{"id":224,"date":"2016-12-16T21:57:08","date_gmt":"2016-12-16T21:57:08","guid":{"rendered":"http:\/\/mrsdprojects.ri.cmu.edu\/2016teamh\/?page_id=224"},"modified":"2017-05-13T05:37:30","modified_gmt":"2017-05-13T05:37:30","slug":"evaluation","status":"publish","type":"page","link":"https:\/\/mrsdprojects.ri.cmu.edu\/2016teamh\/evaluation\/","title":{"rendered":"Evaluation"},"content":{"rendered":"

Fall Validation Experiment:<\/strong><\/p>\n

Test 1: Position Control<\/u><\/p>\n

The system performed as specified. It held the user\u2019s weight (~80kg), and did not throw the user off-balance for a variety of different postures and positions of the user\u2019s centre of mass.<\/p>\n

Test 2: Velocity Control<\/u><\/p>\n

While the skates were controlled to a constant velocity and the user could walk on them, the control was imperfect and tended to a slightly open-loop behaviour which was rectified before the encore.<\/p>\n

Fall Validation Experiment (FVE) Encore:<\/strong><\/p>\n

Test 1: Position Control<\/u><\/p>\n

Again, for the position test, the system performed as specified and held the user\u2019s weight, did not throw the user off-balance for a variety of poses including squats, leaning in the fore-aft and medio-lateral directions.<\/p>\n

Test 2: Velocity Control<\/u><\/p>\n

Improvements were made as per feedback received at the FVE, and the system worked as desired. Success conditions were achieved; the user did not fall.<\/p>\n

Spring Validation Experiment:<\/strong><\/p>\n

Success conditions were achieved for each case.<\/p>\n

Test 1: Number of steps taken<\/span><\/p>\n

On comparison between the number of steps taken with and without the system, we find that with the system,\u00a0the user can take at least 6 times the number of steps taken without the system.<\/span><\/p>\n

Steps taken without the system = 6 steps<\/span><\/p>\n

Steps taken with the system = 88+<\/span><\/p>\n

Test 2: User’s Final position<\/span><\/p>\n

The system accurately and reliably recenters to within 75 cms of the initial position<\/span><\/p>\n

Test 3: User comfort<\/span><\/p>\n

The user does not feel any major discomfort due to the VR display; there are no quantifiable metrics for user comfort outside of the user’s word. Koushik’s recorded response was that the system is comfortable to use for intervals shorter than 10-15 minutes.<\/span><\/p>\n

Test 4: User balance on the system<\/span><\/p>\n

The system demonstrated 3 steps, bending and leaning sideways to display no misclassifications and no jitter in the system.<\/span><\/p>\n

Spring\u00a0Validation Experiment (SVE) Encore:<\/strong><\/p>\n

Test 1: Number of steps taken<\/span><\/p>\n

On comparison between the number of steps taken with and without the system, we find that with the system,\u00a0the user can take at least 6 times the number of steps taken without the system. <\/span><\/p>\n

Steps without system = 6 steps<\/span><\/p>\n

Steps taken with the system = 49+<\/span><\/p>\n

Test 2: User’s Final position<\/span><\/p>\n

The system accurately and reliably recenters to within 75 cms of the initial position, \u00a0which is better than the 1 m metric set by the team as a mandatory requirement.\u00a0<\/span><\/p>\n

Test 3: User comfort<\/span><\/p>\n

There are no quantifiable metrics for user comfort outside of the user’s word. Koushik’s recorded response was that the system is comfortable to use for intervals shorter than 10-15 minutes.<\/p>\n

The user does not feel any major discomfort due to the VR display which was verified by unbiased users (Other MRSD graduates).<\/span><\/p>\n

Test 4: User balance on the system<\/span><\/p>\n

The system demonstrated standing, stepping, bending and leaning sideways to display no misclassifications and no jitter in the system.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Fall Validation Experiment: Test 1: Position Control The system performed as specified. It held the user\u2019s weight (~80kg), and did not throw the user off-balance for a variety of different postures and positions of the user\u2019s centre of mass. Test 2: Velocity Control While the skates were controlled to a constant velocity and the user… Evaluation<\/span><\/a><\/p>\n","protected":false},"author":85,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-fullwidth.php","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"class_list":["post-224","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2016teamh\/wp-json\/wp\/v2\/pages\/224","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2016teamh\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2016teamh\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2016teamh\/wp-json\/wp\/v2\/users\/85"}],"replies":[{"embeddable":true,"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2016teamh\/wp-json\/wp\/v2\/comments?post=224"}],"version-history":[{"count":9,"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2016teamh\/wp-json\/wp\/v2\/pages\/224\/revisions"}],"predecessor-version":[{"id":478,"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2016teamh\/wp-json\/wp\/v2\/pages\/224\/revisions\/478"}],"wp:attachment":[{"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2016teamh\/wp-json\/wp\/v2\/media?parent=224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}