Mandar Phadnis
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View article: Lyapunov-Based Framework for Platform Motion Control of Floating Offshore Wind Turbines
Lyapunov-Based Framework for Platform Motion Control of Floating Offshore Wind Turbines Open
Floating offshore wind turbines (FOWTs) unlock superior wind resources and reduce operational barriers. The dynamics of FOWT platforms present added engineering challenges and opportunities. While the motion of the floating platform due to…
View article: Operational Pitch Actuation Dynamics for Offshore Wind Turbines Ranging from 5 to 50 MW
Operational Pitch Actuation Dynamics for Offshore Wind Turbines Ranging from 5 to 50 MW Open
Modern wind turbines have been continuously growing in size due to the increased power generation and reduced costs associated with larger rotors and more abundant wind resources offshore. In order to effectively implement pitch control on…
View article: A Tutorial on the Control of Floating Offshore Wind Turbines: Stability Challenges and Opportunities for Power Capture
A Tutorial on the Control of Floating Offshore Wind Turbines: Stability Challenges and Opportunities for Power Capture Open
Climate change is a serious threat facing humanity. The United States (U.S.) and many other countries are increasing the amount of electrical power generated from renewable energy sources in an effort to combat climate change and ensure en…
View article: Comparison of 25 MW downwind and upwind turbine designs with individual pitch control
Comparison of 25 MW downwind and upwind turbine designs with individual pitch control Open
As conventional upwind wind turbines grow larger, the increased mass and flexibility of the longer blades present challenges concerning costs, structural loads, and safety constraints such as tower clearance. At extreme scales, wind turbin…
View article: Impact of Blade Pitch Actuation System on Wind Turbine Cost and Energy Production
Impact of Blade Pitch Actuation System on Wind Turbine Cost and Energy Production Open
To minimize the levelized cost of energy (LCOE) of wind turbines, advanced co-design strategies are required that also consider the contribution of active blade pitch control to overall energy production and wind turbine cost. Thereby, the…
View article: Optimal operating points for wind turbine control and co‐design
Optimal operating points for wind turbine control and co‐design Open
A versatile framework is introduced for determining optimal steady‐state operating points for wind turbine control. The framework is based on solving constrained optimization problems at fixed wind speeds and allows for systematically stud…
View article: Advanced wind turbine control development using field test analysis for generator overspeed mitigation
Advanced wind turbine control development using field test analysis for generator overspeed mitigation Open
Turbulent and gusty wind conditions can cause generator overspeed peaks to exceed a threshold that then lead to wind turbine shutdowns, which then decrease the energy production of the wind turbines. We derive so‐called “gust measures” tha…
View article: Sink or Swim: A Tutorial on the Control of Floating Wind Turbines
Sink or Swim: A Tutorial on the Control of Floating Wind Turbines Open
Within the rapidly growing wind energy sector, floating offshore wind turbines are expected to be the fastest growing portion. This is largely driven by the immense offshore wind resources that are mostly over deep water, where fixed-botto…
View article: Field tests of a highly flexible downwind ultralight rotor to mimic a 13-MW turbine rotor
Field tests of a highly flexible downwind ultralight rotor to mimic a 13-MW turbine rotor Open
Offshore extreme-scale turbines of 20–25 MW in size may offer reduced energy costs. The technical barriers at these extreme scales include escalating blade masses with increased flexibility as well as high gravity loads and tower-strike is…
View article: Control of a Floating Wind Turbine on a Novel Actuated Platform
Control of a Floating Wind Turbine on a Novel Actuated Platform Open
Designing a floating offshore wind turbine (FOWT) controller requires solving engineering challenges not found for fixed-bottom turbines. This paper applies several methods from the growing body of FOWT control literature to the 10-MW Ultr…
View article: Attitude Dynamics Modeling of Nanosatellites with Flexible Deployable Structures
Attitude Dynamics Modeling of Nanosatellites with Flexible Deployable Structures Open
Maxwell is a student built CubeSat scheduled for launch in 2021. The satellite is being designed to carry and deploy a large reflectarray antenna for in-orbit ground communication testing. This paper develops a general model of a satellite…