{"id":1533,"date":"2021-05-03T20:58:18","date_gmt":"2021-05-03T20:58:18","guid":{"rendered":"http:\/\/tiago-jpl.santa.pt\/?page_id=1533"},"modified":"2022-07-23T22:02:57","modified_gmt":"2022-07-23T22:02:57","slug":"test-stand-1","status":"publish","type":"page","link":"https:\/\/tafra.pt\/?page_id=1533","title":{"rendered":"Test Stand 1"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"1533\" class=\"elementor elementor-1533\" data-elementor-settings=\"[]\">\n\t\t\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4d5268a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4d5268a\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d46a2d3\" data-id=\"d46a2d3\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-44d031b elementor-widget elementor-widget-heading\" data-id=\"44d031b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Old Test Stand<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c53cf4a elementor-widget elementor-widget-text-editor\" data-id=\"c53cf4a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<p>To have data about the performance of rocket motors a test stand was developed. The test stand allows us to measure and record the force exerted by the motor during propellant burn.<br \/>On this page I talk about the stand structure, the hardware used and the software developed for the stand controller and for processing the data obtained.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-f991ae0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f991ae0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-d650b2c\" data-id=\"d650b2c\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7512a67 elementor-widget elementor-widget-heading\" data-id=\"7512a67\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Test stand structure<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-039de5d elementor-widget elementor-widget-text-editor\" data-id=\"039de5d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<p>The test stand is made of aluminum. The structure is essentially composed of two parts:<\/p><ul><li>A frame vertically where the load cell (component in charge of reading the force coming from the rocket) is fixed;<\/li><li>A frame to support the rocket during firing;<\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-82e039e elementor-align-center elementor-widget elementor-widget-button\" data-id=\"82e039e\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a href=\"\/wp-content\/uploads\/legacy\/teststand\/design.pdf\" class=\"elementor-button-link elementor-button elementor-size-sm elementor-animation-grow\" role=\"button\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">3D Design<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-9b0bdb6\" data-id=\"9b0bdb6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d6c1ddd elementor-widget elementor-widget-image\" data-id=\"d6c1ddd\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"\/wp-content\/uploads\/legacy\/teststand\/structure.jpg\">\n\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/tafra.pt\/wp-content\/uploads\/elementor\/thumbs\/structure-ps7fig6xt7ecwixiej4yfoeqvdo3mw1u8325m9xda8.jpg\" title=\"structure\" alt=\"structure\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-431e319 elementor-widget elementor-widget-spacer\" data-id=\"431e319\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ed1cb6a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ed1cb6a\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-1bdafa7\" data-id=\"1bdafa7\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1be9dd7 elementor-widget elementor-widget-heading\" data-id=\"1be9dd7\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Eletronics and Firmware<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a99b78f elementor-widget elementor-widget-text-editor\" data-id=\"a99b78f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<p>An Arduino microcontroller is used to collect the data coming from the load cell. The microcontroller will store on a microSD card a .txt file with all the data collected from the load cell (raw data) and the corresponding time instants for each of the samples (in mS).<br \/>When necessary, the same hardware is also used to create the calibration files. The calibration process aims to establish a correspondence between the values coming from the load cell and the effective force applied by the rocket motor. The load sensor exhibits a near-linear behavior.<br \/>* The available schematic already included some improvements that migrated to the new test stand: remote ignition, WiFi connection&#8230;<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-578fca1 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"578fca1\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a href=\"\/wp-content\/uploads\/legacy\/teststand\/schematic.pdf\" class=\"elementor-button-link elementor-button elementor-size-sm elementor-animation-grow\" role=\"button\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Electronic schematics<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-1338b9c\" data-id=\"1338b9c\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-81b5f22 elementor-widget elementor-widget-image\" data-id=\"81b5f22\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"\/wp-content\/uploads\/legacy\/teststand\/eletronics-scaled.jpg\">\n\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/tafra.pt\/wp-content\/uploads\/elementor\/thumbs\/eletronics-scaled-ps7fp3vs7yixid4rzrosf6lanpm26f2c7tt8m79yg0.jpg\" title=\"eletronics\" alt=\"eletronics\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8913718 elementor-widget elementor-widget-spacer\" data-id=\"8913718\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7c58dfc elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7c58dfc\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1f46177\" data-id=\"1f46177\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-65a7c7c elementor-widget elementor-widget-heading\" data-id=\"65a7c7c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Data processing software<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f2c9a77 elementor-widget elementor-widget-text-editor\" data-id=\"f2c9a77\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<p>A program written in python is used to process the data collected by the microcontroller. This program creates an excel sheet that contains the data originated from the stand readings.<br \/>The resulting spreadsheet contains a table that shows us the applied force at various times during the firing.<br \/>Thus, I can finally evaluate the result of an engine firing.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d475907 elementor-widget elementor-widget-spacer\" data-id=\"d475907\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Old Test Stand To have data about the performance of rocket motors a test stand was developed. The test stand allows us to measure and record the force exerted by the motor during propellant burn.On this page I talk about the stand structure, the hardware used and the software developed for the stand controller and &#8230; <a title=\"Test Stand 1\" class=\"read-more\" href=\"https:\/\/tafra.pt\/?page_id=1533\" aria-label=\"Mais sobre Test Stand 1\">Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/tafra.pt\/index.php?rest_route=\/wp\/v2\/pages\/1533"}],"collection":[{"href":"https:\/\/tafra.pt\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/tafra.pt\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/tafra.pt\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tafra.pt\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1533"}],"version-history":[{"count":164,"href":"https:\/\/tafra.pt\/index.php?rest_route=\/wp\/v2\/pages\/1533\/revisions"}],"predecessor-version":[{"id":3233,"href":"https:\/\/tafra.pt\/index.php?rest_route=\/wp\/v2\/pages\/1533\/revisions\/3233"}],"wp:attachment":[{"href":"https:\/\/tafra.pt\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1533"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}