This paper investigates the design and implementation of a moving target control and automatic tracking system. A red laser pointer controlsystem and a green laser pointer tracking system were built using a laser poi...
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This paper presents a new method for simulation modeling of brushless DC motor controlsystem. Using MATLAB/Simulink software to combine each function module and S function organically, a complete mathematical model o...
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This article presents algorithms to solve analysis and controller synthesis problems for dynamical systems modeled as a recurrent single-hidden-layer rectified linear unit neural network (ReLU NN), or equivalently, a ...
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This article presents algorithms to solve analysis and controller synthesis problems for dynamical systems modeled as a recurrent single-hidden-layer rectified linear unit neural network (ReLU NN), or equivalently, a piecewise affine dynamical system. Such models are interesting since they may arise through the use of modern machine learning methods for system identification, or as closed-loop solutions in certain classes of model predictive control (MPC) problems. A key idea in the proposed approach is to use piecewise affine Lyapunov functions parametrized as ReLU NNs, and similarly parameterized controllers. This compatible representation between the Lyapunov function and the dynamics simplifies the automation of analysis of and controller synthesis for learned models. Our method of verifying a candidate Lyapunov function is faster than methods based on mixed integer programming. We "learn" controllers and Lyapunov functions using both weight updates and network architecture search, without gradients. We demonstrate the proposed algorithm on examples involving learned models, explicit MPC controllers, and constrained controller synthesis.
Modern Field Programmable Gate Arrays (FPGAs) offer a solution to several issues related to real-time on-board systems, such as guaranteed execution time. They are currently considered as target platforms for space ap...
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ISBN:
(纸本)9798350384529;9798350384512
Modern Field Programmable Gate Arrays (FPGAs) offer a solution to several issues related to real-time on-board systems, such as guaranteed execution time. They are currently considered as target platforms for space applications. However, the complexity of producing circuits on these components poses a challenge to their widespread adoption. To address this issue, high-level synthesis tools provide another layer of abstraction above the logic circuit design process, for example compiling C code into Hardware Description Languages such as VHDL or Verilog. However, high-level synthesis results are poorly predictable and do not guarantee the efficient use of recent FPGA capabilities provided by new primitives like digital signal processor or random-access memory. In this paper we propose a compilation chain dedicated to reactive systems, ie. controllers, providing a more predictable synthesis process for critical embedded control applications. The implemented solution demonstrates timing performance equivalent to the traditional synthesis process with a more predictable result.
In this paper, a new type of production line inspection system is constructed by combining cloud computing platform with electromechanical automation control software. The system can realize remote data acquisition, r...
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For orbiters aiming at the outer planets of our solar system, most of the.V cost is associated with the final insertion at the targeted planet. An efficient way of reducing this cost is using flybys of the moons of th...
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ISBN:
(纸本)9798350304626
For orbiters aiming at the outer planets of our solar system, most of the.V cost is associated with the final insertion at the targeted planet. An efficient way of reducing this cost is using flybys of the moons of the planet to reduce the energy of the orbit at arrival, called satellite-aided capture. designing a full transfer from the Earth to an outer planet, including multiple gravity assists and satellite-aided capture raises important issues that must be addressed. One of them is the multiple control parameters that are required to compute such a trajectory. These parameters must be varied over a large array of values to guarantee that all possibilities are covered with enough precision, ensuring that the final trajectory is the best possible. Current approaches on satellite-aided capture mainly focus on designing trajectories inside the sphere of influence of the targeted planet, with no or minimal focus on linking it to the interplanetary trajectory. However, it remains to create a full pipeline to compute a transfer trajectory from the Earth to an outer planet of the solar system using multiple gravity assists and satellite-aided capture. This paper will focus on creating such a pipeline for orbiters targeting Jupiter, Saturn, Uranus, and Neptune. First, different multiple gravity assists sequences are computed, allowing to make a choice based on transfer time and.V cost. This is obtained with a multi-objective dynamic programming exploration, allowing to capture optimal Pareto fronts of.V and time of flight in limited computational effort. This transfer sets initial conditions of the satellite-aided capture. Multiple capture sequences are computed around these initial conditions allowing to choose the one minimizing the insertion.V. Finally, the last branch of the interplanetary transfer is modified to meet the updated initial conditions of the interplanetary transfer. To compute the satellite-aided capture, the branches between the moons of the sequences
The rapid popularization of cloud computing has put forward higher requirements for network security, and the traditional network architecture is difficult to cope with the complex security requirements in the cloud c...
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The virtual DC motor (VDCM) control strategy can simulate the dynamic response of DC motors, enhance system stability and controllability, and has received widespread attention. However, a key challenge in the efficie...
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Jointly sponsored by ACM and ieee, the International conference on computer-aideddesign (ICCAD) is a premier forum to explore new challenges, present leading-edge innovative solutions, and identify emerging technolog...
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Impedance matching is a crucial concept in electrical engineering and electronics, aiming to optimize power transfer between analogue circuits and transmission lines. This paper explores the significance of impedance ...
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