William Liu

William Liu is a Researcher at KTH Royal Institute of Technology's Department of Vehicle Engineering and Technical Acoustics since 2020, focusing on railway energy and sustainability. He has extensive experience in railway systems development, having contributed to high-speed rail projects (up to 421 km/h) and over 20 research projects, yielding 60 publications. His work emphasizes energy efficiency, safety, and innovative systems like maglev and hyperloop.

Education: He holds a Doctor of Philosophy (2017), Licentiate (2015), and Master's (2009) in Mechanical Engineering from KTH and Tianjin University. He is also a Docent in Rail Vehicle Technology (expected 2025).

Research interests include traction systems, electric power supply optimization, pantograph-catenary dynamics, climate adaptation, and circular economy applications in rail transport. He teaches multiple courses, including Rail Vehicle Technology and Energy Technologies for Sustainable Transport at the bachelor and master levels, and advises doctoral students in areas like braking systems and vehicle dynamics under adverse conditions.

Recent research trends in his articles focus on smart controllers for decarbonization, pantograph-catenary interaction dynamics, and hyperloop technology. He co-supervises PhD projects and mentors over 20 thesis students, addressing topics such as energy optimization for commuter trains and circular economy quantification.

He is a member of the Swedish Electrical Standardization Committee and leads the KTH Delsbo Electric Team, actively shaping industry standards and next-gen rail innovation.