[添加]opcua exporter

opcua-expoter/fault-simulation-algorithm/step/step.cpp

@@ -0,0 +1,23 @@
+//
+// Created by baiguwen on 2022/4/20.
+//
+#include "step.h"
+#include <iostream>
+
+void step::set_config(const nlohmann::json &config) {
+    try {
+        amplitude_base_ = jsonValue(config, "STEP_AMPLITUDE_BASE");
+        config_         = config;
+    } catch (...) {
+
+    }
+}
+
+nlohmann::json step::config() {
+    return config_;
+}
+
+
+double step::eval(double value) {
+    return value + amplitude_base_;
+}