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GolgiTendonOrgan.f90
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GolgiTendonOrgan.f90
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! '''
! Neuromuscular simulator in Fortran.
! Copyright (C) 2018 Renato Naville Watanabe
! This program is free software: you can redistribute it and/or modify
! it under the terms of the GNU General Public License as published by
! the Free Software Foundation, either version 3 of the License, or
! any later version.
! This program is distributed in the hope that it will be useful,
! but WITHOUT ANY WARRANTY; without even the implied warranty of
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! GNU General Public License for more details.
! You should have received a copy of the GNU General Public License
! along with this program. If not, see <http://www.gnu.org/licenses/>.
! Contact: renato.watanabe@ufabc.edu.br
! '''
module GolgiTendonOrganClass
! '''
! Class that implements a muscle spindle model.
! '''
use ConfigurationClass
implicit none
integer, parameter :: wp = kind(1.0d0)
real(wp), parameter :: pi = 4 * atan(1.0_wp)
private
public :: GolgiTendonOrgan
type GolgiTendonOrgan
type(Configuration), pointer:: conf
character(len = 6) :: muscle
real(wp) :: IbFR_Hz
real(wp) :: x1, x2, Gg
contains
procedure :: atualizeGolgiTendonOrgan
procedure :: reset
end type GolgiTendonOrgan
interface GolgiTendonOrgan
module procedure init_GolgiTendonOrgan
end interface GolgiTendonOrgan
contains
type(GolgiTendonOrgan) function init_GolgiTendonOrgan(conf, muscle)
! '''
! Constructor
! - Inputs:
! + **conf**: Configuration object with the simulation parameters.
! + **muscle**: string with the muscle to which the muscle spindle belongs.
! '''
class(Configuration), intent(in), target :: conf
character(len = 6), intent(in) :: muscle
character(len = 80) :: paramTag, paramChar
real(wp) :: AFnumber
! ## Configuration object with the simulation parameters.
init_GolgiTendonOrgan%conf => conf
init_GolgiTendonOrgan%muscle = muscle
init_GolgiTendonOrgan%x1 = 0.0
init_GolgiTendonOrgan%x2 = 0.0
init_GolgiTendonOrgan%IbFR_Hz = 0.0
paramTag = 'Number_Ib-' // trim(muscle)
paramChar = init_GolgiTendonOrgan%conf%parameterSet(paramTag, muscle, 0)
read(paramChar, *)AFnumber
init_GolgiTendonOrgan%Gg = 60.0 / AFnumber !Hz
print '(A)', 'Golgi Tendon Organ from muscle ' // trim(init_GolgiTendonOrgan%muscle) // ' built.'
end function
subroutine atualizeGolgiTendonOrgan(self, t, tendonForce)
! '''
! Atualize the dynamical and nondynamical (delay) parts of the motor unit.
! - Inputs:
! + **t**: current instant, in ms.
! '''
class(GolgiTendonOrgan), intent(inout) :: self
real(wp), intent(in) :: t, tendonForce
real(wp) :: Gf, Rgn, RgfSlope, RgfDotSlope, Rgf
Gf = 4.0 !unidade N
Rgn = self%Gg*log(tendonForce/Gf + 1) !Equação 19 Tese de Doutorado LAE
RgfSlope = self%x2
RgfDotSlope = -0.4 * self%x1 - 2.2 * self%x2 + Rgn
self%x1 = self%x1 + self%conf%timeStep_ms * RgfSlope
self%x2 = self%x2 + self%conf%timeStep_ms * RgfDotSlope
Rgf = -11.2 * self%x1 - 46.4 * self%x2 + 68 * Rgn
if (Rgf > 0) then
self%IbFR_Hz = Rgf
else
self%IbFR_Hz = 0.0
end if
end subroutine
subroutine reset(self)
! '''
! '''s
class(GolgiTendonOrgan), intent(inout) :: self
self%x1 = 0.0
self%x2 = 0.0
self%IbFR_Hz = 0.0
end subroutine
end module GolgiTendonOrganClass