The key driver method

This chapter is a re-worked version of a paper for the International Conference on System Engineering and Applications (ICSSEA) 2006

Threads of Reasoning: A Case Study in Printer Control

Contains fulltext : 35189.pdf (preprint version ) (Open Access

Threads of Reasoning: A Case Study in Printer Control

Contains fulltext : 35189.pdf (preprint version ) (Open Access

Modeling of performance

Contains fulltext : 35659.pdf (publisher's version ) (Closed access

Threads of reasoning : a case study in printer control

Abstract. In the design of technology intensive products like copiers, wafer steppers and televisions, one searches for a product that satisfies the product requirements as well as the business drivers. The main need in an early design phase is to bring structure in the typical chaos of uncertainty and the huge amount of realization options present. Potential realization choices all have advantages and disadvantages, which cause tensions and conflicts. The earlier the (essential) conflicts and tensions are identified, the better it is. Turning them from implicit to explicit helps the system architect in making the trade-off consciously or at least in selecting the most important tensions and conflicts that require further in-depth investigation. In this respect we demonstrate the effectiveness of a technique called "threads of reasoning". The illustrative case study is the design of the paper flow control (sensors, actuators, control architecture, etc.) in a high-volume copier/printer

Parameterized Iterative Learning Control: Application to a wide format inkjet printer

In this paper, a new Parameterized Iterative Learning Controller (PILC) is discussed. A fixed structure feedforward controller is put into a setting for iterative learning control and adapted to work in a repetitive environment. The fixed structure keeps the number of inline calculations low and enables proper adjustment to changing tasks. Within the ILC setting, suitable compensations can be found in a variable environment and specific penalties can be given to errors in trial domain. Further, by taking into account possible interaction between the trials, the PILC works properly with changing initial conditions over the trials. Successful implementation of the PILC on the carriage of a professional wide format inkjet printer shows its practical applicability

Threads of Reasoning: A Case Study

Copyright © 2006 by J.H. Sandee. Published and used by INCOSE with permission. Abstract. In the design of technology intensive products like copiers, wafer steppers and televisions, one searches for a product that satisfies the product requirements as well as the business drivers. The main need in an early design phase is to bring structure in the typical chaos of uncertainty and the huge amount of realization options present. Potential realization choices all have advantages and disadvantages, which cause tensions and conflicts. The earlier the (essential) conflicts and tensions are identified, the better it is. Turning them from implicit to explicit helps the system architect in making the trade-off consciously or at least in selecting the most important tensions and conflicts that require further in-depth investigation. In this respect we demonstrate the effectiveness of a technique called “threads of reasoning”. The illustrative case study is the design of the paper flow control (sensors, actuators, control architecture, etc.) in a high-volume copier/printer