Previous engineer in a R&D center of a Fortune 500 high-tech company (Ericsson) with 4+ years new product development experience specializing in reliability engineering. Current Mechanical Engineering Ph.D. student with proven knowledge and skills in modeling, simulation, optimization and prognostics and health management (PHM). Solid reliability educational background, hands-on MEMS testing experience, familiar with semiconductor and MEMS processing and packaging. 2+ years Matlab programming experience. Reliability Engineering: highly accelerated life testing (HALT), accelerated life testing (ALT), design verification testing, reliability modeling, failure mode and effects analysis (FMEA), root cause analysis, PHM, physics of failure
Data Analysis: Monte Carlo simulation, optimization, life cycle cost analysis, machine learning
Equipment Operation: oscilloscope, signal generator/analyzer, soldering iron, reflow oven, solder paste and stencil
Areas of Expertise
Matlab, SQL, LabVIEW, AutoCAD, ReliaSoft Weibull++, ALTA, BlockSim and DOE++, Microsoft Office
Integration & Verification Engineer April 2009 to August 2013Access Network R&D Center********* - Beijing, China
Created the first HALT and ALT specification for the R&D center Led the testing team to execute HALT on 5 Radio Base Station (RBS) products; uncovered 10 reliability defects before mass production; assisted in root cause analysis, saving Ericsson from recalling thousands of RBS globally Led the testing team to execute ALT on 1 RBS product; discovered 1 reliability issue before mass production Designed and performed ALT on a relay in a mature product; testing results were used to claim against the supplier Trained 200+ R&D colleagues on the reliability fundamentals and reliability testing methodologies Promoted to the only Reliability Technical Leader of the department in 2012 Design Verification Testing Led the testing team to implement environmental design verification testing on 10 RBS products in development Identified 20+ design defects; conducted root cause analysis, saving Ericsson from potential key customer claims Promoted to one of the Environmental Testing Technical Leaders of the department in 2012 Reliability Research on Heat Pipe Predicted the lifetime based on the Finite Element Analysis (FEA) simulation results Designed and fabricated the testing bed and fixture, programmed the testing software Designed and performed reliability testing cases Discovered 1 failure mechanism with high risk before mass production; successfully convinced suppliers to correct issue, saving the company from potential recalls Fan Cooling Subsystem Early Development Selected fan cooling subsystem for next generation Remote Radio Unit (RRU) products, which will account for 50% of Ericsson's future RBS customer deliveries Performed reliability requirement definition/decomposition, reliability modeling and lifetime prediction The established methods have been used in the development of 1 RBS new product Mechanical Structure Reliability Testing Designed mechanical vibration, shock and seismic testing cases to investigate RBS's mechanical performance Performed the testing cases, and the results corresponded well with the FEA simulation results The process has been standardized to estimate the mechanical reliability in the development of 3 new RBS products.
Graduate Research Assistant January 2014 to CurrentCALCE University of Maryland - College Park, MD
Maryland Offshore Wind Energy Challenge Grant Program (MOWER): Prognostics and Sustainability Developed the wind farm revenue and maintenance cost models based on the historical wind data analysis, considering the uncertainties in the failure forecasting from the PHM subsystems and the future wind speed profiles Developed a method to optimize the wind farm maintenance strategy for the life cycle maintenance cost reduction Estimate the life cycle maintenance cost savings by using the time series simulation (on-going) Presented the research presentations on major international wind energy and reliability conferences Ph.D.
Courses Group Projects PHM course: implemented machine learning algorithm to detect the anomaly in the lithium-ion battery degradation and the bearing crack propagation testing data Optimization course: optimized an oil well perforating gun carrier design by minimizing the volume and the stress.
Graduate Research Assistant September 2007 to January 2010Failure Analysis and Physics Research Laboratory FAPRL Beihang University - Beijing, China
Reliability Testing Method of Micro-ElectroMechanical Systems (MEMS) Investigated the failure mechanisms of MEMS inertial sensors under environmental loads Designed and fabricated the testing printed circuit board (PCB) and fixture, programmed the firmware and software Designed and implemented reliability testing cases, and analyzed the testing results Concluded that the microelectronic testing standards didn't apply well to MEMS.
MEMS based PHM Product Development Collaborated with RelEngTech (a high-tech company specializing in PHM) for joint product development Integrated a MEMS accelerator into RelEngTech's PHM sensor network prototype: designed, fabricated and assembled the PCB and the packaging, programmed and tested the firmware and software The sensor network turned into a product and received several purchase orders Invention of Failure Analysis Method Invented a new method to detect the differences among images by eliminating the distortions caused by the camera The work resulted in a patent, potential application areas including the automatic identification of the electro static discharge (ESD) damage locations, paths and components Reliability Conference Led the 4th Failure Analysis & Physics Reliability Conference preparation works, by handling registration of 100 attendees from 15+ Chinese companies, and managing travel logistics for speakers and designed brochures MAIN COURSES Reliability Analysis, Reliability Modeling and Simulation, Mathematical Techniques of Reliability Engineering, Reliability Application for Electronic Component, Failure Mechanisms and Reliability, Failure Analysis, Quality Engineering, Prognostics and Health Management, Mathematical Statistics, Engineering Optimization, Life Cycle Cost and System Sustainment Analysis, Thermal Design and Analysis ACTIVITIES & REWARDS Special contribution award for the college 20th anniversary celebration Beihang University, 2005 Student minister of the college publicity department (leading 11 student members) Beihang University, 2004 - 2005 Advanced individual in military training Beihang University, 2004.
Ph.D : Mechanical Engineering, Dec 2016University of Maryland CALCE - College Park, MDGPA: GPA: 3.88/4.00Mechanical Engineering GPA: 3.88/4.00
M.E : System Engineering, Jan 2010System Engineering
B.E : Reliability System Engineering Jul, 2007Beihang University - Beijing, ChinaReliability System Engineering Jul
ASME Member, ASQ Member, IEEE Member
Xin Lei, 301-648-3735, email@example.com, 1 of 2
X. Lei, et al, "A Preprocessing Method to Obtain Difference Images," China Patent # 200710176609.4, Mar 26, 2008.
X. Lei, et al, "PHM Based Predictive Maintenance Option Model for Offshore Wind Farm O&M Optimization," Proceedings of the Annual Conference of the PHM Society, San Diego, CA, Oct 2015.
X. Lei, et al, "PHM Based Predictive Maintenance Optimization for Offshore Wind Farms," Proceedings of the IEEE Prognostics and Health Management, Austin, TX, Jun 2015.