Reinier van Dijk

Pulsed jet actuators (PJAs) are one of the candidate technologies to be integrated in Fowler flaps to increase the maximum lift coefficient of transport aircraft in the landing configuration. The total system consists of the actuators plus sensors, a piping system to supply pressurized air and a (redundant) power and communication system to provide actuator control. In this paper, it is investigated what increase in the maximum lift coefficient is required to justify the added weight and power… Meer weergeven

Pulsed jet actuators (PJAs) are one of the candidate technologies to be integrated in Fowler flaps to increase the maximum lift coefficient of transport aircraft in the landing configuration. The total system consists of the actuators plus sensors, a piping system to supply pressurized air and a (redundant) power and communication system to provide actuator control. In this paper, it is investigated what increase in the maximum lift coefficient is required to justify the added weight and power off-takes that accompany the integration of pulsed jet actuators. This is done by making an automated design process for the overall aircraft, the piping assembly system, and the electrical wiring interconnection system. These last two sub-systems rely on KBE techniques that automate dimensioning and performance evaluation. A test case is specified that encompasses the design of a typical single-aisle mid-range aircraft with and without the PJA system installed. It is concluded that the introduction of the PJA system requires at least an increase in maximum lift coefficient of 0.2 to justify the increase in system mass and power off-takes. Furthermore, it is shown that if the maximum lift coefficient increases with 0.4, only small reductions in maximum take-off weight (−0.3 %) and operating empty weight (−0.6 %) can be expected, while the total fuel burn remains virtually constant. Minder weergeven

The Product Development Process (PDP) of manufacturing companies requires the efficient management of huge amounts of data from different sources and their integration in the sub-processes that compose the product development chain. This is a very challenging endeavor for which an integrated approach does not yet exist. The EC FP7 Project iProd aims at filling this void, by developing a flexible and service-oriented software framework, supported by a knowledge base that is structured by means… Meer weergeven

The Product Development Process (PDP) of manufacturing companies requires the efficient management of huge amounts of data from different sources and their integration in the sub-processes that compose the product development chain. This is a very challenging endeavor for which an integrated approach does not yet exist. The EC FP7 Project iProd aims at filling this void, by developing a flexible and service-oriented software framework, supported by a knowledge base that is structured by means of ontologies, to improve the efficiency and the quality of the PDP in the preliminary design phase. This paper discusses the first prototype of this software framework. The logic, overall software architecture and some of the implementations details of the framework are described. The functionalities of the software framework are demonstrated by means of two use-cases from two different domains, i.e. the automotive domain, represented by the development process of a car door, and the aerospace domain, represented by the development process of a rudder for a business jet. Preliminary testing, using the first prototype, indicates that the application of the framework to the two use-cases can yield benefits in terms of a reduction in development time in the preliminary design phase and results in product quality improvements, by having additional time for more design iterations to increase the maturity level during this phase. However, the framework is to be improved in terms of reliability, efficiency and maintainability. These improvements will be done during the development of two more software prototypes. Minder weergeven

Master's thesis of Patrick Chan, who I've mentored throughout the process.

Master's thesis of Noldus Reijnders, who I've mentored throughout the process.

Competitive aircraft box structures are a perfect compromise between weight and price. The conceptual design process of these structures is a typical Multidisciplinary Design and Optimization effort, normally conducted by human engineers. The iterative nature of MDO turns development into a long and costly process. Knowledge-Based Engineering can be used to automate this process by capturing relevant design process knowledge, which is then re-used inside a computer application. This research… Meer weergeven

Competitive aircraft box structures are a perfect compromise between weight and price. The conceptual design process of these structures is a typical Multidisciplinary Design and Optimization effort, normally conducted by human engineers. The iterative nature of MDO turns development into a long and costly process. Knowledge-Based Engineering can be used to automate this process by capturing relevant design process knowledge, which is then re-used inside a computer application. This research will introduce a parametric, generative box model that has been developed using KBE techniques. The generality and rule-basedness of this model allows for the automatic generation of a wide range of box configurations and variants, thereby enabling a thorough exploration of the design space. Structural and price analyses tools have been coupled to the box model to generate the required discipline-specific performance data. With the product model and coupled analysis tools ready, the goal is to automatically optimize for minimum weight and price without human intervention. The design of Gulfstream 650 rudder is considered as initial use case, the first experiences of which are discussed in this paper. Minder weergeven

Authoring and maintaining 3D content for the Web typically requires working in disjoint environments: one for creating static or dynamic HTML-based website content, and a different one for making 3D content. For website and web application development, language-based frameworks are typically used. For development of 3D content, a visual CAD-style tools are used, with static models exported to a form useful on the web such as X3D. Users have come to expect dynamic web experience, with content… Meer weergeven

Authoring and maintaining 3D content for the Web typically requires working in disjoint environments: one for creating static or dynamic HTML-based website content, and a different one for making 3D content. For website and web application development, language-based frameworks are typically used. For development of 3D content, a visual CAD-style tools are used, with static models exported to a form useful on the web such as X3D. Users have come to expect dynamic web experience, with content customized to their needs and based on simple user interface elements. Conspicuously absent from mainstream use has been a truly unified, declarative authoring environment which can provide for everything from simple web page generation through to detailed 3D geometric models. Minder weergeven

Today’s cars are complex products. As a consequence the product development process heavily relies on experienced engineers, knowledge contained in handbooks and understanding derived from software applications. The TU Delft has developed an intelligent software framework that integrates knowledge and software applications to improve the design process for plastic car components. This publication of mine in Leonardo Times of June 2011 gives an overview of the research done.

In order to remain competitive with respect to low-cost overseas markets, domestic moldmakers will have to increase the productivity of their engineers and maintain high quality standard, while dealing with the problem of an aging workforce. To increase the competitiveness of the European automotive industry, the concept of an Integrated Design and Engineering Environment (IDEE) has been developed within the 6th framework European project Pegasus - Integrated engineering processing & materials… Meer weergeven

In order to remain competitive with respect to low-cost overseas markets, domestic moldmakers will have to increase the productivity of their engineers and maintain high quality standard, while dealing with the problem of an aging workforce. To increase the competitiveness of the European automotive industry, the concept of an Integrated Design and Engineering Environment (IDEE) has been developed within the 6th framework European project Pegasus - Integrated engineering processing & materials technologies for the European sector. The IDEE consists of a distributed set of software applications able to accelerate the design process of plastic injection molds by means of process automation and multidisciplinary optimization techniques. Minder weergeven

Knowledge-Based Engineering (KBE) is a research field that studies methodologies and technologies for capture and re-use of product and process engineering knowledge. The objective of KBE is to reduce time and cost of product development, which is primarily achieved through automation of repetitive design tasks while capturing, retaining and re-using design knowledge. Published research on KBE is not very extensive and also quite dispersed; this paper is an effort to collect and review existing… Meer weergeven

Knowledge-Based Engineering (KBE) is a research field that studies methodologies and technologies for capture and re-use of product and process engineering knowledge. The objective of KBE is to reduce time and cost of product development, which is primarily achieved through automation of repetitive design tasks while capturing, retaining and re-using design knowledge. Published research on KBE is not very extensive and also quite dispersed; this paper is an effort to collect and review existing literature on KBE. A total of fifty research contributions have been analysed. The main objectives of this analysis are to identify the theoretical foundations of KBE and to identify research issues within KBE, pointing out the challenges and pitfalls that currently prohibit a wider adoption of KBE while suggesting avenues for further research. Key findings include a) the necessity for improved methodological support and adherence, b) better transparancy and traceability of knowledge, c) the necessity for a quantitative framework to assess the viability and success of KBE development and implementation projects, and d) the opportunity to move towards mass customization approaches through distributed deployment of KBE in the extended enterprise. Minder weergeven

My internship report published in Leonardo Times, March 2007