Command shaping for micro-mills and CNC controllers

Fortgang, Joel; Singhose, William; Márquez, Juan J.; Pérez, Juan Ignacio Asensio

doi:10.1109/acc.2005.1470710

Cited by 15 publications

(15 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Command-shaping techniques generate the input to the system in such a way as to minimize deflection and/or vibration. This is accomplished by having the vibration resulting from some components of the command interfere destructively with vibration induced by other components in the command [20][21][22][23][24][25]. In this work, command shaping is used to design the signal sent to the controller positioning system.…”

Section: Command-shaping Controlmentioning

confidence: 99%

Command shaping control for micro-milling operations

Fortgang

Singhose

Márquez

et al. 2011

Int. J. Control Autom. Syst.

View full text Add to dashboard Cite

Micro milling requires both high speed and high accuracy in order to economically produce parts with features on the scale of 1 µm. Micro mills are smaller and more flexible than traditional large-scale machines. Therefore, vibration of the machine structure is a significant problem. Given that micro milling requires high positioning precision, even small vibrations in the controller dynamics are problematic. The small-scale operation has considerably lower tool/workpiece interaction forces than traditional-scale milling. These low cutting forces have minimal effect on the machine structural response. Therefore, the dominant dynamic factor in exciting vibration can be the machine tool motion, rather than the workpiece/tool interaction. Given this realization, properly shaping the motions of the micro mill is a promising approach to reduce vibration. This paper presents a nonlinear commandshaping technique to reduce the vibrations of a micro mill that can be implemented with a standard CNC controller. The robustness of this technique to modeling errors and disturbances is investigated. Theoretical proofs and experimental demonstrations of the command-shaping technique are presented. The improved performance from the command shaping enables higher throughput and improved accuracy of the micro mill.

show abstract

Section: Command-shaping Controlmentioning

confidence: 99%

Command shaping control for micro-milling operations

Fortgang

Singhose

Márquez

et al. 2011

Int. J. Control Autom. Syst.

View full text Add to dashboard Cite

show abstract

“…Successful applications of input shaping have also been reported on the related problems of controlling XY stages, [128][129][130][131][132][133] flexible robotic arms, 18,28,51,62,65,66,68, and voice coil motors. 157 Implementation on these types of industrial machines may require the input-shaping algorithm to deal with friction, 116,158,159 saturation, 75,160 or rate limiting.…”

Section: Example Applicationsmentioning

confidence: 99%

Command shaping for flexible systems: A review of the first 50 years

Singhose

2009

Int. J. Precis. Eng. Manuf.

361

179

View full text Add to dashboard Cite

“…This engineering solution, based on the idea of oscillation damping by means of generating regulating pulses that are antiphase to the oscillations, i. e. by means of redistributing the regulating input in terms of time and relating it to dynamic properties of the system, is implemented by the method which is known as Input Shapers [2][3][4][5][6]. This method is widely used in various commercial applications, and it has resulted in improving performances of various units: satellite systems [7], disk drives [8], cranes [9][10][11], coordinate measuring machines [12,13], remotely piloted planes [14], milling machines, etc.…”

Section: Analysis Of Low-frequency Oscillations Occurring In Transienmentioning

confidence: 99%

Increasing the Quality of Transient Processes in the Vehicle Transmission

2019

View full text Add to dashboard Cite

The paper shows results of an experimental and theoretical study of dynamic processes in the vehicle transmission after kinematic alignment of elements during gearshifts. The purpose of the research is increasing the quality of transient processes in the vehicle transmission. Applying an analysis of experimental results obtained through looking into dynamics of a 3-ton vehicle transmission and studying literature sources it was established that dynamic loading of the transmission after the kinematic stage of shifting (i. e. synchronizing speeds of driving and driven elements in the gearbox) is influenced by oscillations which are in the single-node mode. Solving the task of increasing transient processes is achieved by applying a method of control power redistribution. By employing simulation models a number of methods were used to regulate power redistribution. Results of computations made it possible to determine that the efficiency of power redistribution are closely related to initial conditions of the process under the study. In the progress of the research a method for identifying the initial conditions was developed. This method is based determining signatures of the torque and its derivatives. In accordance with the research results it turned out that it is appropriate to apply the ZVD (zero vibration derivation) algorithm of power redistribution for low gears (below 4th) from point of view achieving better overshoot and robustness characteristics and a satisfactory response rate level. For higher gears it is recommended that the Ramp algorithm (linear increase in the control input) be used for the cases when the response rate is not longer than period of the single-node mode of oscillations occurring in the dynamic system during a gear shift. Application of the proposed algorithms allows to bring down dynamic loading of the transmission and also to improve the comfort in vehicles.

show abstract

Command shaping for micro-mills and CNC controllers

Cited by 15 publications

References 11 publications

Command shaping control for micro-milling operations

Command shaping control for micro-milling operations

Command shaping for flexible systems: A review of the first 50 years

Increasing the Quality of Transient Processes in the Vehicle Transmission

Contact Info

Product

Resources

About