Intelligent trajectory tracking control method for mobile robot

A mobile robot and trajectory tracking technology, applied in the control field, can solve the problems of difficult modeling of mobile robots, low feasibility, and the model cannot completely replace the nonlinear robot model, and achieve the effect of good trajectory tracking effect.

Active Publication Date: 2021-06-11
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0003] The dynamic equations of mobile robots are nonlinear, and most of the existing control methods are based on models. Although many feedback linear methods have been widely used in mobile robot control, including exact feedback linearization, approximate feedback l

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  • Intelligent trajectory tracking control method for mobile robot
  • Intelligent trajectory tracking control method for mobile robot
  • Intelligent trajectory tracking control method for mobile robot

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[0059] In order to make the objects, technical solutions, and advantages of the present invention, the technical solutions of the present invention will be further described below with reference to the accompanying drawings and actual experiments.

[0060] Refer Figure 1 - Figure 4 , A mobile robot's intelligent trajectory tracking control method, for a given mobile robot model, utilizing the convergence estimation weight of the least squares method; and updating the weight of the controller by introducing neural network and strengthening the policy iteration in the learning , Solve the optimal value function.

[0061] The intelligent trajectory tracking control method of the mobile robot of the present embodiment includes the following steps:

[0062] 1) Establish a nonlinear system of mobile robots;

[0063] 2) Initialize the status variable of the system and give initial strategy;

[0064] 3) Using the method of reintegration of learning strategies to update the weight, seek the...

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Abstract

The invention discloses an intelligent trajectory tracking control method for a mobile robot, and the method is characterized by estimating a weight value of a given mobile robot model through the convergence of a least square method; updating the weight of a controller by introducing a neural network and a strategy iteration method in reinforcement learning, solving an optimal value function. The method comprises the following steps: 1) establishing a mobile robot nonlinear system; 2) initializing a state variable of the system, and giving an initial strategy; 3) updating the weight by using a reinforcement learning strategy iteration method, and solving an optimal strategy; 4) introducing a neural network algorithm and calculating a weight by using the convergence of least squares; and 5) stopping strategy updating. According to the method, a relatively good trajectory tracking effect is ensured under the condition that internal dynamic knowledge of a power system is not needed.

Description

technical field [0001] The invention belongs to the technical field of control, and specifically provides an intelligent trajectory tracking control method for a mobile robot, which ensures a better trajectory tracking effect without the need for internal dynamic knowledge of a power system. Background technique [0002] The value of mobile robots in actual production and life is increasing day by day, and the research on mobile robots has also received more attention. With the emergence of various mobile robots in various forms, the research on their control problems has also attracted the attention of relevant researchers. [0003] The dynamic equations of mobile robots are nonlinear, and most of the existing control methods are based on models. Although many feedback linear methods have been widely used in mobile robot control, including exact feedback linearization, approximate feedback linearization and pseudo-linearization, etc., but The model obtained after linearizat...

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Application Information

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IPC IPC(8): G05D1/02
CPCG05D1/0253G05D1/0223G05D1/0221G05D1/0276
Inventor 朱俊威董子源张恒吴珺张文安
Owner ZHEJIANG UNIV OF TECH
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