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Internal Research Fellow PostDoc in AOCS and Pointing Systems

2017-09-20 17:12:14| Space-careers.com Jobs RSS

Research Fellow opportunity in the Directorate of Technology, Engineering and Quality. ESA is an equal opportunity employer, committed to achieving diversity within the workforce and creating an inclusive working environment. Applications from women are encouraged. Post Internal Research Fellow PostDoc in AOCS and Pointing Systems This post is classified F2 on the Coordinated Organisations salary scale. Location ESTEC, Noordwijk, The Netherlands Description Within the Systems Department, the GNC, AOCS and Pointing Division is responsible for Engineering and research and development of Attitude and Orbit Control Systems AOCS for satellites including Failure Detection Isolation Recovery FDIR Engineering and research and development of Guidance, Navigation and Control GNC systems for space vehicles including interplanetary cruise, aero assistance, precision landing, ascent, rendezvous and docking, reentry, formation flying and dragfree systems Technology development for AOCS and GNC sensors Endtoend engineering and research and development on high pointing accuracy systems Research and development of advanced control, estimation optimisation techniques and tools Development of control engineering standards in the frame of ECSS and ESA Standardisation Boards. Within the Division, the AOCS and Pointing Systems Section is specifically in charge of Designing and implementing Attitude and Orbit Control Systems AOCS for satellites and highaccuracy Pointing Systems Proposing and managing Mission Enabling Technology RD activities in the following areas Generic AOCS architecture Building Blocks Competitive Earth Observation, Telecom, Science AOCS associated FDIR High accuracy pointing Systems Technology development for AOCS sensors and electromagnetic actuators Research and development of advanced control techniques and tools Defining, maintaining and operating the necessary computing and laboratory facilities in support of the above activities. The section objectives more particularly related to the proposed Research Fellowship activities are highlighted in bold in the above list. Interested candidates are highly encouraged to visit the ESA website www.esa.int Fields of activitiesresearch Experimental validation of advanced active microvibration mitigation strategies. Attaining high pointing stability performance is a critical objective for many current and future space missions. As lineofsight stability requirements get tighter, mechanical vibrations become one of the key performance limiting factors. Commonly termed microvibrations, these lowamplitude disturbances span a wide frequency range from few Hz up to 1 kHz and are produced by a variety of mechanical and electrical spacecraft systems. Microvibrations can propagate, through the structure of the spacecraft, towards the various optical or communication systems severely degrading their performance. It is critical for mission success to design adequate vibration isolation systems that can minimize their impact. Pure passive isolators, such as the ones based on elastomeric materials, are the current baseline for microvibration mitigation to dampen highfrequency perturbations. Yet, passive isolation methods are limited in the lower part of the microvibration range and can be insufficient in terms of isolation performance. In order to overcome the frequency limitations of a purely passive approach and achieve broadband vibration isolation, the proposed research will focus on the design of a complementary active control strategy that primarly targets the lower range of the frequency perturbations such as the ones introduced by reaction wheels. In order to precisely tune these control strategies and guarantee both compliance with the mission pointing stability requirements and also safeguard against potential uncertainties or faults, accurate dynamic models of the endtoend system must be obtained. Mathematical models that reflect both the driving physical phenomena as well as uncertainties present in the system will be established and validated along the project. These models will supplement nonlinear simulations and capture the complex dynamic interactions between the microvibration sources, the isolation system, the spacecraft structural dynamics and the optical payload system. With this knowledge, a second objective of the study is to demonstrate the capabilities of a common unified framework in which system design, robust controller synthesis, parametric sensitivity and worstcase analysis can be rigorously performed using a common set of wellestablished mathematical tools. These analytical tools provide strong stability and endtoend performance guarantees in the face of uncertainty without relying on timeconsuming Monte Carlo simulations. In a natural way, adaptive control solutions with guaranteed stability and performance margins will be obtained by design. Finally, the project will lead to the development of an advanced experimental testbed that will serve as a validation platform for future microvibration control and high pointing stability research activities. Research Programme Specifics The Research Fellowship programme of work would be the following YEAR 1. Detailed problem Formulation, Requirements Capture, Model Identification and Setup of the Simulation and Experimental Platforms, Preliminary Controller Synthesis a Development of the simulation environment SimMechanics capturing the relevant dynamics of the experimental platform b From the physical high fidelity E2E model perform the derivation of adequate analysis and synthesis models that capture model uncertainties using a linear fractional representation c Model identification, validation and uncertainty quantification based on experimental results shall be performed via an experimental system identification campaign d Definition of performance and robustness objectives based on the physical limitations of the system. e Setup of the IQC robust analysis framework to validate and verify a given control law. f Baseline controller synthesis, experimental validation and comparative analysis of a series of classical vibration control algorithms. YEAR 2. Advanced Controller Synthesis and Fault Tolerant Design a development of modern robust control design methodology in order to synthesize a family of adaptive highperformance controllers for different levels of uncertainty b experimental demonstration and validation of the robust control laws for the plant subjected to different parametric variations. c Addition of Fault tolerant capabilities to the system. Implementation of FDI and reconfiguration mechanisms. Technical competencies Ability to conduct research autonomously Breadth of exposure coming from past andor current researchactivities Researchpublication record Knowledge relevant to the field of research Interest in space and space research Ability to gather and share relevant information Behavioural competencies Innovation Creativity Continuous Learning Self Motivation Communication Problem Solving Relationship Management CrossCultural Sensitivity Education Applicants must have recently completed, or be close to completion of a PhD in a related technical or scientific discipline, preferably Control Engineering. Preference will be given to applications submitted by candidates within five years of receiving their PhD. Additional requirements Applicants should have good analytical skills and be able to work in a multicultural environment in an autonomous manner. Applicants should have a methodical approach to their work and the ability to clearly document their work and results. The working languages of the Agency are English and French. A good knowledge of one of these is required. Knowledge of another Member State language would be an asset. Other information For behavioural competencies expected from ESA staff in general, please refer to the ESA Competency Framework. The Agency may require applicants to undergo selection tests. The closing date for applications is 18 October 2017. In addition to your CV and your motivation letter, please add your proposal of no more than 5 pages outlining your proposed research. Candidates must also arrange for three letters of reference to be sent by email, before the deadline, to temp.htresa.int. The letters must be sent by the referees themselves. The candidates name must be mentioned in the subject of the email. If you require support with your application due to a disability, please email contact.human.resourcesesa.int. Please note that applications are only considered from nationals of one of the following States Austria, Belgium, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Luxembourg, the Netherlands, Norway, Poland, Portugal, Romania, Spain, Sweden, Switzerland, the United Kingdom and Canada and Slovenia as well as Bulgaria, Cyprus, Latvia, Lithuania, Slovakia as European Cooperating States ECS. Priority will first be given to candidates from underrepresented Member States. In accordance with the European Space Agencys security procedures and as part of the selection process, successful candidates will be required to undergo basic screening before appointment Apply HERE

Tags: research systems internal fellow

Internal Research Fellow PostDoc in modelbased Verification Validation of autonomous systems

2017-09-20 17:12:14| Space-careers.com Jobs RSS

Tags: research systems internal fellow

Internal Research Fellow PostDoc in Radiation Hardness Assurance processes for COTS EEE Components

2017-09-20 17:12:14| Space-careers.com Jobs RSS

Research Fellowship opportunity in the Directorate of Technology, Engineering and Quality. ESA is an equal opportunity employer, committed to achieving diversity within the workforce and creating an inclusive working environment. Applications from women are encouraged. Post Internal Research Fellow PostDoc in Radiation Hardness Assurance processes for COTS EEE Components This post is classified F2 on the Coordinated Organisations salary scale. Location ESTEC, Noordwijk, The Netherlands Description The Component Materials Physics Chemistry Evaluation Standardisation Division, within the Product Assurance and Safety Department, is responsible for the evaluation, qualification and standardisation of Electrical, Electronic and Electromechanical EEE Components and Materials used in ESA spacecraft and Standardisation Activities. The division provides direct and indirect engineering and product assurance support to ESA projects and the European Space Industry. The work of the division covers a broad range of engineering and management activities via the reliability assessment of existing and new component technologies and part types, the definition of test standards and test methods, development of application and procurement requirements, technology and component development support, reverse engineering and failure analysis performed in a state of the art onsite laboratory including radiation test facilities and delivery of data to end users via public and restricted websites and databases. The focus is on the effects of exposure to the space environment such as vacuum, temperature, particles, ionising and nonionising radiation. Interested candidates are highly encouraged to visit the ESA website. Fields of activitiesresearch Overview of the field of research proposed Introduction EEE components flown on ESA spacecraft have to operate in the inhospitable space environment. An important part of this environment of concern to electronic components is the space radiation environment. The space radiation environment is composed of a large variety of particles with a complex energy spectrum. Particles of concern are electrons, protons and heavier ions. These particles may adversely affect electronic components via cumulative effects or transient effects. In the worst case, an electronic component may exhibit a catastrophic failure when exposed to the space radiation environment. Various Radiation Hardness Assurance processes are applied to ensure suitability of EEE components for flight on ESA spacecraft. These include Radiation screening characterisation Radiation evaluation qualification Radiation hardening work Development of irradiation test methods Development of Radiation Hardness Assurance standards Radiation Hardness Assurance also includes work in the field of dosimetry, inflight EEE component radiation experiments, inflight anomaly investigation, work at particle accelerator irradiation test facilities, etc. Research area Specific research area concerns improvement of the understanding of the Radiation Hardness Assurance processes for CommercialOffTheShelf COTS EEE Components for Total ionizing Dose, Displacement Damage and Single Event Effects. This involves the characterisation of various EEE components during and after irradiation tests with the objective to improve existing methodologies and possibly to demonstrate new approaches. The research area also includes development of InFlight Cubesat payload experiments in the area of Radiation Hardness Assurance Verification. These experiments aim at measuring EEE Component performance when exposed to the natural space radiation environment. Technical competencies Ability to conduct research autonomously Breadth of exposure coming from past andor current researchactivities Researchpublication record Knowledge relevant to the field of research Interest in space and space research Ability to gather and share relevant information Behavioural competencies Innovation Creativity Continuous Learning Relationship Management Self Motivation Communication Problem Solving CrossCultural Sensitivity Education Applicants should have recently completed, or be close to completion of a PhD studies in electronics or physics. Preference will be given to applications submitted by candidates within five years of receiving their PhD. Additional requirements The applicant shall have a good knowledge of electronics hands on experience with test setup and electrical parameter measurements. An understanding of radiation effects in semiconductors and solid state physics is advantageous. Applicants should have good analytical skills and be able to work in a multicultural environment, both independently and as part of a team. The working languages of the Agency are English and French. A good knowledge of one of these is required. Knowledge of another Member State language would be an asset. Other information For behavioural competencies expected from ESA staff in general, please refer to the ESA Competency Framework. The Agency may require applicants to undergo selection tests. The closing date for applications is 18 October 2017. In addition to your CV and your motivation letter, please add your proposal of no more than 5 pages outlining your proposed research. Candidates must also arrange for three letters of reference to be sent by email, before the deadline, to temp.htresa.int. The letters must be sent by the referees themselves. The candidates name must be mentioned in the subject of the email. If you require support with your application due to a disability, please email contact.human.resourcesesa.int. Please note that applications are only considered from nationals of one of the following States Austria, Belgium, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Luxembourg, the Netherlands, Norway, Poland, Portugal, Romania, Spain, Sweden, Switzerland, the United Kingdom and Canada and Slovenia as well as Bulgaria, Cyprus, Latvia, Lithuania, Slovakia as European Cooperating States ECS. Priority will first be given to candidates from underrepresented Member States. In accordance with the European Space Agencys security procedures and as part of the selection process, successful candidates will be required to undergo basic screening before appointment Apply HERE

Tags: research internal components processes

Internal Research Fellow PostDoc in Life and Physical Sciences

2017-09-20 17:12:14| Space-careers.com Jobs RSS

Research Fellowship opportunity in the Directorate of Technology, Engineering and Quality. ESA is an equal opportunity employer, committed to achieving diversity within the workforce and creating an inclusive working environment. Applications from women are encouraged. Post Internal Research Fellow PostDoc in Life and Physical Sciences This post is classified F2 on the Coordinated Organisations salary scale. Location ESTEC, Noordwijk, The Netherlands Description The Mechatronics and Optics Division provides engineering support for space projects and executes technology developments in the areas of automation and robotics, mechanisms, life and physical science instrumentation, optics and optoelectronics. The Life Support Physical Sciences Instrumentation Section is the centre of competence of the Agency in areas related to instrumentation development for gravityrelated experiments and exploration, ECLS design, engineering and verification. It provides support to projects, preparatory programmes and technology programmes. Within this framework, the Life Support and Physical Sciences Instrumentation Section is in charge of instrument development for microgravity and exploration. Interested candidates are encouraged to visit the ESA website related to the Divisions activities. Fields of activitiesresearch The selected candidate will work on the 3D imaging of living cell dynamics under changed gravity conditions. The Large Diameter Centrifuge LDC at ESAESTEC offers a versatile and unique experimental environment and is the ideal infrastructure to study the influence of hypergravity on physical and biological systems. The LDC can accommodate different equipment for experiments as well as large specimen batches. A newly developed Light Sheetbased Fluorescence Microscope LSFM provides the possibility to examine living systems in this environment. The microscope is integrated into the LDC and available for imaging threedimensional cell cultures, such as human pancreas organoids hPOs, under hyperg conditions. The main focus of the Research Fellow will be on this topic. In parallel to the hyperg experiments with the LDC, simulated g exposure of the cell cultures e.g.hPOs shall also be conducted using the equipment available in the ESAESTEC Life Physical Sciences Laboratory, in particular the Full Size Random Positioning Machine RPM as well as the clinostats. Also 1g reference cultures will need to be kept. Technical competencies Ability to conduct research autonomously Breadth of exposure coming from past andor current researchactivities Knowledge relevant to the field of research Interest in space and space research Ability to gather and share relevant information Researchpublication record Behavioural competencies Innovation Creativity Continuous Learning Self Motivation Communication Problem Solving Relationship Management CrossCultural Sensitivity Education Applicants should have recently completed, or be close to completion of a PhD in physics, chemistry, biology or a related field and have prior experience relevant to the field of research. Preference will be given to applications submitted by candidates within five years of receiving their PhD. Additional requirements The Research Fellow must be able to work in a team with other international investigators in the spirit of positive cooperation and, at the same time, be capable of working autonomously in hisher area of research. At the end of the fellowship, the Research Fellow will be required to summarize the work completed so that it can be included in papers to be submitted to specialized conferencesjournals. The working languages of the Agency are English and French. A good knowledge of one of these is required. Knowledge of another Member State language would be an asset. Other information For behavioural competencies expected from ESA staff in general, please refer to the ESA Competency Framework. The Agency may require applicants to undergo selection tests. The closing date for applications is 18 October 2017. In addition to your CV and your motivation letter, please add your proposal of no more than 5 pages outlining your proposed research. Candidates must also arrange for three letters of reference to be sent by email, before the deadline, to temp.htresa.int. The letters must be sent by the referees themselves. The candidates name must be mentioned in the subject of the email. If you require support with your application due to a disability, please email contact.human.resourcesesa.int. Please note that applications are only considered from nationals of one of the following States Austria, Belgium, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Luxembourg, the Netherlands, Norway, Poland, Portugal, Romania, Spain, Sweden, Switzerland, the United Kingdom and Canada and Slovenia as well as Bulgaria, Cyprus, Latvia, Lithuania, Slovakia as European Cooperating States ECS. Priority will first be given to candidates from underrepresented Member States. In accordance with the European Space Agencys security procedures and as part of the selection process, successful candidates will be required to undergo basic screening before appointment Apply HERE

Tags: life research internal physical

Internal Research Fellow Postdoc in OnBoard Data Processing

2017-09-20 17:12:14| Space-careers.com Jobs RSS

Research Fellow opportunity in the Directorate of Technology, Engineering and Quality. ESA is an equal opportunity employer, committed to achieving diversity within the workforce and creating an inclusive working environment. Applications from women are encouraged. Post Internal Research Fellow Postdoc in OnBoard Data Processing This post is classified F2 on the Coordinated Organisations salary scale. Location ESTEC, Noordwijk, The Netherlands Description Onboard payload data processing work is based in the OnBoard Payload Data Processing Section in the Data Systems and Microelectronics Division at ESTEC. Our competences include Data processor architectures Data acquisition chains High speed onboard networks Digital signal processing, processors and specialised devices Payload data storage Image and signal processing algorithms Data compression techniques High rate data encryption As part of ESAs Directorate of Technical and Quality Management, the Section provides technical support in its domain of competence to all programme directorates in order to support their missions and developments. The Section is also responsible for initiation and execution of technology developments that may lay the foundation for future missions. This comprises developments in analogue and digital hardware from components to subsystems and building blocks, lowlevel software and novel signal processing techniques. In particular, the Section hosts the centre of expertise for data compression algorithms, techniques and devices. It has initiated the development and standardisation of SpaceWire and SpaceFibre links, nodes and networks which have become very widely used not only in nearly all European space missions but also in the US, Japan, Russia and around the world. Interested candidates are encouraged to visit the ESA website for more information regarding the Divisions activities. Fields of activitiesresearch This research fellow position provides an opportunity for interested researchers to enhance the understanding of how reconfigurable spacequalified and COTS FPGAs, such as Microsemi RTG4 flashbased, Xilinx Virtex Zynq and ESAs BRAVE SRAMbased, can be implemented in current and future on board data processing units in an efficient way. While the fault tolerance of such devices is a rich research topic on its own, the research will be focused on how these devices are best used from a system engineering perspective, including The upload of full bitstreams to the spacecraft and the partial patching of bitstreams, including an investigation of possible compression schemes for interplanetary missions with lowspeed upload data rates The storage of bitstreams in memory, including an analysis of the optimal location and the required mechanisms e.g. to load the bitstream from a mass memory unit to the working memory of the payload instrument, to verify the correctness of the transfer and to execute scrubbing of the memory, if required The full and depending on the device technology partial configuration of the FPGA depending on mission phases or processing tasks to be performed. This crucial step requires special attention to ensure that neither the device itself nor any attached device is harmed due to a faulty configuration. An analysis should show up potential risks e.g. accidentally reprogrammed InputOutput blocks and suggest fault isolation schemes on unit level Even if it is known that the bitstream is downloaded correctly to the FPGA device, it would be interesting to execute some basic hardware validation before operation. For instance, the implemented hardware could be tested in flight, by stimulating it with test vectors on its inputs and by comparing its outputs to a known signature. It could be researched how to store and compress the vectors efficiently and how to write and read them tofrom the device JTAG boundary scan, NAND tree etc. A boot loader concept that implements similar to a software boot loader TMTC functionality to execute the abovementioned steps upload, download, decompression, memory copy, memory verification, full and partial reconfiguration of the FPGA, verification of correct functionality of the FPGA. The boot loader should also take into account i systems with multiple FPGAs, and ii systems that use the FPGAs as accelerators i.e. that want to dynamically request the installation of new hardware blocks from a main software running on a microprocessor. A tradeoff study could reveal the pros and cons of implementing this boot loader i external to the instrument, e.g. within the onboard computer, ii within the instrument in a dedicated microprocessor and iii even within the FPGA itself in either a hard or soft microprocessor. Technical competencies Ability to conduct research autonomously Breadth of exposure coming from past andor current researchactivities Researchpublication record Knowledge relevant to the field of research Interest in space and space research Ability to gather and share relevant information Behavioural competencies Innovation Creativity Continuous Learning Self Motivation Communication Problem Solving Relationship Management CrossCultural Sensitivity Education Applicants should have recently completed, or be close to completion of a PhD in electrical engineering, preferably with a background in Field Programmable Gate Arrays FPGAs. Preference will be given to applications submitted by candidates within five years of receiving their PhD. Additional requirements The working languages of the Agency are English and French. A good knowledge of one of these is required. Knowledge of another Member State language would be an asset. Other information For behavioural competencies expected from ESA staff in general, please refer to the ESA Competency Framework. The Agency may require applicants to undergo selection tests. The closing date for applications is 18 October 2017. In addition to your CV and your motivation letter, please add your proposal of no more than 5 pages outlining your proposed research. Candidates must also arrange for up to three letters of reference to be sent by email, before the deadline, to temp.htresa.int. The letters must be sent by the referees themselves. The candidates name must be mentioned in the subject of the email. If you require support with your application due to a disability, please email contact.human.resourcesesa.int. Please note that applications are only considered from nationals of one of the following States Austria, Belgium, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Luxembourg, the Netherlands, Norway, Poland, Portugal, Romania, Spain, Sweden, Switzerland, the United Kingdom and Canada and Slovenia as well as Bulgaria, Cyprus, Latvia, Lithuania, Slovakia as European Cooperating States ECS. Priority will first be given to candidates from underrepresented Member States. In accordance with the European Space Agencys security procedures and as part of the selection process, successful candidates will be required to undergo basic screening before appointment Apply HERE

Tags: data research internal processing

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Internal Research Fellow PostDoc in AOCS and Pointing Systems

2017-09-20 17:12:14| Space-careers.com Jobs RSS

Internal Research Fellow PostDoc in modelbased Verification Validation of autonomous systems

2017-09-20 17:12:14| Space-careers.com Jobs RSS

Internal Research Fellow PostDoc in Radiation Hardness Assurance processes for COTS EEE Components

2017-09-20 17:12:14| Space-careers.com Jobs RSS

Internal Research Fellow PostDoc in Life and Physical Sciences

2017-09-20 17:12:14| Space-careers.com Jobs RSS

Internal Research Fellow Postdoc in OnBoard Data Processing

2017-09-20 17:12:14| Space-careers.com Jobs RSS

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