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임의형상의 로봇 충돌체와 사람간 충돌 힘/압력을 추정하는 인공지능 네트워크
차영훈(Young Hoon Cha),임성수(Sungsoo Rhim),신헌섭(Heonseop Shin) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11
Collisions with people must always be considered when robots operate close to humans. The motion state of the robot influences the collision force/pressure generated during a collision, the location of human impact, and the shape of the collision. Among these factors, the collision shape varies for each robot, making it challenging to acquire accurate shape information. Previous studies have relied on formulas that approximate the shape with a simplified geometry. This paper introduces an artificial intelligence network model that takes arbitrary shape information stored in the Standard Triangle Language (STL) format as input to estimate the precise shape details. To assess the performance of our artificial intelligence network, we compared the collision force/pressure results with those from previous studies and real-world experiments.
지용철,손병길,최은석,이시우,신종현,차영훈,Chi, Yong-Chul,Son, Byung-Gil,Choi, Eun-Seok,Lee, Si-Ou,Shin, Jong-Hyun,Cha, Young-Hoon 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.6
Objectives : After lumbar microdiscectomy there are relatively higher incidence of readmission because of various postoperative discomfort. Analyzing these readmitted patients in our private hospital where the patients can be readmitted more easily, we expect to find out which factors are associated with improvement of the surgical outcome. Patients and Methoes : After discharge all significant patient's clinical data were registered to our computerized data bank system and periodic follow-up were performed. The authors analysed 651(97.7%) cases followed up over 2 years(average 3 years) out of 666 patients who underwent a initial lumbar microdiscectomy from May, 1994 to April, 1997. Among them, 63 patients(9.7%) were readmitted. Results : Among the patients readmitted, 29 patients(4.5%) were reoperated because of recurred disc herniation, 17 patients were myofascial pain syndrome, 4 patients were discitis, 3 patients were adhesion and one patient was epidural abscess. Treatment results of these readmitted patients showed that success rate of all readmitted patients was 68.3%, reoperation was 58.6% and myofascial pain syndrome was 82.4%. Conclusion : Treatment results of the patients readmitted because of a continuous lumbago or leg pain after microdiscectomy were acceptable through the careful analysis of the causes of the recurrent symptom. Therefore, the incidence of the chronic failed back syndrome can be reduced by efforting a more active management through readmission.