{"id":631,"date":"2018-08-24T14:49:10","date_gmt":"2018-08-24T19:49:10","guid":{"rendered":"https:\/\/charles-oneill.com\/blog\/?p=631"},"modified":"2019-03-30T19:34:06","modified_gmt":"2019-03-31T00:34:06","slug":"articulated-4-bar-mount-design","status":"publish","type":"post","link":"https:\/\/charles-oneill.com\/blog\/articulated-4-bar-mount-design\/","title":{"rendered":"Articulated 4 Bar Mount Design"},"content":{"rendered":"<p>In this note, I will design an articulated 4 bar mount for a radar system using CATIA. The system needs to be designed and built rapidly for a VIP demonstration. Here&#8217;s the design:<\/p>\n<p>First, the design requirements and needs:<\/p>\n<ul>\n<li>Precise pointing requirements from nadir (straight down) to horizontal.<\/li>\n<li>Mount on a boom lift \/ cherry-picker bucket<\/li>\n<li>Separate two antennas of 30 pounds and 10 pounds by at least 2 meters with less than 1 deg of twist.<\/li>\n<li>Designed, sourced, and built within a tight schedule<\/li>\n<\/ul>\n\n\n<p>The articulated arm as designed by CATIA met the design goals with a commonly available actuator. The use of a CAD model allowed for tuning of the geometry and resulting kinematics.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"552\" src=\"https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/articulator.png\" alt=\"\" class=\"wp-image-813\" srcset=\"https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/articulator.png 1200w, https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/articulator-300x138.png 300w, https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/articulator-768x353.png 768w, https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/articulator-1024x471.png 1024w, https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/articulator-800x368.png 800w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p>Using the gearing ratio between the actuator and the output angle, conservation of power, and the measured actuator dynamics, I was able to analyze, simulate, and tune the dynamic\/transient dynamics of motion of the system. This analysis allowed for a truly coupled actuator\/mechanism design and ensured that my design remained feasible across the entire operational envelope.<\/p>\n\n\n\n<p>Design drawings were created to construct the actuation arm.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"289\" src=\"https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/arm-drawing-300x289.png\" alt=\"\" class=\"wp-image-819\" srcset=\"https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/arm-drawing-300x289.png 300w, https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/arm-drawing-768x741.png 768w, https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/arm-drawing-800x771.png 800w, https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/arm-drawing.png 840w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/figure><\/div>\n\n\n\n<p>The as-constructed articulated arm met the design requirements and when mounted on a boom-lift was successfully was used for a data collection experiment.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"540\" src=\"https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/NJ-QuarterView-1024x540.jpg\" alt=\"\" class=\"wp-image-820\" srcset=\"https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/NJ-QuarterView-1024x540.jpg 1024w, https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/NJ-QuarterView-300x158.jpg 300w, https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/NJ-QuarterView-768x405.jpg 768w, https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/NJ-QuarterView-800x422.jpg 800w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/IMG_3365-1024x768.jpg\" alt=\"\" class=\"wp-image-843\" srcset=\"https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/IMG_3365-1024x768.jpg 1024w, https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/IMG_3365-300x225.jpg 300w, https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/IMG_3365-768x576.jpg 768w, https:\/\/charles-oneill.com\/blog\/wp-content\/uploads\/2019\/03\/IMG_3365-800x600.jpg 800w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>This articulated arm mechanism&#8217;s development shows the power of CAD with CATIA for rapid support of R&amp;D projects. I was pleased.<br><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this note, I will design an articulated 4 bar mount for a radar system using CATIA. The system needs to be designed and built rapidly for a VIP demonstration. Here&#8217;s the design: First, the design requirements and needs: Precise pointing requirements from nadir (straight down) to horizontal. Mount on a boom lift \/ cherry-picker [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/posts\/631"}],"collection":[{"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/comments?post=631"}],"version-history":[{"count":8,"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/posts\/631\/revisions"}],"predecessor-version":[{"id":845,"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/posts\/631\/revisions\/845"}],"wp:attachment":[{"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/media?parent=631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/categories?post=631"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/tags?post=631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}