Cost estimation and management control of software development in scientific/technical projects

Cost estimation of software development.and the monitoring and control of factors which affect the development cost is difficult due to the lack of uniformity in the development approach, to the lack of a standard terminology and due to the limited and difficult to access cost data bases. This report presents a cost estimation approach, together...

In-orbit experiment with an attitude control algorithm for ANS based on modern control principles

The existing fine attitude system of the Astronomical Netherlands Satellite was designed on the basis of conventional digital control techniques. The possibility of a more advanced approach is presented in this report. As an example, an alternative control algorithm for the scan mode has been developed with the use of state estimation and state...