1 PhD position in Dynamic Behaviour Synthesis in Compliant Mechanisms in Netherlands | Delft University of Technology (TU Delft)

Compliant mechanisms are monolithic parts that move due to deformation of slender segments. A variety of design methods has been proposed in the last few decades, which has led to increased understanding and application of compliant mechanisms. In spite of this effort, several challenges remain. By far the most effort has been directed to quasi-static behaviour. Indeed, accurately realising prescribed kinematics in compliant mechanisms is a formidable challenge in itself. As velocity demands increase, dynamics must be taken into account in order to maintain this accuracy, which is a challenge even at moderate speeds. Here, a fundamental issue of compliant mechanisms complicates the design and analysis: unlike linkages, compliant mechanisms do not have a limited and fixed integer number of degrees of freedom: depending on the load case, compliant mechanisms can be considered as having infinite degrees of freedom in theory. In dynamic motion, their distributed mass raises challenges in this regard. It leads to complicated and at times undesired parasitic behaviour, making it challenging to achieve the targeted kinematic and dynamic response. Also, it complicates the interaction of multiple compliant parts in a larger system.

The objective of this project is to develop theory, generic modelling techniques and a design tool to create compliant mechanisms with prescribed kinematic and dynamic behaviour, in the presence of friction and impact. Topology, shape and size optimisation techniques will also be employed, yet always from a synthesis perspective. This implies that the models will need to be computationally inexpensive, given the iterative nature of the synthesis optimisation. While the analysis and synthesis techniques developed will be generic, applications of choice will include precision mechanisms that are characterised by fast or precise motion, such as scientific instruments. Project results will include a theoretical foundation, a synthesis framework and a sequence of physical demonstrators.

Requirements

We are looking for an enthusiastic candidate with an MSc degree in Mechanical Engineering or a closely related field, with outstanding results. Key qualifications include:

• Creativity and ability to invent novel mechanisms and design methods;
• Excellent theoretical background in dynamic modelling and analysis;
• Affinity for compliant mechanism design and application, computational mechanics and software development, as well as prototyping and experimental evaluation;
• Comfortable in a competitive environment with tight schedules and strong industry involvement;
• Flexible team player;
• Long-term vision;
• Excellent writing and presentation skills in English.

Conditions of employment

TU Delft offers an attractive benefits package, including a flexible work week and the option of assembling a customised compensation and benefits package (the 'IKA'). Salary and benefits are in accordance with the Collective Labour Agreement for Dutch Universities. As a PhD candidate you will be enrolled in the TU Delft Graduate School. TU Delft Graduate School provides an inspiring research environment; an excellent team of supervisors, academic staff and a mentor; and a Doctoral Education Programme aimed at developing your transferable, discipline-related and research skills.

Department

Faculty of Mechanical, Maritime and Materials Engineering (3mE)

The research within the Precision and Microsystems Engineering (PME) Department is focused on developing the knowledge and technology for the realisation of small devices and systems, including microsystems and microelectronics. This is a domain that has strong international industrial players in the Netherlands. The systems and products advancement in terms of miniaturisation and function density improves precision, speed, and reliability. We believe that microsytems and their integration with larger-scale systems play an essential role in this performance-driven domain. The Mechatronic Systems Design (MSD) section within the PME Department focuses on precision mechatronics; the relevant subsystems like compliant (micro)mechanisms, measurement and actuation; and their controlled operation. A strong link is maintained to the high-tech industry in the Netherlands and abroad, which guarantees ample possibilities for valorisation of the research achievements.