Flapping wing aerial vehicles are nowadays in demand due to surveillance, civil needs, espionage and border missions.A lot of challenges exists in the development of autonomous flight missions for the flapping wing ae...
详细信息
This research presents a novel configuration for a two-output ultra-high voltage DC-DC converter. The benefits of this converter include minimized voltage stress on power switch and diodes, common ground availability,...
详细信息
With flexibility in maneuverability and remarkable adaptability, airborne bistatic radar system can obtain excellent detection performance for high-speed target by employing coherent integration. However, range migrat...
详细信息
With flexibility in maneuverability and remarkable adaptability, airborne bistatic radar system can obtain excellent detection performance for high-speed target by employing coherent integration. However, range migration (RM) and Doppler frequency migration (DFM) could become serious issues due to the relative motion characteristics of airborne platforms and high-speed target. Meanwhile, various unpredictable factors such as atmospheric turbulence and mechanical issues, etc., resulting in additional motion errors, would have further negative impacts on motion state and flight trajectory of airborne platforms. This phenomenon would serious consequence on coherent integration and target detection. Thus, we make contributions to tackle these limitations and enhance coherent integration and detection performance. First, we establish signal model with high-speed target in three-dimensional (3-D) space for airborne bistatic radar system, along with motion error model which simultaneously includes translational error and rotational error. Next, we articulate range history's mathematical expression and further derive echo signal model. We then propose an improved generalized Radon Fourier transform (IGRFT) method. More specifically, the purpose of IGRFT is achieving joint search for the parameters of the target motion and the parameters of motion error, to ensure high precision parameter estimation and high gain integration. However, the computational complexity surges due to the increasing of search dimensionality. To devise computationally feasible methods for practical applications, we split the high-dimensional maximization process into two disjoint problems by sequentially searching motion parameters and then motion error parameters, and this method is named GRT (generalized Radon transform)-IGRFT. Numerical simulations show that the proposed algorithms can correctly estimate parameters and achieve signal integration and target detection. Finally, we present performanc
Because of their high torque, high power density, and appropriate speed range, brushless DC (BLDC) motors are the top choice for lightweight electric vehicles. The application's goal is to use a Hall position sens...
详细信息
Multi-user Augmented Reality (MuAR) allows multiple users to interact with shared virtual objects, facilitated by exchanging environment information. Current MuAR systems rely on 3D point clouds for real-world analysi...
详细信息
Federated Learning (FL) is a privacy-preserving algorithm that enables multiple clients to collaboratively train a global model without sharing their local data. This learning algorithm is particularly valuable in pri...
详细信息
Rice type classification is a crucial task in agri-cultural automation, aimed at improving quality control and ensuring market standards. This study presents a deep learning-based approach using a optimized Convolutio...
详细信息
In this paper, we have designed software that can simulate a driving scenario with several vehicles or pedestrians. Each target has 4 parameters: its type, speed, distance, and RCS. The software generates simulated si...
详细信息
Traditional method of images is routinely applied in electrostatic problems with infinite ground planes. However, practical situations almost always deal with finite ground planes. This causes the prediction to be ine...
详细信息
This paper presents the design and implementation of a miniaturized beam steering network that produces broadside beams when it is fed with a compact antenna *** Matrix(BM)was used as the beam steering *** was complet...
详细信息
This paper presents the design and implementation of a miniaturized beam steering network that produces broadside beams when it is fed with a compact antenna *** Matrix(BM)was used as the beam steering *** was completely built from a miniaturized 3 dB hybrid-couplers in planar microstrip *** was configured by feeding the BM with a Planar Inverted-E Antenna(PIEA)array separated at 0.3λas against the 0.5λ*** makes the BM produce a major radiation pattern at the *** from the miniaturization,no modification was made from the BM ***,employing effective mutual coupling reduction techniques helped to design the compact PIEA *** validity of this BM based multibeam PIEA array was demonstrated by comparing the simulation results of the reflection coefficients,transmissions coefficients and the radiation pattern with *** measurement results showed good agreement with simulations.
暂无评论