Search
Search Results
-
A discrete adjoint gradient approach for equality and inequality constraints in dynamics
The optimization of multibody systems requires accurate and efficient methods for sensitivity analysis. The adjoint method is probably the most...
-
Joint–coordinate adjoint method for optimal control of multibody systems
This paper presents a joint–coordinate adjoint method for optimal control of multi-rigid-body systems. Initially formulated as a set of...
-
Discrete adjoint variable method for the sensitivity analysis of ALI3-P formulations
The sensitivity analysis of the dynamics of multibody systems is a topic that has been attracting the attention of several researchers for years,...
-
Discrete adjoint for coupled conjugate heat transfer
The typical method to solve multi-physics problems such as Conjugate Heat Transfer (CHT) is the partitioned approach which couples separate solvers...
-
A Cure for Numerical Instability of Discrete Adjoint Methods to Quasi-1D Flow Equations Near Boundaries
A term-by-term comparison has been conducted between the residuals of the continuous and discrete adjoint methods for quasi-1D flow equations. This...
-
Self-consistent Adjoint Analysis
In topology optimization of optical waves, the Gâteaux differentiability of the conjugate operator to the complex field variable results in the...
-
Input optimization for flexible multibody systems using the adjoint variable method and the flexible natural coordinates formulation
This work discusses a sensitivity information methodology for input optimization of flexible multibody systems. Mechanisms often need to perform...
-
On the Continuous Adjoint of Prominent Explicit Local Eddy Viscosity-based Large Eddy Simulation Approaches for Incompressible Flows
The manuscript deals with continuous adjoint companions of prominent explicit Large Eddy Simulation (LES) methods grounding on the eddy viscosity...
-
A graph-based methodology for constructing computational models that automates adjoint-based sensitivity analysis
The adjoint method provides an efficient way to compute sensitivities for system models with a large number of inputs. However, implementing the...
-
Discrete adjoint method for variational integration of constrained ODEs and its application to optimal control of geometrically exact beam dynamics
Direct methods for the simulation of optimal control problems apply a specific discretization to the dynamics of the problem, and the discrete...
-
On the use of adjoint gradients for time-optimal control problems regarding a discrete control parameterization
In this paper, we discuss time-optimal control problems for dynamic systems. Such problems usually arise in robotics when a manipulation should be...
-
Adjoint-based limit cycle oscillation instability sensitivity and suppression
Dynamical systems often exhibit limit cycle oscillations (LCOs), self-sustaining oscillations of limited amplitude. LCOs can be supercritical or...
-
Identifying spatiotemporal information of the point pollutant source indoors based on the adjoint-regularization method
Fast and accurate identification of the pollutant source location and release rate is important for improving indoor air quality. From the...
-
Robust optimization design of a flying wing using adjoint and uncertainty-based aerodynamic optimization approach
Robust optimization design is significant and urgently required for the fly wings, owing to its unique characteristics. However, there is a lack of...
-
Comparison of Continuous and Discrete Adjoint Methods for Topology Optimization in Structural Dynamics
Semi-analytic adjoint methods can be seen as breakthrough for deterministic topology optimization in structural dynamics since such methods have...
-
An adjoint-based methodology for calculating manufacturing tolerances for natural laminar flow airfoils susceptible to smooth surface waviness
AbstractAn adjoint-based method is presented for determining manufacturing tolerances for aerodynamic surfaces with natural laminar flow subjected to...
-
Generalized flutter reliability analysis with adjoint and direct approaches for aeroelastic eigen-pair derivatives computation
The article presents physics based time invariant generalized flutter reliability approach for a wing in detail. For carrying flutter reliability...
-
Position-Based Robot Calibration and Compensation Using an Improved Adjoint Error Model
The original adjoint error model is a complete, continuous, and minimal calibration model. However, the original model is defective in its...
-
Self-Adjoint and Co-isometry Composition and Weighted Composition Operators on Fock-Type Spaces
In this paper, we obtain characterizations for adjoint of a composition and weighted composition operator to be composition and weighted composition...
-
On the Usage of Analytically Computed Adjoint Gradients in a Direct Optimization for Time-Optimal Control Problems
This paper discusses time-optimal control problems and describes a workflow for the use of analytically computed adjoint gradients considering a...