Latest Space News
Wed, 20 Nov 2019 12:12:33 +0000
Commercial spaceports say they need to become more proactive in dealing with public opposition to proposed launch sites through a combination of education and community involvement. SpaceNews.com
Wed, 20 Nov 2019 10:40:05 +0000
Glavkosmos, the commercial subsidiary of Roscosmos, unveiled a web portal Nov. 20 for Russian rocket and space products. SpaceNews.com
Wed, 20 Nov 2019 09:32:22 +0000
The government of Brazil is ready to move into the next phase of efforts to attract commercial launch business to the country with the ratification of an agreement with the United States. SpaceNews.com
Tue, 19 Nov 2019 20:06:30 +0000
The report titled ”Iran Military Power” is part of a Defense Intelligence Agency effort to inform government leaders and the public on major foreign military challenges. SpaceNews.com
Tue, 19 Nov 2019 18:29:10 +0000
At the Space Tech Expo, space agency leaders said artificial intelligence will play key roles in many space programs of the future. SpaceNews.com
Tue, 19 Nov 2019 18:00:53 +0000
Dawn Harms, the former Boeing Satellite Systems International vice president for global sales and marketing, has joined Momentus to serve as chief revenue officer for the In-space transportation startup. SpaceNews.com
Tue, 19 Nov 2019 17:12:26 +0000
Portugal’s newly created space agency is considering a national constellation focused on maritime activity in the Atlantic Ocean.  SpaceNews.com
Tue, 19 Nov 2019 16:27:10 +0000
China Satcom has filed an insurance claim for the loss of a communications satellite after failing to establish contact with the spacecraft. SpaceNews.com
Tue, 19 Nov 2019 15:58:24 +0000
Rather than waiting for international consensus on measures to mitigate the problem of space debris, space agencies and companies should take immediate action, said Jan Woerner, European Space Agency director general. SpaceNews.com
Tue, 19 Nov 2019 12:26:30 +0000
Boeing said Nov. 18 that a report issued last week by NASA’s Office of Inspector General (OIG) regarding the commercial crew program, including claims that the company considered withdrawing from the program, was inaccurate. SpaceNews.com
Tue, 19 Nov 2019 12:11:16 +0000
Sweden, Germany, Italy, Scotland, Portugal and Norway all have spaceport ideas being discussed, OHB CEO Marco Fuchs said Nov. 19 at Space Tech Expo Europe here. SpaceNews.com
Tue, 19 Nov 2019 11:38:24 +0000
The European Commission is recommending a space budget of 16.2 billion euros ($17.9 billion) for 2021 through 2027, a nearly 50 percent increase over the 11 billion euros budgeted for 2014 through 2020. SpaceNews.com
Tue, 19 Nov 2019 04:50:22 +0000
NASA announced Nov. 18 that it was adding five companies to a contract to perform commercial deliveries of payloads to the surface of the moon, a group that ranges from small ventures to Blue Origin and SpaceX. SpaceNews.com
Mon, 18 Nov 2019 22:42:51 +0000
BREMEN, Germany — FCC Chairman Ajit Pai informed Congress Nov. 18 that the agency will run a public auction of C-band spectrum instead of allowing a consortium of satellite operators to sell it directly to 5G wireless operators.  Satellite operators Intelsat, SES and Telesat, acting as the C-Band Alliance, have been lobbying the Federal Communications […] SpaceNews.com
Mon, 18 Nov 2019 22:26:35 +0000
GAO said in a statement that the agency on Nov. 18 sustained the protest filed by Blue Origin on Aug. 12. SpaceNews.com
Mon, 18 Nov 2019 21:24:39 +0000
Gen. Raymond said U.S. SPACECOM intends to influence DoD's budget priorities SpaceNews.com
Mon, 18 Nov 2019 14:19:48 +0000
Satellite operators Intelsat, SES and Telesat on Nov. 15 detailed how they would calculate the proceeds they have pledged to contribute to the U.S. treasury if the Federal Communications Commission accepts their proposal to privately auction C-band spectrum sought by 5G network operators.  SpaceNews.com
Mon, 18 Nov 2019 10:10:29 +0000
A group of planetary defense advocates is asking European governments to fund a mission to a near Earth asteroid, three years after a similar mission failed to win approval. SpaceNews.com
Sun, 17 Nov 2019 23:42:07 +0000
Maj. Gen. Stephen Whiting said the transfer of space traffic management responsibilities can't happen until Commerce gets the necessary resources. SpaceNews.com
Fri, 15 Nov 2019 22:36:16 +0000
The 10-year contract is for operations and support of the Advanced Extremely High Frequency, Milstar and Defense Satellite Communications System constellations. SpaceNews.com
More space news...
19511 cvs - 671 jobs

LOOKING FOR A JOB?

  • HOME
  • POST YOUR CV
  • JOB SEARCH
  • LOOKING FOR STAFF?

  • HOME
  • REGISTER
  • CV SEARCH
  • POST JOBS
  • CV: Senior Research Engineer

    Printer Friendly


    << BACK

    Personal information
     Name:<withheld>
     Age:<withheld>
     Country:<withheld>
     Location:<withheld>
    Contact information
     Email:<withheld>
     Phone:<withheld>
     Mobile:<withheld>
    Candidate Profile
     Date Submitted:20-03-2014
     Last Modified:26-03-2014 (02:49)
    Job information
     Current job:Senior Research Engineer
     Employment Term:Permanent
     Job location:Anywhere
     Date available:within 2 months
     Industry:,
     KeywordsAstrodynamics, Optimal Control, Trajectory Optimization, Nonlinear Dynamical Systems, Vibrations
    CV

    EDUCATION
    University of Southern California – Los Angeles, CA 90089-1453, USA
    ▪ Ph.D. in Aerospace Engineering (December 2012)
    ◦ Supervisor: Prof. Firdaus E. Udwadia
    ◦ Dissertation: New Approaches to Satellite Formation-Keeping and the Inverse Problem of the Calculus of Variations
    Yonsei University – Seoul 120-749, Republic of Korea
    ▪ M.S. in Astronomy  and Space Science (February 2008)
    ◦ Supervisor: Prof. Sang -Young Park
    ◦ Thesis: Analytic Solutions to Fuel-Optimal Reconfiguration of Satellite Formation Flying
    ▪ B.S. in Astronomy and Space Science (major) and Physics (minor) (February  2006)

    WORK EXPERIENCE
    Samsung Techwin Co., Ltd., Power Systems Division,  Control Group           (March 2013 – )
    –  Gyeonggi-do 463-400, Republic of Korea
    ▪  Works  as  a  senior  research  engineer.  Develops  control  algorithms  for  propulsion  control  and monitoring systems of MUAVs (Medium-altitude Unmanned Aerial Vehicles) together with Korean  Agency  for  Defense  Development.  Main  work  includes  1)  analysis  of  the  control  requirements,  2)  design  of  controllers  using  Matlab/Simulink,  and  3)  verification  of  the designed controllers via software testing and HILS (Hardware-In-the-Loop Simulations).

    JOURNAL PUBLICATIONS
    ▪  Udwadia, F. E., Wanichanon, T., and  Cho, H., “Methodology for Satellite Formation-Keeping in the  Presence  of  System  Uncertainties,”  Journal  of  Guidance,  Control,  and  Dynamics.
    (Accepted for publication)
    ▪  Udwadia,  F.  E.  and  Cho,  H.,  “First  Integrals  and  Solutions  of  Duffing-Van  der  Pol  Type Equations,” Journal of Applied Mechanics, Vol. 81, No. 3, 2014, pp. 034501-1 – 034501-4.
    DOI: 10.1115/1.4024673
    ▪  Cho,  H.  and  Udwadia,  F.  E. ,  “Explicit  Control  Force  and  Torque  Determination  for  Satellite Formation-Keeping  with  Attitude  Requirements,”  Journal  of  Guidance,  Control,  and Dynamics, Vol. 36, No.2, 2013, pp. 589-605.
    DOI: 10.2514/1.55873
    ▪  Udwadia,  F.  E.  and  Cho,  H.,  “Lagrangians  for  Damped  Linear  Multi-Degree-of-Freedom Systems,” Journal of Applied Mechanics, Vol. 80, No.4, 2013, pp. 041023-1 – 041023-10.
    DOI: 10.1115/1.4023019
    ▪  Cho, H., Park, S. –Y., Yoo, S. –M., and Choi, K. –H., “Analytical Solution to Optimal Relocation of  Satellite  Formation  Flying  in  Arbitrary  Elliptic  Orbits,”  Aerospace  Science  and Technology, Vol. 25, No.1, 2013, pp. 161-176.
    DOI: 10.1016/j.ast.2012.01.005
    ▪  Cho,  H.,  Park,  S.  –Y.,  Park,  H.  –E,  and  Choi,  K.  –H.,  “Analytic  Solution  to  Optimal Reconfigurations  of  Satellite  Formation  Flying  in  Circular  Orbit  under  J2  Perturbation,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 48, No. 3, 2012, pp.  2180-2197.
    DOI: 10.1109/TAES.2012.6237587
    ▪  Udwadia,  F. E.,  Leitmann,  G.,  and  Cho,  H.,  “Some  Further  Remarks  on  Hamilton’s  Principle,” Journal of Applied Mechanics, Vol. 78, No. 1, 2011, pp. 011014-1 – 011014-4.
    DOI: 10.1115/1.4002435
    ▪  Cho,  H.  and  Udwadia,  F.  E.,  “Explicit  Solution  to  the  Full  Nonlinear  Problem  for  Satellite Formation-Keeping,” Acta Astronautica, Vol. 67, No. 3-4, 2010, pp. 369-387.
    DOI: 10.1016/j.actaastro.2010.02.010
    ▪  Cho, H.  and Yu, A., “New Approach to Satellite Formation-Keeping: Exact Solution to the Full Nonlinear Problem,” Journal of Aerospace Engineering, Vol. 22, No. 4, 2009, pp. 445-455.
    DOI: 10.1061/(ASCE)AS.1943-5525.0000013
    ▪  Cho, H.  –C.  and  Park, S.  –Y.,  “Analytic Solution for Fuel-Optimal Reconfiguration in Relative Motion,”  Journal of Optimization Theory and Applications, Vol. 141, No. 3, 2009, pp. 495-512.
    DOI: 10.1007/s10957-008-9482-3
    ▪  Cho, H., Park, S.  –Y., and Choi, K. –H., “Application of Analytic Solution in Relative Motion to Spacecraft Formation Flying in Elliptic Orbit,”  Journal of Astronomy and Space Sciences, Vol. 25, No. 3, 2008, pp. 255-266.
    DOI: 10.5140/JASS.2008.25.3.255

    CONFERENCE PRESENTATIONS
    ▪  Cho,  H.,  and  Udwadia,  F.  E.,  (ASME  2012  International  Mechanical  Engineering  Congress  & Exposition,  IMECE  2012,  Houston,  Texas,  November  2012)  Inverse  Problem  for Lagrangian Dynamics for Multi-Degree-of-Freedom Systems with Linear Damping.
    ▪  Udwadia,  F.  E.,  and  Cho,  H.  (The  13 th ASCE  Earth  and  Space  2012  Conference,  Pasadena, California, April 2012) New Solutions to the Exact Formation-keeping Control of Satellites with Attitude Constraints.
    ▪  Cho,  H.,  and  Udwadia,  F.  E.,  (AIAA  SPACE  2011  Conference  &  Exposition,  Long  Beach, California,  September  2011)  New  Approach  to  Formation-Keeping  Problem  of  Multiple Satellites with Attitude Requirements.
    ▪  Wanichanon,  T.,  Cho,  H.,  and  Udwadia,  F.  E., (AIAA  SPACE  2011  Conference  &  Exposition, Long  Beach,  California,  September  2011)  Satellite  Formation-Keeping  Using  the Fundamental Equation in the Presence of Uncertainties in the System.
    ▪  Cho,  H.,  and  Udwadia,  F.  E.,  (Engineering  Mechanics  Institute  (EMI)  2010  Conference,  Los Angeles,  California,  August  2010)  Explicit  Solution  to  Satellite  Formation-Keeping Problem with Attitude Constraints.
    ▪  Cho,  H.,  and  Park,  S.  –Y.,  (The  16th Mediterranean  Conference  on  Control  and  Automation, Corsica,  France,  June  2008)  Simple  Analytic  Solution  to  the  Optimal  Reconfigurations  in General Relative Motions.
    ▪  Cho, H.,  Park,  S.  –Y.,  and  Choi,  K.  –H.,  (The  Annual  Spring  Conference  of  the  Korean  Space Science  Society,  Cheongju,  Rep.  of  Korea,  April  2008)  Simple  Analytic  Solutions  for Optimal Reconfigurations in General Relative Motion.
    ▪  Cho,  H.,  Park,  S.  –Y.,  and  Choi,  K.  –H.,  (The  Annual  Fall  Conference  of  the  Korean  Space Science  Society,  Daegu,  Rep.  of  Korea,  October  2007)  An  Analytic  Solution  to  FuelOptimal  Reconfiguration  of  Satellite  Formation  Flying  in  the  Presence  of  J2  Geopotential Disturbance.
    ▪  Cho, H. –C., Yoo, S. –M., Park, S. –Y., and Choi, K. –H., (The Annual Spring Conference of the Korean  Space  Science  Society,  Busan,  Rep.  of  Korea,  April  2007)  Applications  of Analytical Solutions into Reorienting, Resizing, and Retargeting of Formation Flying.
    ▪  Yoo, S. –M., Cho, H. –C., Park, S. –Y., and Choi, K. –H., (The Annual Spring Conference of the Korean Space Science Society, Busan, Rep. of Korea, April 2007) Numerical Validation of Analytical  Solution to  Optimal  Reconfiguration  of  Satellite  Formation  Flying  in  Arbitrary Elliptical Orbits.
    ▪  Cho,  H.  –C.,  Park,  S.  –Y.,  Yoo,  S.  –M.,  and  Choi,  K.  –H.,  (The  17th AAS/AIAA  Space  Flight Mechanics Meeting, Sedona, AZ, January 2007) Analytical Solution to Optimal Relocation of Satellite Formation Flying in  Arbitrary Elliptical Orbits.

    INVITED TALK
    ▪  Cho,  H.,  and  Udwadia,  F.  E.,  (The  12th ASCE  Earth  and  Space  2010  Conference,  Honolulu, Hawaii,  March  2010)  Explicit  Analytic  Solution  to  the  Satellite  Formation-Keeping Problem.

    COMPUTER SKILLS
    Matlab/Simulink, C/C++, Fortran, LabVIEW, Maple, Mathematica, SolidWorks, Solid Edge, PLC

    FELLOWSHIPS
    ▪ Brain Korea 21 Fellowship, Korean Science and Engineering Foundation, 2006  – 2008
    ▪ National Research Lab Fellowship, Korean Science and Engineering Foundation, 2006 – 2008
    ▪ Academic Excellence Scholarship, Yonsei University, 2005
    ▪ Academic Excellence Scholarship, Yonsei University, 2004

    EXTERNAL REVIEWER  FOR:
    ▪ Journal of Aerospace Engineering (8 papers)
    ▪ Applied Mathematics and Computation (5 papers)
    ▪ Journal of Optimization Theory and Applications (2 papers)
    ▪ ASME Applied Mechanics Reviews (1 paper)
    ▪ Journal of Sound and Vibration (1 paper)

    RESEARCH INTERESTS
    Astrodynamics,  Optimal  Control,  Trajectory  Optimization,  Satellite  Formation  Flying,  Nonlinear Dynamical Systems, Multi-body Dynamics and Control, Linear, Nonlinear, and Random Vibrations, Numerical Integration of Ordinary/Partial Differential Equations

    TEACHING EXPERIENCES
    ▪  Teaching Assistant  for the junior-level  Computer-Aided  Analyses  for Aero-Mechanical Design.
    (Instructor:  Dr.  Yann  Staelens):  Duties  included  grading ,  hands-on  training  of  SolidWorks  and Solid Edge, and holding office hours                                
    (Spring 2011, Spring 2012)
    ▪ Teaching Assistant  for the junior-level Dynamics. (Instructor: Prof. Roger G. Ghanem, Dr. David C. Wilcox): Duties included lectures and holding office hours
    (Spring 2010, Fall 2010, Fall 2011)
    ▪  Teaching  Assistant  for  the  graduate-level  Linear  Control  Systems  II.  (Instructor:  Prof.  Henryk Flashner): Duties included grading, lectures, and holding office hours                      
    (Fall 2009, Fall 2010)
    ▪  Teaching  Assistant  for  the  graduate-level  Engineering  Analytical  Methods.  (Instructor:  Prof. Satwindar S. Sadhal): Duties included grading and holding office hours            
    (Spring 2010)
    ▪  Teaching  Assistant  for  the  graduate-level  Engineering  Analysis.  (Instructor:  Prof.  Charlie Campbell): Duties included grading and holding office hours                       
    (Fall 2009)
    ▪ Teaching Assistant  for the senior-level  Control Systems Laboratory. (Instructor: Dr. Jerry Chen): Duties included grading and holding office hours                                
    (Spring 2009)
    ▪  Teaching  Assistant  for  the  senior-level  Space  Flight  Dynamics.  (Instructor:  Prof.  Sang-Young Park) Duties included grading, lectures, and hands-on training of STK (Satellite Tool Kit®)
    (Spring 2006)

    RESEARCH EXPERIENCES
    University of Southern California, Los Angeles, CA 90089-1453
    ▪  New  methodology  for  satellite  formation-keeping  with  attitude  requirements  in  the  presence  of system uncertainties                                          (August 2008 – May 2012)
    The  purpose  of  this  research  is  to  analytically  develop  exact  formation-keeping  guidance schemes  that  determine  control  inputs  and  state  trajectories  in  the  presence  of  both  orbital  and attitude requirements. The obtained solution is new in that 1) it is assumed that the leader satellite’s reference  orbit  can  be  any  arbitrary  one  and  the  follower  satellites  are  required  to  point  to  an arbitrarily  chosen  specific  spot  in  space  that  may  be  time-varying,  2)  a  method  to  correct  initialcondition  misalignment  problems  due  to  sensor  measurement  noise  is  developed  so  that  both  the orbital  and  attitude  control  requirements  are  asymptotically  satisfied  at  any  desired  rate  of convergence,  and  3)  the  effect  of  model  uncertainties  is  also  considered  by  augmenting  an additional additive controller  based on a generalization of the notion  of sliding surface control.  It should  be  stressed  that  nonlinear  relative  dynamics  is  considered  in  its  entirety  without  any linearizations/approximations  and  the  solution  is  obtained  in  an  explicit  form,  which  shows  the possibility of precisely controlling nonlinear multi-body systems.
    ▪ New approaches to the inverse problem of the calculus of variations                                         (August 2010 – December 2012)
    To develop the equations of motion for a mechanical system, it is usual to define a Lagrangian function first and then obtain the equations of motion by applying the Lagrange equation when the forces are derivable from  a potential function. However, it is interesting  and useful  to  investigate the types of forces that can be engendered when substituting the forces into the Lagrange equation guarantees the proper equations of motion even when the forces do not arise from a potential, that is,  when  they  are  nonconservative.  In  this  inverse  problem   of  the  calculus  of  variations,  by extending  the  existing  Bolza’s  approach,  a  more  general  and  systematic  way  of  handling  the problem  is  found  for  single-degree-of-freedom  (SDOF)  systems.  Then,  new  results  for  linearly damped  multi-degree-of-freedom  (MDOF)  systems  are  obtained  using  extensions  of  results  for SDOF  systems.  Conservation  laws  for  these  damped  MDOF  systems  are  also  found  using  the Lagrangians  obtained,  and  the  first  integrals  and  the  analytical  solutions  of  some  nonlinear oscillators (ex. Duffing-van der Pol oscillator) are newly proposed. These new findings can be used for development of  approximate solutions of nonlinear differential equations or various numerical techniques.
    Yonsei University, Seoul 120-749, Republic of Korea
    ▪ Analytical analysis of fuel-optimal reconfiguration of formation flying   (Sponsor: Korean Science and Engineering Foundation)                        (March 2006 – July 2008)
    The problem of relative motion, formation flying, and rendezvous has been studied.  The  most significant advantage of the research has been the development of completely analytical  results, by use  of  the  Fourier  series  and  the  Pontryagin’s  minimum  principle.  The  major  contributions  have been  the  solutions  to  the  fuel-optimal  rendezvous  problem  for  satellite.  The  results  are  also  valid when the orbits of the satellites are non-circular with arbitrary eccentricity. The  J2-perturbed case has been  also considered.  These findings allow  us to  predict the form  of the optimal solutions in advance  without having  to  solve  the  problem  and  significantly  reduce  the  amount  of  calculations required.


    Registering is the only way of posting vacancies and obtaining contact details of candidates in our CV database.

    All it takes is a few minutes and a credit card (Visa or American Express). To sign-up to this service, simply click on the Register link and fill in the form. You will then have instant access to our system after on-line payment where you will be able to complete the transaction in either US Dollars, UK Pounds or Euros.

    All online credit/debit card transitions are handled through our secure third party payment processors at WorldPay. Worldpay are part of The Royal Bank of Scotland Group, the 5th biggest banking group in the world, WorldPay payment solutions are trusted by thousands of businesses, big and small worldwide. 

    Pricing starts at €450 (approx £400 or US$500 - use the convert tool for an exact conversion) for one month unlimited job postings and unlimited CV database access (for one user), with package discounts available if you have more permanent recruiting needs. For example, a Gold subscription will give you unlimited jobs posting and unlimited CV database access for one year at just over €250 per month!

     

    2018 Pricing Structure (excluding VAT):

    1 month - Discovery 450 euros convert
    3 months - Bronze 1150 euros convert
    6 months - Silver 1950 euros convert
    12 months - Gold 3200 euros convert

     

    If online payment is not convenient, give us a call at +33(0)622757477 or send us an email at sales@space-careers.com. We will set up an account for you and invoice you. Note that you can also pay through PayPal.

     

    Subscriptions

     

    Please note that the posting of academic positions is free of charge. All you need to do is email us your job description and we will post it for you.

     

    VAT:

    Spacelinks is based in France so the following European Union regulations regarding electronic commerce apply:
    - if your business is located outside the EU, VAT does not apply to you
    - if your business is located in France, you will be charged a 20% VAT
    - if your business is located in the EU and you don't have a valid VAT registration number, you will be charged a 20% VAT
    - if your business is located in the EU and you do have a valid VAT registration number, you won't be charged VAT provided you give us your VAT number (mandatory for invoicing)

     

    Support:

    For sales enquiries and general information, you can call us on +33(0)622757477.
    Support is available Mon-Fri on +33(0)622757477 or via email. Out-of-hours support is provided only via email.

    Please also note that we are located in France. Our normal office hours are 09:00 to 18:00 Monday to Friday. France timezone is GMT+1.

     

    Warning:

    We are very serious about our job seekers privacy so only legitimate recruiters and employers are eligible for a recruiter account. All subscriptions requests will be manually approved and recruiter accounts constantly monitored. Users who enter inaccurate or incomplete information will not gain access to post jobs or search resumes. Sharing of login details with a third party will result in the suspension of the recruiter's account with no subscription refund.

    To ensure you are approved, please include the following on your application:
    * The website address of your Company. Under construction websites will be rejected.
    * Email - Must end in @yourcompany.com. Applications using free email accounts such as Hotmail, Yahoo or Gmail will be rejected.

    Individual exceptions can be made on a case by case basis by emailing sales@space-careers.com. Accounts found not to be in compliance will be deleted.

     
    Terms & ConditionsCopyright ©2019 Spacelinks
    Web Analytics