Improved Whale Optimization Algorithm Based on Fusion Gravity …
In order to improve the shortcomings of the whale optimization algorithm (WOA) in dealing with optimization problems, and further improve the accuracy and stability of the WOA, we propose an enhanced regenerative whale optimization algorithm based on gravity balance (GWOA). In the initial stage, the nonlinear time-varying factor and inertia …Web
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Optimal sizing and deployment of gravity energy storage system …
Therefore, gravity energy storage system is integrated to the power plant to improve the system reliability by storing the surplus energy and delivering it back during peak demand periods. Download : ... The optimization problem was also solved for different energy storage capacities to identify its effect on the design variables.Web
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Multidisciplinary design optimization of an aircraft by
Performance, weight, aerodynamics, center of gravity, trim and dynamic stability are the considered modules in the multidisciplinary analysis that are modeled using empirical and semiempirical equations. The optimization results show that the proposed strategy has been able to offer an optimal design where has higher performance relative …Web
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Finite element analysis and structure optimization of a gantry-type
The boundary conditions, such as gravity and the amount of external force, were the same. ... Simulation and optimization integrated in the design process. Full size image.Web
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Flight Strategy Optimization for High-Altitude Solar-Powered …
In this study, a flight strategy optimization model has been proposed for the aim of HALE flight capability, which is based on the gravity energy reserving and mission altitude in practical engineering applications. This integrated model contains the five flight path phase model, the three-dimensionalWeb
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Design and optimization of integrated flexure mountsfor unloading
By optimizing the integrated flexible support, Zhang et al. [9] reduced the influence of lateral gravity on the optical performance of the mirror, as well as the influence of temperature variation ...Web
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Frontiers | Joint inversion of gravity and gravity gradient data …
Improving efficiency and accuracy are critical issues in geophysical inversion. In this study, a new algorithm is proposed for the joint inversion of gravity and gravity gradient data. Based on the regularization theory, the objective function is constructed using smoothed L0 norm (SL0), then the optimal solution is obtained by the non-linear …Web
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Integrated gravity and gravity gradient 3D inversion using the non
Section snippets Formulation of 3D gravity and gravity gradient forward calculation. The vertical component of the gravity field (g z) was defined as: g z = γ ∭ D ρ r ′ z ′ − z | r ′ − r | 3 d v ′ where γ is Newton's gravitational constant,ρ is the anomalous density distribution within domainD, and r is the observation point.The integration was based on …Web
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Integrated gravity and gravity gradient 3D inversion using the non
In this study, we developed a new method to integrate gravity and gravity gradient data in a 3D density inversion using the non-linear conjugate gradient (NLCG) …Web
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Enabling large-scale multidisciplinary design optimization through
This paper is written to honor Raphael T. Haftka's seminal contributions to multidisciplinary design optimization. We focus on those contributions that directly impacted our research, namely: the adjoint method for computing derivatives, wing aerostructural design optimization, and architectures for multidisciplinary design optimization. For …Web
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(PDF) Improved IMU Preintegration with Gravity Change and …
PDF | IMU preintegration technology has been widely used in the optimization-based sensor fusion framework, in order to avoid reintegrating the... | Find, …Web
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Improved IMU Preintegration with Gravity Change and Earth
In this paper, we have redesigned the IMU preintegration algorithm used in the optimization-based sensor fusion framework by taking the earth rotation and the …Web
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Gravity inversion of basement relief using Particle Swarm Optimization
A global optimization technique using particle swarm optimization (PSO) is presented to estimate the depth to the basement of a heterogeneous sedimentary basin from the vertical component of the residual gravity anomalies.Inversion of basement relief for known density distributions has particular importance in many real applications such …Web
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Absolute marine gravimetry with matter-wave interferometry
Here, we present absolute gravity measurements from a ship with a sensor based on atom interferometry. Despite rough sea conditions, we obtained precision below 10 −5 m s −2. The atom ...Web
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3D joint inversion of surface and borehole gravity data
Surface and borehole gravity data contain complementary information. Thus, the joint inversion of these two data types can help retrieve the real spatial distributions of density bodies. When a sharp boundary exists between an anomalous density body and its surrounding rock, the interface recovered by smooth inversion with Tikhonov …Web
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Remote Sensing | Free Full-Text | Improved the …
Gravity geologic method is one of the important to derive seafloor topography by using altimetry-gravity, and its committed step is gridding of regional gravity anomaly. Hence, we proposed a …Web
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Integrated layout design of multi-component system
A new integrated layout optimization method is proposed here for the design of multi-component systems. By introducing movable components into the design domain, the components layout and the supporting structural …Web
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A structural optimization algorithm with stochastic forces and
a, The set-up: the initial geometry of the compressed 50% 1T:50% 2H structure (left), the 1T local minimum (top right) and the 2H global minimum (bottom right).b, The convergence trajectory of ...Web
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Integrated trajectory optimization for Jupiter missions with single
We set the altitude of the gravity assist to be between 300 km and 1000 km, balancing the safety of the satellite and the effectiveness of the gravity assist. The …Web
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ExploringtheAccuracyPotentialofIMU …
Exploring the Accuracy Potential of IMU Preintegration in Factor Graph Optimization. Abstract—Inertial measurement unit (IMU) preintegration is widely used in factor graph …Web
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Improved IMU Preintegration with Gravity Change and Earth …
by Lupton et al. [25,26] for the optimization-based VINS. The technique can also be used in other optimization-based multi-sensor fusion frameworks, such as the LiDAR/IMU/GNSS integrated navigation system [27]. In [25,26], the attitude is parametrized by the Euler angles, which causes a singularity in specific cases [28].Web
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Multistage rocket preliminary design and trajectory optimization …
The force of gravity applied on the vehicle is mg, where m is the vehicle mass and g is the local acceleration of gravity, pointing to the center of the Earth. Until the end of the gravity turn maneuver, the drag force is not negligible and it has to be taken into account, being estimated from an appropriate aerodynamic model (see Sect. 3.2.3).Web
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Impact of the Earth Rotation Compensation on MEMS-IMU …
In filtering-based global navigation satellite system (GNSS) / inertial navigation system (INS) integrated navigation systems, the precise INS mechanization has fully considered the impact of the Earth rotation, Coriolis acceleration, etc. However, most inertial measurement unit (IMU) preintegration models in factor graph optimization (FGO)-based integrated …Web
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Improved IMU Preintegration with Gravity Change and …
IMU preintegration technology has been widely used in the optimization-based sensor fusion framework, in order to avoid reintegrating the high-frequency IMU measurements at each iteration and maintain …Web
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Simple gravitational particle swarm algorithm for multimodal
In real world situations, decision makers prefer to have multiple optimal solutions before making a final decision. Aiming to help the decision makers even if they are non-experts in optimization algorithms, this study proposes a new and simple multimodal optimization (MMO) algorithm called the gravitational particle swarm algorithm (GPSA). …Web
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Conceptual Aircraft Empennage Design Based on
Within a conventional aircraft design process, the horizontal tail and vertical tail are generally sized via volume coefficient methods. In this manuscript, an improved method for conceptual aircraft tail design based on multidisciplinary design optimization (MDO) approach with stability and control constraints has been developed. To develop …Web
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An Adaptive Nonlinear Iterative Method for Predicting Seafloor
After decades of efforts, only about 20% of the seafloor topography (ST) is directly mapped, and the remaining is predicted by satellite altimetry-derived gravity products. This study uses the latest gravity model and proposes a new method to refine the ST in a part of the South China Sea. The new method has several advantages.Web
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Integrated gravity and gravity gradient 3D inversion using the non
The NLCG algorithm (Fig. 2) was first proposed by Fletcher and Reeves (1964) for non-linear optimization, and was later improved by Polyak and Ribiѐre (1969). The algorithm has been widely used in magnetotelluric inversion. ... The result showed that using integrated gravity and gravity gradient data in inversion helped to identify the ...Web
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3-D inversion of gravity data | GEOPHYSICS
We present two methods for inverting surface gravity data to recover a 3-D distribution of density contrast. In the first method, we transform the gravity data into pseudomagnetic data via Poisson's relation and carry out the inversion using a 3-D magnetic inversion algorithm. In the second, we invert the gravity data directly to recover a minimum …Web
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Optimization of Drip Irrigation Systems Using Artificial
The optimization is achieved by minimizing the mean square deviation of the moisture content from the target distribution at a given moment in time. The chapter describes the optimization of drip irrigation system with buried sources in a dry soil. Results demonstrate high accuracy and effectiveness of the method.Web
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