03-31 Thu> + +#+DESCRIPTION: Quadrature Ampliture Modulation: a method for digital modulation widely used in modern telecommunication. +#+MACRO: QAM quadrature amplitude modulation + + +#+begin_abstract +Quadrature Amplitude Modulation is widely used. +#+end_abstract + + +* Complex numbers + +Euler equation forming the basis of {{{QAM}}}. + +#+NAME: euler +#+CAPTION: This is a caption. +\begin{equation} +e^{j\theta} = \cos(\theta) + j\sin(\theta) +\end{equation} + +Equation [[euler]] tells us that any complex phasor can be decomposed into +the sum of a cosine and sine component. + + +** Cosine---the in-phase component + +#+NAME: cosine +\begin{equation} +\cos(2\pi f_0 t) = \frac{e^{j2\pi f_0 t} + e^{-j2\pi f_0 t}}{2} += \frac{e^{j2\pi f_0 t}}{2} ++ \frac{e^{-j2\pi f_0 t}}{2} +\end{equation} + +We see that this equation features the following elements: + +| <r> | | +| \( -j2\pi f_0 t \) | Negative frequency | +| \( j2\pi f_0 t \) | Positive frequency | +| \( \frac{1}{2} \) | Component magnitude | + + +** Sine---the quadrature component + +#+NAME: sine +\begin{equation} +\sin(2\pi f_0 t) = \frac{e^{j2\pi f_0 t} - e^{-j2\pi f_0 t}}{2} += \frac{e^{j2\pi f_0 t}}{2} +- \frac{e^{-j2\pi f_0 t}}{2} +\end{equation} + + +* The constellation + + +#+begin_insight +QAM is based on imaginary numbers. +#+end_insight + + +| Real | Imaginary | +|------+-----------| +| 1 | i | +| 2 | -i | +| | | diff --git a/wiki/engineering/v-model.org b/wiki/engineering/v-model.org new file mode 100644 index 0000000..c7a7779 --- /dev/null +++ b/wiki/engineering/v-model.org @@ -0,0 +1,39 @@ +# -*- mode: org; -*- + +#+TITLE: V-model +#+SUBTITLE: A graphical representation of a system's development lifecycle. +#+AUTHOR: Marius Peter +#+DATE: <2022-02-11 Fri> +#+EMAIL: mlnp@tuta.io + +#+DESCRIPTION: The V-model: a graphical representation of a system's development lifecycle. + + +#+begin_abstract +The V-model represents the lifecycle of a system's development. +#+end_abstract + + +* TODO Representation + +This is the graphical representation of the v-model. + +#+NAME: v-model +#+BEGIN_SRC plantuml :file ../images/v-model.png :cache yes + @startuml + !theme cerulean-outline + actor Operator as operational + collections Functions as functional + control Logic as logical + boundary Physical as physical + + operational -> functional: Requirements + functional -> logical: Specification + logical -> physical: Build plan + physical -> logical + logical -> functional + functional -> operational +#+END_SRC + +#+RESULTS[7e1fc2faaeb214ca241c5b4126d06cab1818ac52]: v-model +[[file:../images/v-model.png]] |