feat: add Exponential-2P distribution support and sanitize default parameters for Normal distribution and reliability intervals

src/aeros_equipment/service.py

@@ -337,6 +337,10 @@ def get_distribution_from_db(parameters: dict, is_repairable: bool = True, best_
         if method == "NHPP":
             beta = parameters.get("beta", 1.0)
             eta = parameters.get("eta", 100000)
+
+            if eta < 100:
+                eta = 15000
+
             return "NHPPTTFF", beta, eta
         elif method == "Weibull-2P":
             beta = parameters.get("beta", 1.0)
@@ -362,7 +366,7 @@ def get_distribution_from_db(parameters: dict, is_repairable: bool = True, best_
             sigma = parameters.get("sigma", 1)
             return "Lognormal", mu, sigma
         elif distribution == "Normal":
-            mu = parameters.get("mu", 0)
+            mu = parameters.get("mu", 100000)
             sigma = parameters.get("sigma", 1)
             if sigma > 1000 or sigma < 0:
                 sigma = 999
@@ -372,12 +376,18 @@ def get_distribution_from_db(parameters: dict, is_repairable: bool = True, best_
             beta = parameters.get("beta", 1.0)
             eta = parameters.get("eta", 100000)
             return "Weibull2", beta, eta
+        elif distribution == "Exponential-2P":
+            lambda_val = parameters.get("Lambda", 0.00001)
+            gamma = parameters.get("gamma", 0)
+            return "Exponential2", lambda_val, gamma
         else:
             # Default to Normal
-            mu = parameters.get("mu", 0)
+            mu = parameters.get("mu", 100000)
             sigma = parameters.get("sigma", 1)
             if sigma > 1000 or sigma < 0:
                 sigma = 999
+            if mu <=0 :
+                mu = 19000
             return "Normal", mu, sigma
     
 async def update_oh_interval_offset(*, aeros_db_session, overhaul_offset, overhaul_interval, project_name):
@@ -598,7 +608,10 @@ async def update_equipment_for_simulation(
                 eq.setdefault("cmDisP3", 0)
                 eq.setdefault("relDisP1", 0)
                 eq.setdefault("relDisP2", 0)
-                eq.setdefault("relDisP3", 0)
+            if eq.get("relDisType") == "Normal":
+                sigma = eq.get("relDisP2", 0)
+                if sigma > 1000 or sigma < 0:
+                    eq["relDisP2"] = 999
 
             eq["ohDisType"] = "Fixed"
             eq["ohDisP1"] = overhaul_duration