This paper addresses the problem of low fault estimation accuracy in Lipschitz nonlinear systems with external disturbances, presenting an innovative strategy based on a Reinforcement Iterative learning (RIL) framewor...
详细信息
An improved path planning algorithm based on RRT∗ is proposed for the manipulator to generate a collision-free path for end-effector in this paper, which maximizes the manipulator's manipulability throughout the e...
详细信息
Wind power generation technology is one of the research hotspots of renewable energy nowadays. In order to ensure the stable and reliable operation of wind power generation equipment, wind speed prediction is very imp...
详细信息
ISBN:
(纸本)9798350321050
Wind power generation technology is one of the research hotspots of renewable energy nowadays. In order to ensure the stable and reliable operation of wind power generation equipment, wind speed prediction is very important. This paper provides a new idea for the wind speed prediction based on Autoregressive Moving Average (ARMA) and Support Vector Regression (SVR). First, to reasonably divide the original data into multiple historical data with strong correlation as features to predict the future wind speed, the ARMA model is employed and its partial autocorrelation coefficient is calculated. By this means, the input features can be optimally selected and the training set of the prediction model can be constructed. Further, SVR model is used to build the nonlinear relationship between the input features and future wind speed. Finally, through simulation, it proves that this method saves more time than try and error method in selecting input features, and through comparison with Backpropagation Neural Network (BPNN), it proves that this method can achieves higher wind speed prediction accuracy.
Industrial aerodynamic system (IAS) involves a series of compressors to provide the compressed air for consumer of steel industrial park, which consumes a substantial amount of electrical energy and attracts a conside...
详细信息
A communication fault diagnosis and positioning scheme is designed according to the characteristics of the distributed control system of offshore wind turbine. Firstly, to simplify the communication link between distr...
详细信息
Advances in the field of reinforcement learning (RL)-based drive control allow formulation of holistic optimization goals for the data-driven training phase. The resulting controllers feature efficient drive operation...
详细信息
Advances in the field of reinforcement learning (RL)-based drive control allow formulation of holistic optimization goals for the data-driven training phase. The resulting controllers feature efficient drive operation without the necessity of an a priori known plant model but, so far, conduction of the corresponding training phase in real-world drive systems has been applied only sparsely due to safety concerns. This contribution targets the challenging problem of self-learning torque control for a permanent-magnet synchronous motor assuming a finite control set, i.e., the direct selection of switching actions instead of a modulator-based setup. In order to allow a secure and effective online training with real-world drive systems, the RL controller is monitored by a safeguarding algorithm that prevents application of unsafe switching actions, e.g., such that result in overcurrent. The accruing amount of measurement data is handled with the use of an edge-computing pipeline to outsource the RL training from the embedded control hardware. The inference of the utilized artificial neural network in hard real time is realized with the use of a reconfigurable field-programmable gate array architecture. The resulting RL-based algorithm is able to learn a torque control policy in just 10 min, which has been validated during comprehensive real-world experiments.
Time delays exist in a large number of practical systems, and it is meaningful to study the robust performance improvement of time-delay systems. This paper proposes an additive-state-decomposition-based robust perfor...
详细信息
Teaching system identification for control to aerospace engineering students can significantly benefit from actual experiential learning activities in a laboratory environment. In this paper, we present the experience...
详细信息
ISBN:
(纸本)9798350370959;9798350370942
Teaching system identification for control to aerospace engineering students can significantly benefit from actual experiential learning activities in a laboratory environment. In this paper, we present the experience we gathered performing hands-on project-based experimental activities conducted with a multirotor Unmanned Aerial Vehicle (UAV) within a graduate-level course teaching how to learn linear models of dynamical systems from data. We developed the activities to complement face-to-face lectures to illustrate the steps involved in the process of identifying data-driven models in a hands-on manner, and implemented them in the form of a project during the last 8 weeks of the course, to consolidate the knowledge acquired in the theoretical lectures through practical experiences. We present the lecture material we prepared, provide an overview of the obtained results, discuss the pedagogical value of the experiential learning activities, summarize student's feedback and give an outline for further improvements.
A comparison of different approaches to the automatic online, data-driven calibration of assisted gearshift settings for a motorcycle is presented. An objective function associated with the component stress and clutch...
详细信息
A comparison of different approaches to the automatic online, data-driven calibration of assisted gearshift settings for a motorcycle is presented. An objective function associated with the component stress and clutch resynchronization time is exploited and optimized during operation using different strategies: from na & iuml;ve space-filling approaches to learning-based black-box optimization algorithms. The performance of various methods is compared in real-world experiments using metrics related to the experimental convergence rate and the quality of the best found result.
Many application fields, e.g., robotic surgery, autonomous piloting, and wearable robotics greatly benefit from advances in robotics and automation. A common task is to control an unknown nonlinear system such that it...
详细信息
Many application fields, e.g., robotic surgery, autonomous piloting, and wearable robotics greatly benefit from advances in robotics and automation. A common task is to control an unknown nonlinear system such that its output tracks a desired reference signal for a finite duration of time. A learningcontrol method that automatically and efficiently designs output feedback controllers for this task would greatly boost practicality over time-consuming and labour-intensive manual system identification and controller design methods. In this contribution we propose Automatic Neural Ordinary Differential Equation control (ANODEC), a data-efficient automatic design of output feedback controllers for finite-time reference tracking in systems with unknown nonlinear dynamics. In a two-step approach, ANODEC first identifies a neural ODE model of the system dynamics from input-output data of the system dynamics and then exploits this data-driven model to learn a neural ODE feedback controller, while requiring no knowledge of the actual system state or its dimensionality. In-silico validation shows that ANODEC is able to -automatically- design competitive controllers that outperform two controller baselines, and achieves an on average & AP;30 % / 17 % lower median RMSE. This is demonstrated in four different nonlinear systems using multiple, qualitatively different and even out-of-training-distribution reference signals.
暂无评论