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We describe a framework for constructing an IV&V case, which is an expanded safety case, in order to applyIndependent Verification and Validation (IV&V). The objectivesof IV&V at the Japan Aerospace Exploration Agency (JAXA) areto reduce and explain the risks of products. Although a safety caseis a useful framework to explain the risks to customers, virtuallyall past studies...
In this report, we consider the optimal control problems of the nonlinear system with state constraints in the design specifications. We design nonlinear feedback controllers to satisfy the state constraints without changing performance within the constraints by adding nonlinear weighting functions that take effect only when the state is out of the desirable bounds. We propose a method to design nonlinear...
As various kinds of domestic electrical goods and office automation equipment have become more widely used, interference from harmonic currents, which are generated from home appliances, has become a problem. Therefore, A power factor correction, PFC, converter has been developed to reduce harmonic currents. In this paper, suitable for a single-phase sinusoidal current input converter. This method...
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