In this paper, a model predictive path tracking controller is designed for the path tracking of the autonomous underwater vehicle (AUV). Firstly, Serret-Frenet coordinate system is introduced, and the path tracking er...
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In this paper, a model predictive path tracking controller is designed for the path tracking of the autonomous underwater vehicle (AUV). Firstly, Serret-Frenet coordinate system is introduced, and the path tracking error system model is established in this coordinate system. Based on Lyapunov theory and Backstepping method, the forward heading of AUV is conversed to the target value. Then, a nonlinear model predictive control design constraint path following control law of the AUV based on rolling to solve constrained optimization problems, satisfy the constraint of extension control input, to hit the target heading control. In the end, AUV-T, an underwater robot developed by Harbin engineering university, was used to test the proposed control law. The results showed that the controller showed good tracking effect.
The main objective of this research is the presentation of a maximisation of payload haulage by use of UAV for payload spraying purposes of a pesticide in a regular field. Optimal control from principles of calculus o...
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ISBN:
(纸本)9798350307573;9798350307566
The main objective of this research is the presentation of a maximisation of payload haulage by use of UAV for payload spraying purposes of a pesticide in a regular field. Optimal control from principles of calculus of variations is applied to formulate the maximisation problem. The variable payload models the parameter dependant UAV. The system evolves on a principle fibre bundle on a SE(3) x S-2 manifold necessitating a from principles calculus of variations optimal formulation which is the key contribution of this paper. An illustrative spraying example is used to demonstrate a maximal pesticide spraying problem. Future work will include the formulation of optimal control problems on the semi-direct function Manifold
Compound pendulum swings with the reference trajectory accurately so that we could get the motion states of it easily. To ensure the compound pendulum tracking performance, we propose a switch controller of PID and mo...
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Compound pendulum swings with the reference trajectory accurately so that we could get the motion states of it easily. To ensure the compound pendulum tracking performance, we propose a switch controller of PID and model reference adaptive controller (PID+MRAC). According to its equations of motion, we can establish a suitable model and obtain correspond adaptive reference rules. We determine a suitable threshold, then compare the error and threshold to choose PID control or MRAC control. The same output results could be obtained from reference model and plant model by adjusting the gain. Similarly, we compare the preference of PID controller, MRAC and PID+MRAC switch controller to evaluate which one is better. The results show that the switch control is the best one and the MRAC control is better than the PID control.
This paper presents the design and control of a wastewater treatment plant with mechatronic systems. In this work, a control is developed for each level of treatment in order to optimize time and resources in construc...
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ISBN:
(纸本)9781728186382
This paper presents the design and control of a wastewater treatment plant with mechatronic systems. In this work, a control is developed for each level of treatment in order to optimize time and resources in construction. The development of the project shows that the application of a level sensor and a suction and exhaust pump is feasible in each of the treatment tanks. A heater was also added in the activated sludge treatment to increase the temperature and control the sludge faster. In addition, a reduction in the time for the system to stabilize can be visualized, including a PM control in all processes, managing not to cause overflows in the tanks and having a stable control. The optimal values obtained from the controller for the first system are 36, 0.00036, and 598450, for the second are 30, 0.02, 15 respectively. The implemented control will help to have a preventive and controlled maintenance of the entire system and avoid losses.
This paper investigates the problem of consensus for second-order multi-agent systems with switching topologies and time-delays. The switching topologies and communication time-delays are described by Markov chains. B...
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ISBN:
(纸本)9781538666630
This paper investigates the problem of consensus for second-order multi-agent systems with switching topologies and time-delays. The switching topologies and communication time-delays are described by Markov chains. By using a model transformation approach, sufficient conditions are established under which consensus is guaranteed. A numerical example is provided to verify the effectiveness of the proposed approach.
This study presents the designs of monolithic compliant grippers made by silicon rubber for adaptive grasping applications. The proposed grippers are symmetric two-finger designs actuated by one linear actuator. An op...
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ISBN:
(纸本)9781538666630
This study presents the designs of monolithic compliant grippers made by silicon rubber for adaptive grasping applications. The proposed grippers are symmetric two-finger designs actuated by one linear actuator. An optimal design procedure including topology and size optimization methods is used to synthesize the rubber grippers with the objective to maximize mechanical advantage, which is defined as the ratio of output force to input force. Three grippers synthesized with different design parameters are prototyped. The best design is identified through the adaptability test, and a robotic gripper assembly is developed to demonstrate the effectiveness of the design through the test of grasping irregular objects. The maximum payload for the gripper assembly is identified as 2.5kg.
Electrohydraulic actuation systems are widely used in a variety of industries, including robotics, manufacturing, mining, agriculture, and vehicle manufacturing. Some industries, such as agriculture and mining, requir...
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Terrain classification is a necessary and difficult task for all off-road robots. Most existing methods use images or proprioceptive sensors for recognition. However, while taking proprioceptive sensors as input requi...
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A disturbance observer-based H∞ composite control method under disturbances and deception attacks is addressed in this paper. Firstly, the control model is constructed. Secondly, a disturbance observer-based H∞ comp...
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Direct current-direct current buck converters are widely used in industrial fields. In practical applications, parameter uncertainty, external disturbances and measurement noise affect the control performance of DC-DC...
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