Shuttle Vehicle Speed Profile for Precise Positioning Control
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Solution Overview
Problem
Shuttle vehicles in automated logistics warehouses face inaccuracies in positioning due to speed jumps resulting from fixed acceleration and deceleration modes, leading to inefficient motion.
Innovation Solution
A method and apparatus for controlling shuttle vehicle speed by implementing a motion control strategy that includes first and second accelerated motions with varying acceleration, followed by first and second decelerated motions, with the times of these phases determined to minimize speed jumps and ensure precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed acceleration and deceleration modes are used, then the control method is simple, but speed jumps occur causing positioning inaccuracies
Solution Approach 1:
The acceleration and deceleration processes are divided into multiple phases. The acceleration phase includes a first accelerated motion and a second accelerated motion, while the deceleration phase includes a first decelerated motion and a second decelerated motion. This segmentation allows for smoother transitions and eliminates speed jumps that cause positioning inaccuracies.
Solution Approach 2:
The patent implements dynamic acceleration and deceleration control where the acceleration and deceleration rates are not fixed but vary during the motion process. The control device dynamically adjusts the acceleration and deceleration parameters based on the current state, enabling smooth speed transitions without fixed-mode limitations.
2Productivity
If fixed acceleration and deceleration modes are used, then the control system is simple, but motion efficiency is reduced due to speed jumps
Solution Approach 1:
The control system dynamically adjusts acceleration and deceleration rates during motion, transitioning from fixed-mode control to dynamic control. This allows the shuttle vehicle to maintain optimal speed profiles, eliminating unnecessary speed jumps and improving overall motion efficiency while adapting to different operational conditions.
Solution Approach 2:
The patent changes the acceleration and deceleration parameters dynamically during the motion process. Instead of using constant acceleration and deceleration values, the system varies these parameters according to the current state, allowing for smoother transitions and improved motion efficiency without requiring overly complex control systems.
Data Source
AI summary
The present disclosure provides a method and an apparatus for controlling speed of a shuttle vehicle, and a shuttle vehicle, and relates to the field of control. The method includes: controlling the shuttle vehicle to perform an accelerated motion from a starting point of a specified displacement at a initial speed, wherein the accelerated motion comprises a first accelerated motion with the acceleration increasing with time is performed at first, and a second accelerated motion with the acceleration decreasing with time is performed; controlling the shuttle vehicle to perform an uniform motion; and controlling the shuttle vehicle to perform a decelerated motion, wherein the decelerated motion comprises a first decelerated motion with the acceleration decreasing with time is performed at first, and a second decelerated motion with the acceleration increasing with time is performed, and the shuttle vehicle arrives at a destination of the specified displacement at an end speed.