GCIP Workshop Presentation, 14 Aug 2018 by Aqua Vision Energy, Inc. Ozer Cakir and Dr. Ismail Cicek


AQUA VISION ENERGY, Inc. made a presentation at the GCIP Summer Workshop Summer Camp Event at CISCO Innovation Center at Istanbul Tehnical University, Ayazaga Campus, Istanbul, Turkey.

Technical Director of AQUA Vision, Mr. Ozer Cakir, Marine Engineer with over 25 years of experience, along with support from ITU Academician Dr. Ismail Cicek, presented and reviewed their presentation on their innovative solution with with Global Cleantech Innovation Programme (GCIP) Team. The presentation aims to explain the product using Work Model Development and Application Methodology.

A special thanks to GCIP Cleantech mentors and workshop program organizers, the presentation methodology and reviews are becoming very helpful for understanding the methodology of business development and presentation methodology.

With Aqua Vision’s patented innovative product “ENERGY CARPET”, Aqua Vision aims to convert the energy from waves into usable electrical power.

GDS SERS - Industry 4.0 Readiness -DemoView-RefrigSyst

Industry 4.0: Example of Using GDS Industry 4.0 Components (IoT) and Math Tools (Twin Model Creations) for NI LabVIEW

Develop the simulation of your systems and processes for your Industry 4.0 readiness! (with our Industry 4.0 Component and Math Tools for NI LabVIEW)

For Industry 4.0 readiness, plant managers must develop a digital twin simulation model of their platform and this is not an easy job! For this, engineering systems, incorporating sub-systems, components, and processes and all those need to accurately be modeled using engineering modeling techniques. This is a needed development for the readiness of the Industry 4.0 compatibility of your platform management.

We, at GDS Muhendislik ARGE, develop simulation of platforms, using engineering principles, thermodynamics, heat transfer, fluid mechanics, and such. An example of such a simulation system in shown in Figure, which is a Refrigeration System of a cargo ship. Our simulation expertise, included but not limited to, diesel engines, generators and electrical use, lubrication systems, cooling systems, heating systems, hydraulic and pneumatic systems, pumps, separators, compressors, valves, and their control units. We are the experts in developing both component models and math models. We combined these into two supplementing tools as products. Please click here for more information about our products… A summary of our tools are follows:

We offer two products for your Industry 4.0 integration solutions as the following:

GDS Engineering R&D Product #1:
Industry 4.0 Component Models for LabVIEW:

  • This tool basically include library of programmable Graphical User Interface (GUI) objects for LabVIEW development environment.
  • Accessible within LabVIEW, our libraries contains almost all necessary components to develop a GUI for a plant or process system, as the infrastructure for the Internet of Things (IoT).
  • Examples use of our libraries are petroleum refinery plant, electrical generation plants, systems in ships, airplanes, trains, chemical process plants, food processing plants, etc.
  • This library was developed for LabVIEW developers and is compatible with LabVIEW 2013 version or later.

GDS Engineering R&D Product #2:
Industry 4.0 Mathematical Models for LabVIEW:

  • This tool includes Virtual Instrument (VI) libraries consisting of mathematical modeling of heat exchangers, filters, pumps, compressors, diesel engines, boilers, etc.

Additionally, we provide engineering support services for your Industry 4.0 effort, as following:

Engineering Service 1: Programming your platform, process or engine systems (Sensor/Device data):

  •  For connecting your plant systems to LabVIEW, we recommend LabVIEW and National Instruments (NI) Data Acquisition and Instrumentation products (www.ni.com). NI provides software and training; however, we can provide engineering services to develop your software to connect your sensor network into your main program.

Engineering Service 2: Component Modeling & Simulation Work Support:

  • We can help develop your component modeling and simulation system as either engineering support service to you or we can provide training to your personnel. We generally are experienced to develop 1-GUI-page of system development in several weeks if the layout drawings and the information of the components are available.

DUYURU: ÜRÜN GELİŞTİRME ve ARGE Amaçlı Test Hizmetlerimiz (İTÜ GTTM)

İTÜ Denizcilik Fakültesi Gemi Teçhizatı Test Merkezi: GTTM

Kuruluş: 2014

Lokasyon: İTÜ Denizcilik Fakültesi, Tuzla-İSTANBUL

TURKAK akreditasyonuna sahip test merkezi

Test Hizmetleri: ARGE ve ÜRGE projelerinin doğrulama, geçerleme, ve belgelendirme süreçlerine proje ekibimiz ile destek

Eğitim Hizmetleri: Test ve Değerlendirme, MIL-STD-810G, RTCA-DO-160G, MIL-STD-461F, Tehlikeli Madde Ambalaj Ürünlerinin Test’leri ve Belgelendirilmesi, Test Merkezileri Yönetimi, Proje Yönetimi, ARGE ve İnovasyon Yönetimi ve benzeri konularda 1-3 günlük kısa süreli eğitimler.

Test Kabiliyetlerimiz:

  • İklimlendirme Test Kabini: · -70 °C ile +150 °C arası sıcaklık;  20- 98 % nem aralığı, 1m³ hacim
  • Düşürme (Drop) Test Cihazı: Düşürme Yüksekliği 60cm ile 230cm; Kapasite 350kg, Açılı Düşmeye Elverişli
  • Basınç İstasyonu: Su veya hava ile iç basınç testleri. 0,1 bar ile 2,5 bar arası kapasite
  • İstif / Statik Yükleme Test’leri: Sıcaklık Kontrollü Odalarda/Oda sıcaklığında; Blok ağırlıklar kullanılarak istenilen yük
  • Soğuk Oda / Sıcak Oda İstif Testleri: Soğuk Oda: -18 deg.C, 2x2x3 m.; Sıcak Oda: +40 degC, 2x3x3 m.
  • Tuzlu Su Sprey (Korozyon) Kabini Test Cihazı: İç Hacim: 1200 Lt.; Çalışma Sıcaklığı: Oda sıcaklığı ve + 55 C°. Çalışma Şekli: Bilgisayar Kontrollü
  • Çentik Test Cihazı: BS EN ISO TSE 10045-1, ISO 9854-1-2. V – U Charpy vurma deneyi, İzod vurma deneyi.
  • Mekanik Çekme Test Cihazı: ISO 6892, Çekme, Basma, Bükme, Yükte Bekletme, % Uzama. Termal Kamera ile İzolasyon Kontrolleri. İzolasyon Kontrolleri, sıcaklık dağılımı. Elektrik Güvenliği
  • Leakage Current Tests, Continuity Tests, Resistance Checks: IEC62353, AS/NZS 3551 or AAMI-ANSI ES1

for more information:

Clik to view or PDF brochure for a complete listing: ITU GTTM Test Hizmetlerimiz


Effect of Vibration: Crawling of Cracks – Case of Aloha Airlines Flight 243

Aloha Airlines Flight 243 between Hilo and Honolulu in Hawaii suffered extensive damage after an explosive decompression in flight, on April 28, 1988. The aircraft was a Boeing 737-297. It was able to land safely at Kahului Airport on Maui. There was one fatality a flight attendant was swept overboard.

Fatigue cracks occurred due to disbanding of cold bonded lap joints and hot bonded tear joints in the fuselage panels. This caused the rivets to be over-stressed. A large number of small cracks in the fuselage may have joined to form a large crack. Corrosion was also a related factor.


About Vibration Testing per RTCA-DO160


Robust Vibration Test (Categories R, U, U2)

  • The robust vibration test demonstrates that equipment will operate satisfactorily while being subjected to vibration and that it will continue to operate satisfactorily after being subjected to endurance vibration levels.
  • It combines a demonstration of the equipment functional performance and structural integrity. This test should be performed on all equipment where resistance to effects of long duration exposure to vibration must be demonstrated. The necessity for conducting this test in lieu of the standard vibration test shall be determined by the relevant equipment specification.
  • Categories U and U2 are for equipment to be installed in helicopters with unknown rotor related frequencies.
  • The robust test may or may not represent a service life test. A service life test depends on the vibration environment the equipment is subjected to relative to the test levels.
  • If the vibration environment is known, and the relevant equipment specification requires a service life test, the robust test can be made to represent a service life test by adjusting the test levels and/or the test times using accepted fatigue scaling relationships.

High-Level, Short Duration Vibration Test (Categories H, Z)

  • High-level short duration transient vibration levels are encountered during abnormal fixed wing aircraft vibration conditions that occur during an engine fan blade loss.
  • This test should be applied to equipment in which a functional loss of performance can hazardously affect the aircraft's performance.
  • The Category H test is a generalized test that encompasses all applications. The Category Z test covers restricted low fan frequency applications.
  • These tests do not replace the standard or robust tests.
  • Also see following CAUTION note.

CAUTION: A full analysis of vibration levels related to some specific engine imbalance conditions has not been evaluated against these limits. Therefore this test alone may not be sufficient for some applications without additional test or analysis.




RTCA-DO-160-Vibe Test Categories (from Dr. Cicek's short course training presentations)

RTCA-DO-160-Vibe Test Categories (from Dr. Cicek's short course training presentations)


DrCicek-RTCA-DO-160-Vibration Testing Aircraft Locations (from GDS presentations)

RTCA-DO-160-Vibration Testing Aircraft Locations (from GDS, DrCicek-presentations)




RTCA-DO-160-Standard Random Vibration Test Curve

RTCA-DO-160-Standard Random Vibration Test Curve (from GDS, DrCicek-presentations)




Purpose of the Vibration Tests per DO160

  • These tests demonstrate that the equipment complies with the applicable equipment performance standards (including durability requirements) when subjected to vibration levels specified for the appropriate installation.

Applicable Aircraft:

  • fixed-wing propeller aircraft
  • fixed-wing turbojet, turbofan, and propfan aircraft
  • helicopters.
Dr Cicek - RTCA-DO-160g Training - Vibration Testing Process

RTCA-DO-160G Training - Vibration Testing Process (from Dr. Cicek's short course training presentations)

Standard Vibration Test (Category S)

The standard vibration test for fixed wing aircraft demonstrates that equipment will meet its functional performance requirements in the vibration environment experienced during normal operating conditions of the aircraft.

Effect of Vibration: Crawling of Cracks, Pressurization Cycles

Aircraft fuselages undergo repetitive cycles of differential pressure with each flight. The difference between the cabin and the external ambient pressure is about 6 or 7 psi at an altitude of 36,000 feet.

Note that cabin pressure at high altitudes is maintained at about 75% of sea level pressure, which corresponds to the air pressure at 8000 ft. This is done by pumping air into the cabin. Note that there is some variation in these numbers depending on the aircraft model.

Pressurization cycles along with vibration, corrosion, and thermal cycling can cause fatigue cracks to form and propagate.

1. Case Study: Southwest Airlines Flight 812

Southwest Airlines Flight 812 suffered rapid depressurization at 34,400 ft near Yuma, Arizona, leading to an emergency landing at Yuma International Airport, on April 1, 2011. Inspection of the 5 feet long tear revealed evidence of pre-existing fatigue along a lap joint.

The National Transportation Safety Board has concluded that “the probable cause of this accident was the improper installation of the fuselage crown skin panel at the S-4L lap joint during the manufacturing process, which resulted in multiple site damage fatigue cracking and eventual failure of the lower skin panel.”

2. Landing Gears and Vibrations:

Landing gears are designed to absorb the loads arising from taxiing, take-off, and landing. Hard landing shock is a particular concern. Vibration is another concern. Fatigue cracks can form in the struts and trunnion arms as a results of these loads. Again, corrosion can be a related factor.

2. Exhaust Cracks:


For joining to one of our short course training, including  testing per RTCA-DO-160, or general training on vibration testing, send your email to gemitest@itu.edu.tr.


Short Training Courses at Istanbul Technical University Marine Equipment Test Center

We are ready for supporting you in your product development:

With short courses and training on:

  • Planning and Managing Test Activities per MIL-STD-810G
  • Planning and Managing Test Activities per RTCA-DO-160G
  • Systems engineering: Planning and Managing Projects
  • Vibration Testing
  • R&D projects research, planning, and management of work activities (TÜBİTAK, KOSGEB, SSM, H2020, and other similar funded projects)

Location: Istanbul Tecnical University
Maritme Faculty Campus, Tuzla, Istanbul
Marine Equipment Test Center (METC) or your location if 6 or more trainees are attending.

Main Instructor: Dr Ismail Cicek

For training dates or other information, contact with Alper Seyhan (Research Assistant) via email at gemitest@itu.edu.tr of fill out the form at the bottom of this page.

GDS Engineering Trainign & Consultancy Services

Training & Consultancy Services

We provide training and consultancy services to our sector’s leading organizations with our experience in the following subjects:

  • Product Development
  • Project Management
  • Innovation & Technology Management
  • Military and Civilian Standards for Test and Certification Planning
  • Systems Engineering Strategic Product Development Plan Preparations

We can support you via training courses at Istanbul Technical University Maritime Faculty campus (Tuzla, Istanbul)

or we can be part of your team and transfer our knowledge during your project management.

We are always eager and excited to help you for achieving your goals.

About GDS Engineering R&D

Global Dynamic Systems (GDS) (GDS R&D, Inc.), was established in 2014 to develop high technology products and systems and provide solutions through collaboration with universities, industrial firms and governmental or non-governmental organizations. Our firm focuses on developing products and providing engineering consultancy services within our capabilities. Consisting of 4 PhDs and 2 engineering personnel, we are experienced in product development and research, both in the USA and Turkey.