I Wayan Suletra
Staf Pengajar Jurusan Teknik Industri FT-UNS, Surakarta Laboratorium Perancangan dan Perencanaan Produk (P3) TI – FT UNS Jl. Ir. Sutami No. 36A Kentingan Surakarta 57126 Telp: (0271) 632 110, Fax: (0271) 632 110

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PEMODELAN PERSAMAAN NEWTON-EULER PADA PENGEMBANGAN PROSTHETIC TANGAN KOSMETIK DALAM MENENTUKAN BESARNYA DAYA PADA SISTEM KABEL EXTERNAL Herdiman, Lobes; Damayanti, Retno Wulan; Suletra, I Wayan
J@TI (TEKNIK INDUSTRI) Volume 4, No. 3, September 2009
Publisher : Departement of Industrial Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB)

Abstract

Pengembangan  komponen telapak tangan prosthetic terdiri dari metacarpal, metacarpal pollicis, dan jari tangan. Bahan yang digunakan yaitu nylon, jumlah komponen sebanyak 87 dan berat 175 gram. Kemampuan ibu jari dan jari telunjuk memegang peranan penting dalam melakukan 6 model gerakan. Posisi ujung phalanx media-distalis ibu jari dan jari telunjuk bertemu pada satu titik, sehingga mampu melakukan gerakan dasar tangan. Pengujian dengan eksperimen empiris pada pengembangan prosthetic tangan kosmetik dilakukan untuk mengetahui rotasi dari titik koordinat pada sendi pada saat aktivitas pemegangan. Sumbu koordinat ruang dan sistem dimana sumbu x, y, dan z, dengan titik nol ditetapkan pada pangkal poros utama. Model mekanisme prosthetic tangan kosmetik dengan sistem penarikan pada kendali kabel eksternal. Pengukuran tekanan pada ibu jari dengan jari telunjuk sebesar 493 gram yang dilakukan dengan alat dial indicator, pengukuran tekanan ibu jari dengan jari tengah sebesar 487 gram. Pengujian beban tarikan kabel untuk membuka jari menjadi terbuka penuh sebesar 4.291 gram dengan alat force gauge. Persamaan Newton-Euler menghasilkan besarnya torsi melalui persamaan forward (maju) dan backward (mundur). Rotasi matriks yang disimbolkan xRx+1, dengan x adalah titik mulai dan x+1 adalah titik tujuan. Titik koordinat pada tiap ruas sebagai degree of freedom pada tiga titik, yaitu titik 0, titik 1, dan titik 2. Perhitungan matriks rotasi menggunakan titik awal (origin) dan titik tujuan (destination). Titik 0 jari ditentukan pada sendi metacarpophalangeal, titik 1 pada sendi interphalangeal proximalis, dan titik 2 pada ujung komponen phalanx media-distalis sebagai end effector dimana ω0 = v0 = 0 dan gravitasi g = 9,8062 m/s2. Besarnya torsi maksimal dicapai pada gerakan spherical sebesar 10,00449 N.m, dengan mengkonversikan besaran torsi ke daya maka dicapai sebesar untuk gerakan spherical sebesar 12,5046 watt, dan daya terkecil pada gerakan lateral dan tip sebesar 12,5041 watt. Daya yang dihasilkan dapat digunakan sebagai dasar menentukan spesifikasi motor. Spesifikasi motor yaitu tipe motor servo dengan seri PTSV4835 atau SV4835, rpm 55,1, volt (12,13 V), I (4.27 amp), input (51,82 watt), torque ( 47 kg-cm), output (26,60 watt) dan efficiency sebesar 51,33%. Kata kunci: Prosthetic tangan kosmetik, functional requirements, 6 model gerakan dasar, Newton Euler, tosi, daya Abstract   Development of Prosthetic hand component consists of the metacarpal, metacarpal pollicis, and fingers. The material used is nylon, the number of components of 87 and 175 grams weight. Ability thumb and index finger an important role in the movement to 6 models. The position of the tip-media Phalanx distalis thumb and index finger meet at one point, so that they can perform the basic hand movements. Testing with empirical experiments on the development of cosmetics Prosthetic hand performed to determine the rotation of the coordinate points on the joints during activities of holdings. Coordinate axis and space axis system where x, y, and z, with zero point set at the base of the main shaft. Model mechanism cosmetics Prosthetic hand with withdrawal system to control an external cable. Measurement of pressure on the thumb with the index finger of 493 grams which is done by means of a dial indicator, measuring the pressure with the thumb middle finger for 487 grams. Load Testing pull cable to open the fingers to be fully open by 4291 grams with a force gauge. Newton-Euler equations to produce the amount of torque through the equation forward (forward) and backward (backward). Rotation matrix symbolized xRx +1, with x is the starting point and x +1 is the destination point. Point coordinates on each segment as a degree of freedom on three points, namely the point 0, point 1 and point 2. Rotation matrix calculation using the starting point (origin) and the destination point (destination). Fingers 0 points specified in the metacarpophalangeal joints, point 1 on the interphalangeal joints proximalis, and point 2 at the end of the media components of Phalanx distalis as end-effector where ω0 = v0 = 0 and the gravity g = 9.8062 m/s2. The amount of the maximum torque is achieved on the movement of spherical 10.00449 Nm, with the amount of torque to convert the power to achieve registration to the movement of spherical 12.5046 watts, and the smallest at lateral movement and the tip of 12.5041 watts. The resulting power can be used as the basis for determining the motor specifications. Specification of the type of motor servo motor with PTSV4835 or SV4835 series, 55.1 rpm, volts (12.13 V), I (4:27 amp), the input (51.82 watts), torque (47 kg-cm), output (26.60 watts) and the efficiency of 51.33%. Keywords: Prosthetic hand cosmetics, functional requirements, the basic motion model 6, Newton Euler, Tosi, power
Analisa Kelayakan Pabrik Neon Elektronik (NE) Sukoharjo Lutfia, Nina; Suletra, I Wayan; Fahma, Fakhrina
Performa: Media Ilmiah Teknik Industri Vol 3, No 1 (2004): PERFORMA Vol. 3 No 1, Maret 2004
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (106.181 KB) | DOI: 10.20961/performa.3.1.11128

Abstract

The increasing of electricity base rates initiate people to choose the energy saving lamp in order to decrease their electricity bill. It impacts the demand of energy saving lamps increase. Neon Electronic produces such an energy saving lamp with the electronic circuit called ballast electronic. Neon Electronic plan to develop the factory and expand the marketing area.This research is aimed to know the feasibilities of the Neon Electronic (NE) development plan. The feasibilities study covered a research on market aspects, production and operastional aspects, and financial aspects.Based on the result of market aspects, this development plan is feasible; because of the people demand. so, there is an opprtunity to implement this plan. Despite from that there is a particular interest factors such as the quality of Neon Electronic is higher than the around competitors.From the production and operational aspects, this plan is also feasible to continue because there is no barrier on the availability of the machines and tools and another production fasilities, the development fund, and human resources.With the assumption that the interest rate is 16% and all the product sold, the result of investment criteria; NPV is Rp. 167.778.623, IRR = 98% which is bigger than the interest rate, Discounted Payback Period = 1 year 3,78 months, no cash deficit, the Profitability Index above one which is 2,86, and the Break Even Point (BEP) 2004 is Rp. 307.879.319. The financial aspects point of view recommends this development plan is possible to continue.
Prototipe Alat Pemantauan Suhu untuk Rantai Dingin Produk Mengunakan Near Field Communication, Studi Kasus Distribusi Darah Priyandari, Yusuf; Suletra, I Wayan; Mas’ud, Azmi; Pujiharto, Adi Norrochmat
Jurnal Ilmiah Teknik Industri Vol. 16, No. 2, Desember 2017
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (207.838 KB) | DOI: 10.23917/jiti.v16i2.3880

Abstract

Temperature monitoring apparatus is required for the distribution of certain products that are distributed using cold chain method. Temperature gauges that use analog and digital thermometers can not store temperature data in transit. The digital temperature register apparatus (logger) in the market temperature is relatively expensive and does not provide early warning if the temperature in the storage box products out of permitted temperature limits. The research developed a prototype of a temperature monitoring device for the distribution of cold chain products. Case studies on blood distribution are used as a basis for determining the need for temperature monitoring devices. The product prototype is made by stages in accordance with generic product development method. The resulting prototype can provide temperature information in the cold box during the course of blood distribution. The prototype can also provide warnings in the form of sounds and lights when the temperature inside the cold box is outside the ideal temperature limit / permitted for the blood distribution process. Temperature history data during the trip can be stored in NFC Tags. The data can then be read using smart-phone devices that feature NFC.
Identifikasi Karakteristik yang Mempengaruhi Kesuksesan Agen dan Atribut Asuransi yang Mempengaruhi Nasabah Masuk AJB Bumiputera 1912 Cabang Kediri Kusumawati, Ana; R., Roni Zakaria; Suletra, I Wayan
Performa: Media Ilmiah Teknik Industri Vol 3, No 1 (2004): PERFORMA Vol. 3 No 1, Maret 2004
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (132.978 KB) | DOI: 10.20961/performa.3.1.11126

Abstract

One of the developing service industries developing in Indonesia economy which is undergoing crisis is insurance industry, whose productivity and business quality are depended on agents’ capability as the main doer who are corresponding with marker and characteristic from this insurance. This research attempts to find out agent’s profile and characteristic, perception given from customer and also insurance’s attributes that influence a customer to join.The measurement used on this research is Likert scale with the valid questionnaires distributed to 117 respondents agents and 46 respondents customers from AJB Bumiputera 1912 branch Kediri. The results shows that successful agents’ profile generally women(65,12%), age between 35-50 years old(75%), come from East Java(58,26%), married(65,48%), have S1 degree(85,71%), and experience on this field more than 6 years(88%). By using discriminate Analysis it results that successful agents have knowledge and higher assertiveness than less successful agents, but owning lower recognition motivation. According to the customer, there is no difference between successful and less successful agents. By using Pareto diagram, we can conclude that agents are the most important attribute that influence customer to join with the insurance.
Usulan Perencanaan Sampling Penerimaan Berdasarkan Kecacatan Atribut dengan Metode Mil Std 105E pada Proses Penyamakan Kulit Herdiman, Lobes; Suletra, I Wayan; Hapsari, Amithya Dwi
Performa: Media Ilmiah Teknik Industri Vol 7, No 1 (2008): PERFORMA Vol. 7, No. 1 Maret 2008
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (536.204 KB) | DOI: 10.20961/performa.7.1.13770

Abstract

Plan acceptance of sampel with method of Military Standard 105E is prosedure which used in decision making to product yielded by company, background of this method him is to accommodate accomplishment of producer ekspektasi and consumer in inspection of[is quality of product with acceptance mechanism or deduction of lot. Pursuant to from amount of sampel proposals, existence of improvement of percentage of probability for normal inspection at quality of I mount 24% and quality of II mount 10%, tight inspection at quality of I mount 26% and quality of II mount 12%, diffuse inspection at quality of I mount 23% and quality of II mount 4%. While SOP proposal have the character of independent to the each category so that deduction of lot earn happened at every category not requiring accumulation of amount of found defect as SOP early.
Analisis Stabilitas dan Kapabilitas Proses Spinning Benang Katun dengan Metode Six Sigma (Studi Kasus PT. Primissima) Amri, Sahrial; Suletra, I Wayan; Fahma, Fakhrina
Performa: Media Ilmiah Teknik Industri Vol 4, No 1 (2005): PERFORMA Vol. 4 No 1, Maret 2005
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (120.572 KB) | DOI: 10.20961/performa.4.1.11148

Abstract

As a textile company which produces grey, PT. Primissima surely needs high quality yarn which is also produced in its factory as its main basic material. Decline in yarn quality that significantly happened on May until August 2004 causes negative effects to the company, especially in customer satisfaction. Analysis of process stability and capability is should be done to prove and explain the problem, particularly on the existing spinning III process. Analysis using Six Sigma method begins with identifying customer needs, then mapping customer needs into the critical to quality characteristics (CTQ), determining CTQ priority level based on customer importance rating and customer satisfaction rating, and last, measuring sigma value, process stabilityand process capability of the CTQ top priority level. The result that focused on unevenness yarn CTQ shows, with sigma value of 4.07 sigma, process condition isn’t stable and capable enough to meet the company’s specification target. From the process analysis is also obtained information that many factors like environment, machine, tool, process, material, employee, and measurement system are supposed causing the problem. Improvement and control suggestions are also given here.
Penentuan Lokasi Ideal SD dan MI Se-Kecamatan Pejagoan Kabupaten Kebumen dengan Menggunakan Model P-Median, P-Center, dan Max Covering Nurcahyono, Ike; Suletra, I Wayan; Liquiddanu, Eko
Performa: Media Ilmiah Teknik Industri Vol 9, No 2 (2010): PERFORMA Vol. 9, No 2 September 2010
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1041.479 KB) | DOI: 10.20961/performa.9.2.13894

Abstract

Pejagoan district is an outskirt near the central administration of Kebumen Regency. This position causes some people prefer to go to city for schooling. This condition becomes one of the factors for decreasing number of students that apply to Pejagoan district. Many schools lacks of students. Kebumen Regency education department has a plan to reduce some schools that do not fulfill the criteria of minimum number of students. Determining ideal location and number of schools has to be appropriate in order to does not cause problems in the future. In this study, the determining of location and the number of school in Pejagoan district are conducted by identifying the location and the distance of students’ house to the location of current elementary schools that considered as candidate locations. The school locations and optimum number of school are determined by using three models, p-center, p-median, and maximal covering model. These are conducted to identify the performance of each model and compare all of them. The calculation result concluded that p-median model is the most appropriate model to solve the problem. The optimum number of school is 26 and the average distance of students to the nearest school is 215.98 meters with deviation standard 138.08 meters, and the furthest distance is 1229.3 meters.
Penentuan Alokasi Buffer Untuk Meningkatkan Performansi Lini Produksi (Studi Kasus di PT. General Electric Lighting Indonesia) Suletra, I Wayan; Hisyam, Muh.; Prasetyo, Sigit
Performa: Media Ilmiah Teknik Industri Vol 6, No 1 (2007): PERFORMA Vol. 6, No. 1 Maret 2007
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (188.053 KB) | DOI: 10.20961/performa.6.1.12828

Abstract

PT. GE Lighting Indonesia is a manufacturing company that producing lamp. In generally, PT. GE Lighting Indonesia’s producing line consists of 5 machines with buffer allocation storage between machine that have early capacity of buffer1= 1225 units, buffer2= 915 units, buffer3=820 units, and buffer4=545 units. The allocation of these buffer is definetely done with purpose to place output from machine before processed to the next machine. Time difference process in every machine make the stream of production process become less fluent and affecting less maximal throughput. Other cause that making the throughput of production line process less maximal is machine damage factor. Although the preventive maintenance policy is applied in PT. GE Lighting Indonesia remain to be the machine damage cannot be obviated at production process take place. This research will try to redetermine the buffer allocation in PT. GE Lighting Indonesia in order to make the production process more fluent, so that can increase the throughput in production line. The method that is use to redetermine the buffer allocation is simulation approach. The reason why the author use this method is because there wasn’t found a representative and valid analytical model that match with the system.The simulation is done with Promodel 4.0 software. Based on the experiment design and running of simulation, it’s achieved a conclusion that the best alternative buffer capacity is at 900 units (buffer1, buffer2, buffer3, buffer4 has a same capacity at 900 units) with average throughput at 9.651 units/shift. While in the early buffer capacity only produce as many as 9.207 units/shift. Finally, if it’s compared with the early condition, redetermining the buffer allocation can increase the throughput of production line process equal to 444 units/shift.
Econometric Analysis With Panel Data: Measuring Relations And Contributions Of Influential Factors On Income Per Capita Across Districts In Sragen Regency Anugraha, Raditya Teguh; Suletra, I Wayan; Priyandari, Yusuf
Performa: Media Ilmiah Teknik Industri Vol 13, No 1 (2014): PERFORMA Vol. 13, No 1 Maret 2014
Publisher : Program Studi Teknik Industri, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (408.925 KB) | DOI: 10.20961/performa.13.1.12706

Abstract

Levels of prosperity of an area is measured by income per capita. Income per capita is derived from regional income divided by mid-year population number. In Srgaen Regency, income per capita amongdistricts very different significanly so a reaserch is needed to know the causes of this variability. In general, many factors affect the income per capita and each factor may have different effect in form of relationship and level of contribution. To solve these problems this reaserch used econometric which is the result of a certain outlook on the role of economics, consists of the application of mathematical statistics to economic data to lend empirical support to the models constructed by mathematical economics and to obtain numerical results. Panel data which is a combination of data type cross-section and times series is used in this study. To combine the indicators variables that have different units is used factor analysis. Regression model pooled least square (PLS), fixed effect, and random effect was tested to get the most representative models describing the relationship between income per capita and the factors that influence. From the analysis it shown that not all district have the same model. Thus the Government of Sragen Regency can treatment on different district based on the factors that influence and encourage these factors so that the income per capita is increasing.
Evaluasi Layanan Taksi Menggunakan Agen Based Modeling (ABM) Istiqomah, Silvi; Yuniaristanto, Y; Suletra, I Wayan
Jurnal Ilmiah Teknik Industri Vol. 18, No. 1, Juni 2019
Publisher : Muhammadiyah University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.025 KB) | DOI: 10.23917/jiti.v18i1.7227

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Taxi services involve the number of taxi and demand. A balance is needed for operated taxi and demand, so that the number of canceled order decreases. This system involves taxi and consumers as agents with various behaviors from their agents, then solved using modeling methods. Agent-based modeling is a feasible method used in this study because it can accommodate the properties and attributes of each agent. From the scenario that has been done, the average number of good fleets to operate is 103 fleets, with the canceled order rate is 1.2% and this model proves that the number of operated taxi is sensitive to the number of requests that exist.