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고준수,김경목,Ko, Joon Soo,Kim, Kyungmok 항공우주시스템공학회 2016 항공우주시스템공학회지 Vol.10 No.2
Multi disciplinary approach for aerodynamics, structure, propulsion, and flight control system is necessary to develop High Altitude Long Endurance Unmanned Aerial Vehicles (HALE UAV). Various HALE UAV development trends are surveyed to understand their operational requirements. Separating the UAV Take Off Weight by 150kg, Airworthiness implementation direction for HALE UAV is studied under the current Airworthiness regulations. NATO STANAG 4671 and STANAG 4703 Airworthiness certification criteria are analyzed, and their applicability was proposed for future HALE UAV development. In addition, minimization of the risk for UAV is studied by considering probability of cumulative catastrophic failure for HALE UAV. This Hazard Risk Index can support the future UAV Airworthiness Certification Criteria.
고준수,박성수,김경목,Ko, Joon Soo,Park, Sungsu,Kim, Kyungmok 한국항공운항학회 2015 한국항공운항학회지 Vol.23 No.2
This paper presents the algorithm for envelope protection of helicopters. The algorithm consists of two feedback control loops: inner loop and outer loop. As an inner loop control, model following control is designed to meet the ADS-33 handling qualities specification by minimizing the tracking errors between the responses of the actual model and those of the command filter. In order to implement envelope protection, saturation limiter is imposed to command channels in command filter, whose limits are computed corresponding to the envelope limit. Fast model predictive control is designed as an outer loop control to deal with saturation constraints generated by the inner loop envelope protection and also imposed by outer loop envelope protection variables. Simulation results show that the proposed algorithm yields good envelope protection performance.
Ultrafiltration 에 의한 유성분의 농축과 발효유 제조에 관한 연구
고준수(J . S . Goh),김거유(G . Y . Kim),안종건(J . K . Ahn) 한국축산학회 1989 한국축산학회지 Vol.31 No.6
This study was performed to obtain the informations needed to manufacture fermented milk products using ultrafiltration (UF) retentate. The behavior of S. Thermophilus and L. bulgaricus (the most popular starter cultures for yoghurt) during the fermentation in raw milk, UF-retentate and evaporated milk was investigated and the following results were obtained. 1. The average contents of UF-retentate components were ash 0.79%, protein 5.5%, fat 0.2%, lactose 4.82%, and total solid 11.31%, respectively. The protein contents was increased to 5.5% whereas the contents of lactose and ash in UF-retentate were similar to those in raw milk. 2. L. bulgaricus produced acid more rapid than S. thermophilus during the fermentation of raw milk, UF-retentate and evaporated milk. Mixed cultures of L. Bulgaricus and S. thermophilus showed more rapid acid production than each of those two lactic acid bacteria, and shortened the fermentation time required for the production of yoghurt to the similar level of that with raw milk. 3. The viable cells of S. thermophilus inoculated independently in raw milk reached to 6.6×l0^8cfu/ml when incubated at 42℃; for 8hours, and those of S. thermophilus in UF-retentate and evaporated milk reached to 8.9×l0^8 cfu/ml and 1.03×10^9cfu/ml, respectively, when incubated at 42℃ for 10hours, and decreased to 1×10^7cfu/ml and 8×I0^6cfu/ml respectively after the incubation of 24hours. 4. L. bulgaricus inoculated in raw milk as a sole stater after incubation for 10hours increased to 6.1×10^8cfu/ml at 42℃, and 8×10^7cfu/ml survived after incubation for 24hours at 42℃. In the case of UF-retentated and evaporated milk, the viable cells of L. bulgaricus were 5×10^9cfu/ml and 1.39×10^9cfu/ml respectively, when incubated at 42℃ for 12hours, and decreased to 4.7×l0^8cfu/ml and 5.6×10^8cfu/ml respectively at the cultivation of 24hours. 5. The viable cells of mixed cultures of S. thermophilus and L. bulgaricus fermenting in raw milk, UF-retentate and evaporated milk at 42℃ were gradually increased to 7.5×10^8cfu/ml, 1.47×10^9cfu/ml, and 1.16×10^9cfu/ml respectively till 24hours` incubation time. The highest viable cell counts was observed in UF-retentate. 6. The TCA soluble nitrogenous compounds in raw milk, UF-retentate, and evaporated milk fermented by the mixed cultures of S. thermophilus and L. bulgaricus at 42℃ were gradually increased till 12hours` incubation time. The highest TCA soluble nitrogenous compound values were observed in the UF-retentate. 7. The mixed cultures of S. thermophilus and L. bulgaricus decreased the sugar contents of raw milk, UF-retentate and evaporated milk from 4.6% to 2.1%, from 4.8% to 2.0% and from 7.4% to 4% respectively after fermentation for 12hours at 42℃.
차성관,고준수,김현욱 ( Sung Kwan Cha,Jun Soo Goh,Hyun Uk Kim ) 한국축산학회 1976 한국축산학회지 Vol.18 No.2
From several sources, three usable cultures were isolated for yogurt manufacture. Two of them have been presumptively identified as Lactobacillus bulgaricus 3 and 8, and another as Streptococcus thermophilus 22. These cultures were tested for their behavior (acid production, curd formation and flavor developments) in various yogurt mixes consisting of skim milk, shim milk powder, and whole milk powder. Lactobacillus bulgaricus 8 appeared to be the best culture for ordinary yogurt mixes. Mixed starter culture was not attempted.
소형 무인항공기 감항인증 기술기준 및 에너지 충돌기법 분석 연구
임준완,김용래,최병철,고준수,Lim, Jun-Wan,Kim, Yong-Rae,Choi, Byung-Chul,Ko, Joon-Soo 한국항공운항학회 2014 한국항공운항학회지 Vol.22 No.4
Unmanned aerial vehicles(UAVs) refer to the aircraft which carries no human pilot and is operated under remote control or in autonomous operational mode. As the UAVs can perform the dull, dangerous and difficult missions, various kinds of UAVs with different sizes and weights have been developed and operated for both civil and military application. As the avionics and communication technology related to the UAVs are matured, the demand for the UAVs is dramatically increased. Therefore, It is important to develope airworthiness process and regulations of the UAVs to minimize related risk to the man and environment. This paper describes related regulations and classification of the small UAVs for different international airworthiness authorities. The analysis of the CS-LURS verses Stanag 4702 and Stanag 4703 can provide guidelines for the generation of the airworthiness certification criteria for the small UAVs in civil sector. This paper conducted kinetic impact energy analysis of the loss of the small UAVs control scenarios and of the very small UAVs under 66 joules. Based on the analysis, the energy impact analysis can be considered before the design certification approval for the small UAVs.