Updated default controller

src/controller.rs

@@ -51,6 +51,9 @@ impl PIController {
             old_h: initial_h,
         }
     }
+    pub fn default() -> Self {
+        Self::new(0.17, 0.04, 10.0, 0.2, 10.0, 0.9, 1e-4)
+    }
 }
 
 #[cfg(test)]

src/problem.rs

@@ -145,7 +145,7 @@ mod tests {
 
         let ode = ODE::new(&derivative, 0.0, 1.0, y0);
         let dp45 = DormandPrince45::new(1e-12_f64, 1e-5_f64);
-        let controller = PIController::new(0.17, 0.04, 10.0, 0.2, 0.1, 0.9, 1e-8);
+        let controller = PIController::default();
 
         let mut problem = Problem::new(ode, dp45, controller);
 
@@ -162,7 +162,7 @@ mod tests {
 
         let ode = ODE::new(&derivative, 0.0, 5.0, y0);
         let dp45 = DormandPrince45::new(1e-12_f64, 1e-5_f64);
-        let controller = PIController::new(0.17, 0.04, 10.0, 0.2, 0.1, 0.9, 1e-8);
+        let controller = PIController::default();
 
         let value_too_high = Callback {
             event: &|_: f64, y: SVector<f64,3>| { 10.0 - y[0] },
@@ -183,7 +183,7 @@ mod tests {
 
         let ode = ODE::new(&derivative, 0.0, 10.0, y0);
         let dp45 = DormandPrince45::new(1e-12_f64, 1e-6_f64);
-        let controller = PIController::new(0.17, 0.04, 10.0, 0.2, 0.1, 0.9, 1e-8);
+        let controller = PIController::default();
 
         let mut problem = Problem::new(ode, dp45, controller);
         let solution = problem.solve();