Action: MOVINGRESTRAINT

Module	bias
Description	Usage
Add a time-dependent, harmonic restraint on one or more variables.

Output components

This action calculates the values in the following table. These values can be referenced elsewhere in the input by using this Action's label followed by a dot and the name of the value required from the list below.

Name	Type	Description
bias	scalar	the instantaneous value of the bias potential
work	scalar	the total work performed changing this restraint
force2	scalar	the instantaneous value of the squared force due to this bias potential
_cntr	scalar	one or multiple instances of this quantity can be referenced elsewhere in the input file
_work	scalar	one or multiple instances of this quantity can be referenced elsewhere in the input file
_kappa	scalar	one or multiple instances of this quantity can be referenced elsewhere in the input file

Input

The arguments that serve as the input for this action are specified using one or more of the keywords in the following table.

Keyword	Type	Description
ARG	scalar	the labels of the scalars on which the bias will act

Further details and examples

Text from manual goes here

Syntax

The following table describes the keywords and options that can be used with this action

Keyword	Type	Default	Description
ARG	input	none	the labels of the scalars on which the bias will act
VERSE	compulsory	B	Tells plumed whether the restraint is only acting for CV larger (U) or smaller (L) than the restraint or whether it is acting on both sides (B)
STEP	compulsory	none	This keyword appears multiple times as STEPx with x=0,1,2,
AT	compulsory	none	ATx is equal to the position of the restraint at time STEPx
KAPPA	compulsory	none	KAPPAx is equal to the value of the force constants at time STEPx
NUMERICAL_DERIVATIVES	optional	false	calculate the derivatives for these quantities numerically