def poission_model():
module = Module("poission process")
module.addConstant(Constant('r', None))
# variable definition
v = Variable('n', 0, None, int, False) # n: int init 0;
module.addVariable(v)
# command definition
comm = Command('', lambda vs, cs: True,
lambda vs, cs: vs['n'].setValue(vs['n'].getValue() + 1),
module, module.getConstant("r"), CommandKind.NONE, None)
module.addCommand(comm)
# 增加label表示n>=4这个ap
labels = dict()
def nge4(vs, cs):
return vs['n'] >= 4
labels['nge4'] = nge4
model = ModulesFile.ModulesFile(ModelType.CTMC,
modules=[module],
labels=labels)
return model
def sps_model_dtmc(duration):
# duration: timer.day的最大值:天数
# timer module of the system
timer = Module('timer_module')
timer.addConstant(Constant('TIME_LIMIT', duration))
day = BoundedVariable(
'day', 1, range(timer.getConstant('TIME_LIMIT').get_value() + 1), int,
True)
timer_turn = BoundedVariable('timer_turn', True, set([True, False]), bool,
True)
timer.add_variable(day)
timer.add_variable(timer_turn)
def incdayaction(vs, cs):
vs['day'].set_value(vs['day'].get_value() + 1)
vs['timer_turn'].set_value(False)
inc_day = Command(
'inc day', lambda vs, cs: vs['timer_turn'] == True and vs['day'] <
timer.getConstant('TIME_LIMIT').get_value(), incdayaction, timer, 1.0)
timer.addCommand(inc_day)
# solar battery module of the system
sb = Module("solar battery module")
# set initial value None to denote uncertainty
screenthick = Constant('SCREEN_THICKNESS', None)
sb.addConstant(screenthick)
# the dose of one year: dose = K_SB * thickness
sb.addConstant(Constant('SB_K', 0.0039))
sb.addConstant(Constant('SB_B', 12))
sb.addConstant(Constant('SB_P_THRESHOLD', 0.7))
sb.addConstant(Constant('SB_A_MU', 0.1754))
sb.addConstant(Constant('SB_A_SIGMA', 0.02319029 * 21))
# variables
sb_status = BoundedVariable('sb_status', 1, range(2), int, True)
sb.add_variable(sb_status)
def failaction(vs, cs):
vs['sb_status'].set_value(0)
vs['timer_turn'].set_value(True)
# use closure to delay the computation of fail rate
def f1(day_var):
def failprobsb():
# return the failure probability of solar battery after day-dose
niel_dose = sb.getConstant('SB_K').get_value() * sb.getConstant(
'SCREEN_THICKNESS').get_value() * (day_var.get_value() / 365.0)
x = (1 - sb.getConstant('SB_P_THRESHOLD').get_value()) / \
log(1 + niel_dose * sb.getConstant('SB_B').get_value())
std_x = (x - sb.getConstant('SB_A_MU').get_value() /
sb.getConstant('SB_A_SIGMA').get_value())
temp = pcf(std_x)
i = id(day_var)
return 1 - temp
return failprobsb
def f1n(day_var):
def normalprobsb():
niel_dose = sb.getConstant('SB_K').get_value() * sb.getConstant(
'SCREEN_THICKNESS').get_value() * (day_var.get_value() / 365.0)
x = (1 - sb.getConstant('SB_P_THRESHOLD').get_value()) / \
log(1 + niel_dose * sb.getConstant('SB_B').get_value())
std_x = (x - sb.getConstant('SB_A_MU').get_value() /
sb.getConstant('SB_A_SIGMA').get_value())
return pcf(std_x)
return normalprobsb
comm_fail = Command(
'solar battery failure command',
lambda vs, cs: vs['sb_status'] == 1 and vs['timer_turn'] == False,
failaction,
sb,
f1(timer.getVariable('day')),
kind=CommandKind.FAILURE)
sb.addCommand(comm_fail)
comm_normal = Command(
'solar battery stay-normal command',
lambda vs, cs: vs['sb_status'] == 1 and vs['timer_turn'] == False,
lambda vs, cs: vs['timer_turn'].set_value(True), sb,
f1n(timer.getVariable('day')))
sb.addCommand(comm_normal)
s3r = Module('S3R模块')
s3r.addConstant(screenthick)
s3r.addConstant(Constant('S3R_K', 200.5 / 3.0)) # s3r, bdr, bcr三个模块均摊电离能损
s3r.addConstant(Constant('S3R_DELTAV_THRESHOLD', 450))
s3r.addConstant(Constant('S3R_A_MU', 570.8 * 18))
s3r.addConstant(Constant('S3R_A_SIGMA', 6.7471 * 120))
s3r.addConstant(Constant('S3R_B', 0.01731))
s3r_status = BoundedVariable('s3r_status', 1, range(2), int, True)
s3r.add_variable(s3r_status)
def s3rfailaction(vs, cs):
vs['s3r_status'].set_value(0)
vs['timer_turn'].set_value(True)
def f2(day_var):
def failprobs3r():
iel_dose = day_var.get_value() / 365.0 * (s3r.getConstant('S3R_K').get_value() / \
s3r.getConstant('SCREEN_THICKNESS').get_value())
x = s3r.getConstant('S3R_DELTAV_THRESHOLD').get_value() / (
s3r.getConstant('S3R_B').get_value() *
pow(e,
s3r.getConstant('S3R_B').get_value() * iel_dose))
std_x = (x - s3r.getConstant('S3R_A_MU').get_value()) / \
s3r.getConstant('S3R_A_SIGMA').get_value()
return 1 - pcf(std_x)
return failprobs3r
def f2n(day_var):
def normalprobs3r():
iel_dose = day_var.get_value() / 365.0 * (s3r.getConstant('S3R_K').get_value() / \
s3r.getConstant('SCREEN_THICKNESS').get_value())
x = s3r.getConstant('S3R_DELTAV_THRESHOLD').get_value() / (
s3r.getConstant('S3R_B').get_value() *
pow(e,
s3r.getConstant('S3R_B').get_value() * iel_dose))
std_x = (x - s3r.getConstant('S3R_A_MU').get_value()) / \
s3r.getConstant('S3R_A_SIGMA').get_value()
return pcf(std_x)
return normalprobs3r
s3r_comm_fail = Command(
's3r failure command',
lambda vs, cs: vs['s3r_status'] == 1 and vs['timer_turn'] == False,
s3rfailaction, s3r, f2(timer.getVariable('day')), CommandKind.FAILURE)
s3r.addCommand(s3r_comm_fail)
s3r_comm_norm = Command(
's3r normal command',
lambda vs, cs: vs['timer_turn'] == False and vs['s3r_status'] == 1,
lambda vs, cs: vs['timer_turn'].set_value(True), s3r,
f2n(timer.getVariable('day')))
s3r.addCommand(s3r_comm_norm)
def failureif(vs, cs):
return vs['s3r_status'] == 0 or vs['sb_status'] == 0
labels = dict()
labels['up'] = lambda vs, cs: vs['s3r_status'] == 1 and vs['sb_status'
] == 1
labels['failure'] = lambda vs, cs: vs['s3r_status'] == 0 or vs['sb_status'
] == 0
i = id(timer.getVariable('day'))
model = ModulesFile.ModulesFile(ModelType.DTMC,
modules=[timer, sb, s3r],
failureCondition=failureif,
labels=labels,
stopCondition=failureif)
ii = id(model.localVars['day'])
assert i == ii
return model
