相关实验视频
Updated: Jun 24, 2025

10:09
Operation of the Collaborative Composite Manufacturing CCM System
Published on: October 1, 2019
6.6K
E-PVT:用于计算机控制的光学加工的增强位置-速度-时间调度器,全面考虑动态约束,连续性和效率
Optics express
|June 11, 2024
概括
增强的位置-速度-时间 (PVT) 控制通过优化机床路径来改善光学加工. 这种方法减少了计算负载,并考虑了动态约束,在像离子束计算这样的过程中实现了更高的精度.
科学领域:
- 光学工程是指光学工程.
- 精密制造业 精密制造业 精密制造业
- 控制系统 控制系统
背景情况:
- 高品质的光学表面需要精确而光滑的运动控制在计算机控制的完成.
- 位置-速度-时间 (PVT) 是一种常见的运动控制模型,但之前基于PVT的方法面临着计算和约束限制的局限性.
- 现有的方法在密集的工具路径中扎着计算强度,并且没有完全解决动态约束或速度/加速连续性.
研究的目的:
- 为了解决以前基于PVT的速度调度方法在光学加工中的局限性.
- 开发一种增强的PVT (E-PVT) 方法,这种方法在计算上是高效的,并且充分考虑动态约束和连续性.
- 为超越动态约束的情况引入补偿机制.
主要方法:
- 提出了增强型PVT (E-PVT) 方法,将时间复杂性从O(n^3) 降低到O(n).
- 在PVT框架内,纳入了对动态约束和速度/加速连续性的全面考虑.
- 开发了一种新的补偿策略,使用粒子群优化用于动态约束违规.
主要成果:
- E-PVT 方法显著降低了计算时间复杂性.
- E-PVT成功地解决了动力学约束,并确保了速度和加速的连续性.
- 拟议的补偿方法有效地处理了超越约束的情况,同时保持了处理效率.
结论:
- 增强型PVT (E-PVT) 方法为计算机控制的光学加工提供了更高效和更强大的解决方案.
- 通过克服以前的局限性,E-PVT提高了诸如离子束计算等过程的精度和融合.
- 通过模拟和实验验证证证了E-PVT方法的卓越性能.
相关概念视频
Velocity and Position by Graphical Method
7.4K
Velocity and position can be calculated from the known function of acceleration as a function of time. The total area under the acceleration-time graph and the velocity-time graph gives the change in velocity and position, respectively. In the case of an airplane, its acceleration is tracked using the inertial navigation system. The pilot provides the input of the airplane's initial position and velocity before takeoff. The inertial navigation system then uses the acceleration data to...
7.4K
Velocity and Position by Integral Method
6.0K
If acceleration as a function of time is known, then velocity and position functions can be derived using integral calculus. For constant acceleration, the integral equations refer to the first and second kinematic equations for velocity and position functions, respectively.
Consider an example to calculate the velocity and position from the acceleration function. A motorboat is traveling at a constant velocity of 5.0 m/s when it starts to decelerate to arrive at the dock. Its acceleration is...
Consider an example to calculate the velocity and position from the acceleration function. A motorboat is traveling at a constant velocity of 5.0 m/s when it starts to decelerate to arrive at the dock. Its acceleration is...
6.0K
Kinematic Equations - II
9.5K
The second kinematic equation expresses the final position of an object in terms of its initial position, the distance traveled with the initial constant velocity, and the distance traveled due to a change in velocity. Similar to the first kinematic equation, this equation is also only valid when the acceleration is constant throughout the motion of an object.
Suppose a car merges into freeway traffic on a 200 m long ramp. If its initial velocity is 10 m/s and it accelerates at 2 m/s2, then the...
Suppose a car merges into freeway traffic on a 200 m long ramp. If its initial velocity is 10 m/s and it accelerates at 2 m/s2, then the...
9.5K
Kinematic Equations - III
7.6K
The first two kinematic equations have time as a variable, but the third kinematic equation is independent of time. This equation expresses final velocity as a function of the acceleration and distance over which it acts. The fourth kinematic equation does not have an acceleration term and provides the final position of the object at time t in terms of the initial and final velocities. This equation is useful when the value of the constant acceleration is unknown.
Using the kinematic equations,...
Using the kinematic equations,...
7.6K
Work and Energy for Variable Forces
3.6K
When an object is acted upon by a variable force, the amount of work done and the change in energy of the object can be more complex to calculate compared to when a constant force is applied. Work is the product of force and displacement, while energy is the capacity of a system to do work. When a constant force is applied to an object, the work done can be calculated as the product of the force and the distance moved in the direction of the force. However, when a variable force is applied, the...
3.6K
Relative Motion Analysis - Velocity
354
A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
354

