The variable speed limit (VSL) control is responsible for real-Time adjustment of speed limits based on traffic conditions in sensor-based environments. Integration of this traffic management strategy with intelligent...
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This paper presents a study on the control of unmanned bicycle motion based on inertial wheels in the pybullet physics simulation environment. To address the nonlinear and strongly coupled nature of unmanned bicycles,...
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The welfare of pet birds, particularly species like Jenday Conures, is essential for their health and happiness. Traditional birdcages often struggle to meet the needs of these intelligent and social birds, prompting ...
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This paper introduces a control architecture for real-time and onboard control of Unmanned Aerial Vehicles (UAVs) in environments with obstacles using the Model Predictive Path Integral (MPPI) methodology. MPPI allows...
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ISBN:
(纸本)9798350377712;9798350377705
This paper introduces a control architecture for real-time and onboard control of Unmanned Aerial Vehicles (UAVs) in environments with obstacles using the Model Predictive Path Integral (MPPI) methodology. MPPI allows the use of the full nonlinear model of UAV dynamics and a more general cost function at the cost of a high computational demand. To run the controller in real-time, the sampling-based optimization is performed in parallel on a graphics processing unit onboard the UAV. We propose an approach to the simulation of the nonlinear system which respects low-level constraints, while also able to dynamically handle obstacle avoidance, and prove that our methods are able to run in real-time without the need for external computers. The MPPI controller is compared to MPC and SE(3) controllers on the reference tracking task, showing a comparable performance. We demonstrate the viability of the proposed method in multiple simulation and real-world experiments, tracking a reference at up to 44 km h(-1) and acceleration close to 20 m s(-2), while still being able to avoid obstacles. To the best of our knowledge, this is the first method to demonstrate an MPPI-based approach in real flight.
The intelligentcontrol of walking of humanoid robots is one of the key research directions in the field of robotics research, but the traditional motion model's constraint on the center of mass makes it difficult...
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ISBN:
(纸本)9798331530372;9798331530365
The intelligentcontrol of walking of humanoid robots is one of the key research directions in the field of robotics research, but the traditional motion model's constraint on the center of mass makes it difficult for robots to maintain walking stability and simulate human gait at the same time for its excessive attention on stability. Compared with the traditional deep reinforcement learning algorithm, the DDPG algorithm has the ability to handle continuous action space and high-dimensional state space, and has a wide application prospect in many practical problems. We proposed a bipedal robot control method based on reward function optimization to enable the robot to achieve both stable high-speed movement and human gait imitation. This paper combines the physical characteristics of the bipedal robot to establish a control system based on the DDPG algorithm. At the same time, the reward function is designed to guide the robot to learn the correct walking strategy. Through the comparative test, the weight limit ratio of each reward function for the bipedal robot to stably increase the speed is given. The simulation results show that the method proposed in this paper has good practicality and effectiveness.
Tactile sensors and material classification are important aspects of improving robotics grasping. Previously many different tactile sensors and classification have been introduced. Tactile sensors used were either cus...
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ISBN:
(纸本)9798350373172;9798350373189
Tactile sensors and material classification are important aspects of improving robotics grasping. Previously many different tactile sensors and classification have been introduced. Tactile sensors used were either customized in different arrays or have complex architecture. Artificial mechanoreceptor type sensors have also been used to perform different types of classification, but hardness-based classification has never been investigated. In some cases, general tactile sensors were used to perform hardness-based classification, but it didn't show up good accuracy score while using different machine learning algorithms. This approach uses off shelf tactile sensors and emulates mechanoreceptor patterns using neural-spike encoder techniques to represent that off shelf tactile sensors have capability to emulate spike train which may indicate some patterns same as human receptors. And further using raw sensor data and digital spike patterns data as additional feature to performs analysis. Outcome of hardness-based classification with 20% test size data indicates that spike patterns data can increase predictability accuracy score in different combination of sensors data where with three sensors it remains highest of 93.9% improved from 91.8%. And spike patterns for some mechanoreceptors also showcase that off shelf can be used to generate mechanoreceptor patterns.
The inherent underactuation and strong coupling characteristics of quadrotor UAVs make the design of their trajectory tracking controllers challenging. To address the issues of dynamic uncertainties and unknown extern...
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This study introduces an innovative human-computer collaboration framework for mining requirements from closed-loop control models in industrial systems. Traditional approaches in this domain face challenges due to va...
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ISBN:
(纸本)9798350373141;9798350373158
This study introduces an innovative human-computer collaboration framework for mining requirements from closed-loop control models in industrial systems. Traditional approaches in this domain face challenges due to vague, non-modular, evolving, or sometimes unknown requirements. Our framework bridges this gap by enabling a synergetic interaction between the user and a computer agent, facilitating the efficient mining of optimal specifications through an interactive interface. We conducted two experimental studies with ten participants to validate our approach. The findings reveal that the integration of human expertise and computational algorithms accelerates the optimization process, thereby aiding designers in achieving satisfactory system designs more rapidly. This research contributes to the field of model-based system design by presenting a novel paradigm that leverages the strengths of both human intuition and computer-based optimization.
In this paper, we propose a hierarchical framework for multi-agent systems to enhance cooperative tasks in dynamic environments. Accomplishing cooperative tasks can be challenging in dynamic environments. Reinforcemen...
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ISBN:
(纸本)9798350364200;9798350364194
In this paper, we propose a hierarchical framework for multi-agent systems to enhance cooperative tasks in dynamic environments. Accomplishing cooperative tasks can be challenging in dynamic environments. Reinforcement learning is a popular approach in this field, enabling agents to make real-time decisions. However, large state and action spaces often lead to poor performance, such as slow convergence and suboptimal policies. To address this issue, we utilize a hierarchical framework. Long-horizon and complicated tasks are decomposed into multiple subtasks. At the low-level, each subtask has a corresponding decision-making model, trained using the Soft Actor-Critic reinforcement learning algorithm. Additionally, a high-level component is introduced to determine which subtask to tackle at any given time. We discuss our method in the context of the popular hunting problem involving pursuers and an evader. Simulation demonstrates the efficacy and feasibility of our method in the hunting problem environment setting.
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