brilliant-ember’s gists

brilliant-ember / control_functions.py

Last active March 31, 2020 03:01

Control systems helpful function

	# percent overshoot to theta angle and zeta ratio calculator
	# PD controller calculator
	#so far can only find kp value for a PD controller

	# numpy is weird it has ln has a log for some reason
	from numpy import log as ln
	from math import atan, sqrt, pi, degrees
	from sympy import symbols, simplify, fraction,solve, pprint, evalf, im, I
	from math import isclose

brilliant-ember / modulation.m

Last active April 5, 2020 12:57

Plot periodic functions in Octave or Matlab with this script. It multiplies (modulates) the carrier and the msg signals, and plots the time domain and FFT reprisentation

	% referenced gist https://gist.github.com/akiatoji/5649907
	clear ; close all; clc

	fundPeriod = pi/1000;
	num_tsteps = 1000;
	num_periods = 4;
	tstep = num_periods * fundPeriod / num_tsteps;

	t = 0:tstep:(num_periods * fundPeriod);
	msg = 2cos(400t)+4sin(500t+pi/3);

brilliant-ember / tf_to_symbolic.py

Created April 7, 2020 22:18

Converts a control lib transfer function to sympy lib symbolic equation, uses x instead of s for the symbolic representation

	def tf_to_symbolic_fraction(tf):
	x = symbols('x')
	num, den = tfdata(tf)
	num = num[0][0]
	den = den[0][0]
	counter = 1
	length_num = len(num)
	length_den = len(den)

	sym_num, sym_den = 0,0

brilliant-ember / plot_response_and_error.m

Last active April 10, 2020 21:06

Plots a system's response, and error response of various inputs namely step, ramp, and parabolic inputs.

	# u can change the input type and response by uncommenting
	## t the stions of the code that are below each subplot
	clear; clc;
	pkg load control;
	K = 32.3;
	s = tf('s');
	openLoopTf = K/( s(s+3)(s+6));
	##openLoopTf = (672(s+5)) / (s(s+6)(s+7)(s+8));;
	## closed loop
	## very important to follow this order for the input

brilliant-ember / tmux.conf

Created September 10, 2020 14:30

My Linux tmux config, for easy copy-paste between tmux and the computer, and using vim mode, and my preferred color. You have to have xclip installed

	# paste all of this here: ~/.tmux.conf

	# for copying to sys clipboard
	bind -T copy-mode-vi Enter send-keys -X copy-pipe-and-cancel "xclip -i -f -selection primary \| xclip -i -selection clipboard"
	bind -T copy-mode-vi MouseDragEnd1Pane send-keys -X copy-pipe-and-cancel "xclip -i -f -selection primary \| xclip -i -selection clipboard"
	bind -T copy-mode-vi C-j send-keys -X copy-pipe-and-cancel "xclip -i -f -selection primary \| xclip -i -selection clipboard"

	#general other stuff
	set -g default-terminal "xterm-256color"
	set -g mouse on

brilliant-ember / python_serial_receiver.py

Last active December 10, 2020 16:40

Python and Arduino Serial communication


	import serial
	from time import sleep

	COM = '/dev/ttyUSB0' #This is for linuxm Will be COM# for windows copmuters so check ur usb port names
	BAUD = 9600
	ser = serial.Serial(COM, BAUD, timeout = .1)

	print('Waiting for device');
	sleep(1)

brilliant-ember / Inverse_Z_transform_python.py

Created April 27, 2021 21:52

How to do inverse Z transform with python, this function will break up the partial fraction assuming Z transform. Note that it doesn't handle complex roots, if you have complex roots use the scipy residuez function to find the poles and coefficients.

	### Solving Z domain partial fraction with sympy
	from sympy import *
	z = symbols('z')

	def inverse_z(h):
	'''finds X(z)/z for the inverse z transform table look up
	'''
	h = h/z
	h = h.apart() * z
	return expand(h)

brilliant-ember / set-up.sh

Last active October 23, 2022 22:10

Ubuntu ML Set-up

	sudo apt install python3-pip tmux vim git jupyter podman nodejs virtualbox ruby xclip curl -y
	sudo apt install python3.10-venv -y
	pip3 install librosa tensorflow numpy matplotlib torch pandas virtualenv

	# install go
	wget https://go.dev/dl/go1.19.linux-amd64.tar.gz
	sudo rm -rf /usr/local/go && sudo tar -C /usr/local -xzf go1.19.linux-amd64.tar.gz
	export PATH=$PATH:/usr/local/go/bin
	sudo apt install gopls dlv -y

Mohammed Al brilliant-ember