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Prins, J.J.M. (author)
Sloshsat FLEVO is a mini satellite for the study of liquid dynamics and liquid management problems in space. The behavior of water in an instrumented tank in the satellite will be monitored to help understand how sloshing affects the attitude and orbit control of space vehicles. The micro-gravity disturbance by liquid in a tank is determined as...
report 2000
document
Pronk, Z. (author), Prins, J.J.M. (author)
The purpose of this document is to identify applications for the European Real-time Operations Simulator, EuroSim. First, the document provides an overview of the functional capabilities of the EuroSim. An executive summary of the EuroSim tool is given dealing with what it is, its current status, and what it will become. A list of possible...
report 1996
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Guelman, M. (author), Roefs, H.F.A. (author), Prins, J.J.M. (author), Philippe, C. (author)
Currently planned and future space missions impose increasingly demanding stability and pointing requirements on spacecraft systems. Perturbations due to large amounts of liquids on board cannot be ignored. The ability to understand, predict and control the dynamics of the moving liquid is essential. At NLR, both numerical and experimental...
report 1994
document
Prins, J.J.M. (author)
With a set of linear accelerometers in a particular configuration, it is possible to measure angular velocity and linear and angular acceleration of the body the sensors are attached to. In this report the performance of a sensor system of this type, the so-called ballistometer, is studied in some detail. In particular, the sensitivity to sensor...
report 1993
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Prins, J.J.M. (author), Vreeburg, J.P.B. (author)
Responding to the 'Call for Proposals for the In-Orbit Technology Demonstration Programme, Phase 2 (TDP2)' of the European Space Agency (ESA), the Dutch National Aerospace Laboratory (NLR) submitted a plan for the realisation of the 'Slosh Orbital Test Facility (STOF)'. This proposal describes a small free flying spacecraft that will be ejected...
report 1992
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Pronk, C.N.A. (author), Prins, J.J.M. (author), Dupont, J.L. (author), Simkens, P. (author), Plas, J.J.R. (author), Uittenboogaard, A. (author)
report 1992
document
Prins, J.J.M. (author)
The features of a small spacecraft, Sloshsat, with instrumentation for motion diagnosis are described in Part I of this report. The spacecraft is the basic component of the Slosh Test Orbital Facility, STOF, a project submitted for realization in the ESA Technology Demonstration Programme, Phase 2. STOF has the growth potential for becoming a...
report 1991
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Prins, J.J.M. (author), Dieleman, P. (author), van Woerkom, P.T.L.M. (author)
The Hermes manipulation system (HERA) is a sophisticated space manipulator system, which has to perform tasks ranging from berthing to tool operation in various operational modes from fully automatic to purely manual. Development and qualification of such a space-based manipulator must be supported by computer simulation facilities. The HERA...
report 1989
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Prins, J.J.M. (author), Dieleman, P. (author), de Jong, H. (author)
The Hermes manipulation system (HERA) is a sophisticated space manipulator system, which has to perform tasks ranging from berthing to tool operation in various operational modes from fully automatic to purely manual. The HERA system main contractor is Fokker Space & Systems B.V. (FSS). Development and qualification of such a space-based...
report 1989
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Prins, J.J.M. (author), Dieleman, P. (author), Hoogstraten, J.A. (author)
The Hermes Manipulation System (HERA) will be an important part of the Hermes space plane system. The HERA is a sophisticated space manipulator system, which has to perform tasks ranging from capture and berthing to tool operation in various operational modes from fully automatic to purely manual. The HERA system main contractor is Fokker Space ...
report 1987
document
Prins, J.J.M. (author), Pronk, C.N.A. (author)
In the framework of ESA's Columbus programme, Europe has to master new space operations such as remotely and/or automatically controlled rendezvous and docking (RVD) and manipulation. The need for a test bed for development and verification of the critical proximity operations involved was identified. This report presents the results of a study...
report 1985
document
Prins, J.J.M. (author)
In the framework of ESA's Columbus programme, Europe has to master new space operations such as remotely and/or automatically controlled rendezvous and docking (RVD) and manipulation. The need for a test bed for development and verification of the critical proximity operations involved was identified. This report presents the results of a study...
report 1985
document
Prins, J.J.M. (author), Pronk, C.N.A. (author)
In the framework of ESA's Columbus programme, Europe has to master new space operations such as remotely and/or automatically controlled rendezvous and docking (RVD) and manipulation. The need for a test bed for development and verifcation of the critical proximity operations involved was identified. This report presents the results of a study...
report 1985
document
Prins, J.J.M. (author), Pronk, C.N.A. (author)
In the framework of ESA's Columbus programme, Europe has to master new space operations such as remotely and/or automatically controlled rendezvous and docking (RVD) and manipulation. The need for a testbed for development and verification of the critical proximity operations involved was identified. This report presents the results of a study...
report 1985
document
Prins, J.J.M. (author), Pronk, C.N.A. (author)
In the framework of ESA's Columbus programme, Europe has to master new space operations such as remotely and/or automatically controlled rendezvous and docking (RVD) and manipulation. The need for a testbed for development and verification of the critical proximity operations involved was identified. This report presents the results of a study...
report 1985
document
Prins, J.J.M. (author)
The testing of Spacecraft Attitude and Orbit Control Subsystems is described from the early design up to in-flight, inclusive. Main topics dealt with are: description of three generic AOCS test classes, model philosophy, standardization, subsystem static test methods, subsystem dynamic test methods, generic test equipment and test facilities....
report 1984
document
Bosgra, J.A. (author), Prins, J.J.M. (author)
The first part of the paper presents the results of measurements on torque and force irregularities of running reaction wheels. Six different, current technology European wheels, both with ball- and magnet bearings, and with d.c. and a.c. drive motors are examined. Time-domain behaviour around zero wheel speed as well as noise at certain...
report 1982
document
Prins, J.J.M. (author)
Torque and force irregularities of running reaction wheels were studied. In this first part of the study report results from noise measurements at constant wheel speeds on various types of current technology European reaction wheels, both with ball- and magnet bearings and with DC or AC drive motor, are presented. The measured noise in radial...
report 1982
document
Prins, J.J.M. (author)
The increasing power of on-board processors allows more freedom in the design and operation of reaction wheel control systems. This report discusses several performance and implementation aspects of the operation of wheel systems which have their own internal feedback control system. A model following control concept is found to be superior. The...
report 1982
document
Prins, J.J.M. (author)
report 1977
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