Optimal active vibration absorber: Design and experimental results

An optimal active vibration absorber can provide guaranteed closed-loop stability and control for large flexible space structures with collocated sensors/actuators. The active vibration absorber is a second-order dynamic system which is designed to suppress any unwanted structural vibration. This can be designed with minimum knowledge of the controlled system. Two methods for optimizing the active vibration absorber parameters are illustrated: minimum resonant amplitude and frequency matched active controllers. The Controls-Structures Interaction Phase-1 Evolutionary Model at NASA LaRC is used to demonstrate the effectiveness of the active vibration absorber for vibration suppression. Performance is compared numerically and experimentally using acceleration feedback

The Ursinus Weekly, November 10, 1958

ACES banquet for seniors features outstanding men • Y seminar Nov. 19; SWC to sponsor forum on religion • Local concert schedule for area announced • Group plays presented Tues. in Bomberger • Freshmen hold election amid sophomore interference Wednesday • Dr. Donald Helfferich inaugurated President • Anderson\u27s play to be staged November 21-22 • Editorial: Facts • I do not agree • College rules • Bear\u27s eleven drop sixth straight to Haverford 38-6 • Basketball team begins practice for \u2758-\u2759 season • U.C. belles tied by West Chester; J.V. team wins • Soccer squad whips Hens; Drexel wins 8-2 • APO holds square dance; Pledge class inducted • Letters to the editorhttps://digitalcommons.ursinus.edu/weekly/1371/thumbnail.jp

The Ursinus Weekly, March 23, 1959

Student-faculty show was well received by Ursinus • Students urged to take SS test, April 30 • U.C. students can enter public speaking contest • Ursinus to host annual county science fair • MSGA discusses new projects March 16 • Dr. Schmoyer to discuss growth of liturgy • Mrs. P. Streich to talk this Wednesday • May Day boasts long history; featured at Ursinus since 1905 • Campus Chest ends; Campaign is successful • Art seminars to begin on April 8 • S-P Jaycees to sponsor Easter sunrise service • Editorial: That\u27s it • Our escape from the communists • Letters to the editor • Antics • Girls finish b-ball season; Win 81-31 • Track team practices for opener • Baseball team begins practice for \u2759 season • Men\u27s tennis team getting into shape • APO sells paperbacks • Dean\u27s list • Museum presents recent print sequenceshttps://digitalcommons.ursinus.edu/weekly/1381/thumbnail.jp

Pathophysiology of Asthma and Chronic Obstuctive Pulmonary Disease (COPD)

“Asthma is a disease characterized by an increased responsiveness of the trachea and bronchi to various stimuli and manifested by a widespread narrowing of the airways that changes in severity either spontaneously or in response to therapy.” The airway narrowing is the end result of some combination of bronchial muscle contraction, tissue inflammation, mucosal edema, and luminal occlusion by cellular debris and thickened secretions. During the last decade, basic and applied research has shed light on the physiology of the above changes and has led to breakthroughs in therapy and the more rational use of older and newer therapeutic agents, both separately and together

The Ursinus Weekly, October 20, 1958

Y presents seminar Oct. 29; Greenback to address group • Funds available to organizations announced Oct. 9 • Naval officer to visit campus • Juniors nominate \u2760 Ruby editors • Men\u27s government gives concessions ; Holds trial • Debating Club meets; Opponents named • Dylan Thomas\u27 Under Milkwood to be staged • Joan of Lorraine\u27s members picked; Play rehearsals begin • Homecoming Saturday; Old timers to return • Chess Club meets; Opponents named • Elliott-Kalodner debate Oct. 22 on state party issues • Editorial: Reading, a lost art • Down beat • Book review • Sophs defeat frosh by 55-44; 1962 football team loses • U.C. soccermen tie Rutgers 4-4; Lose to Fords • U.C. belles beat Swarthmore; Lose to Temple 3-2 • Football squad drops third straight tilt 8-0 • Local concert attended by Ursinus students Sat.https://digitalcommons.ursinus.edu/weekly/1369/thumbnail.jp

The Ursinus Weekly, March 16, 1959

Dr. Helen Cam\u27s Forum talk is well received by Ursinus • S-F show expected to be smash success • Fraternity bids signed today • Curtain Club chooses cast for Spring play • Inter-fraternity weekend to be held April 24-26 • SEAP holds convention at Ursinus College • Girls chosen for May Day dances; Practice begins soon for the event • M. Shilton appointed as new Weekly editor • Dr. Singer discusses mental illness, Mar. 4 • Frosh dance • Editorial: Decisions • APO sells paperbacks • Business Club: Job interview • Prof opinion • Varsity trounces Albright 79-26; J-V\u27s victorious • Tennis team prepares for 1959 season • Track prospects look good for 1959 season • Girl b-ballers beat Beaver by 74-44 • Letters to the editor • Big-little sister partyhttps://digitalcommons.ursinus.edu/weekly/1380/thumbnail.jp

The Ursinus Weekly, October 13, 1958

Men\u27s student government publishes new rules booklet • Dr. C. N. Parkinson enthralls Forum audience Oct. 7 • Folk singer to appear at museum this Saturday • Dinner held for frosh women in Paisley, Oct. 7 • Joan of Lorraine picked for Fall play; Tryouts on Oct. 13-14 • YM-YW holds annual Fall weekend retreat • APO discusses projects; Cleans college woods • Editorial: Busy • Letters to the editor • Conformists • Little dirty face • Brighter light • U.C. soccer team ties Hill School in pre-season tilt • U.C. cross country team is formed • Sophs tally run in final frame to edge out freshmen • Bear\u27s eleven lose to Johns Hopkins by 12-0 • Business Administration Club holds first meetinghttps://digitalcommons.ursinus.edu/weekly/1368/thumbnail.jp

The Ursinus Weekly, November 3, 1958

Topic of marriage and sex discussed at YMCA seminar • King of swing to be at Academy on November 14 • Dr. Calvin Yost named Ursinus Library head • MSGA revises trial procedure for students • Short plays by Wilder & Thomas to be staged • Curtain Club members rehearse daily for Joan of Lorraine production • S. Eikner Homecoming queen: Gala weekend • Kallenbach, Brown, Drummond, Megill head \u2760 Ruby • Dr. D. L. Helfferich inaugurated Nov. 2 • Editorial: Answer • Letters to the editor • Dances • College years • Satire • Soccermen whip alumni, Mules; Lose to Garnet • Hockey squad places five on all-college • Bear eleven lose two to Garnet and Wagner • Dean\u27s listhttps://digitalcommons.ursinus.edu/weekly/1370/thumbnail.jp

The Ursinus Weekly, April 14, 1958

Women\u27s student council to hold election April 22nd • ICC holds panel discussion, April 9 • Middle East topic of Eilts at Forum • Meistersingers to present concert • Music room receives new equipment and records • YMCA will hold elections for new officers, Tuesday April 22nd • MSGA presents new rules; Sets election day May 7 • Cub & Key members tapped at junior prom • Dance groups for May Day named • Frosh present Bermuda bound starring Stylers • Editorial: It\u27s your decision • Review: Curtain Club productions • Age of man: Epilogue • \u2758 tennis team evaluated; Fair season predicted • Swarthmore foe of lacrosse team • Badminton team beats Bryn Mawr; Finish undefeated • Tennis practice begins for girls; Schedule set • Prospects good for \u2758 cindermen • Big 2nd inning helps Bears beat Lions, 7-5 • Mermaids finish \u2758 season Mar. 17https://digitalcommons.ursinus.edu/weekly/1404/thumbnail.jp

The Ursinus Weekly, April 21, 1958

YM-YWCA, WAA, WSGA elections held Tues., April 22 • Fernbrook site of Spring YM-YW retreat, May 2-4 • Spring concert given Thursday • Business staff picked for 1959 yearbook • Women\u27s Club invites senior women to dessert • She stoops to conquer given by Curtain Club, May 8, 9, 10th • L. Lanin featured at inter-frat weekend • MSGA petitions begin circulation today till May 4 • Final forum on art given April 14 • Editorial: Cadaverism • Road to war • Baseball prayer • Educationalistic personnel • Men\u27s tennis team opens season; F&M opponent • Haverford humiliates UC as cindermen lose meet • Lacrosse squad smashes Garnet • Bear nine blast Drexel; Walks lead to defeat by Hens • Southern opposition succumbs to Ursinus • Middle Atlantic Conference announces football setup • Ursinus may not enter Penn Relays this weekend • Great variety shown in March\u27s Library accessions • Mental health week April 27 to May 5https://digitalcommons.ursinus.edu/weekly/1405/thumbnail.jp