YggSimLib 0.91

A library for interfacing with the kspice API for the Yggdrasil project

YggSimLib

Introduction

YggSimLib is a wrapper library that simplifies working with K-Spice for the Yggdrasil Engineering Simulator.
It consists of two main functionalities

• Wrapping object operations
• Setting up sequences/scenarios that can be programmed to execute in a pre-set order

Object Wrapping

The Yggdrasil Engineering Simulator makes use of several object types to represent for instance on/off valves. Each object type can have different parameters that needs to be set in order to i.e. open the valve. The YggSimLib.On_Off_Valve object simplifies operations on valves, exposing a single open() method that behind the scenes sets the correct parameter on the K-Spice object.
The following types are implemented:

• On_Off_Valve
  • Wraps MotorOperatedValve, BlockValve and LedaValve
• Motor_Heater
  • Wraps ControlledAsynchronousMachine and ControlledElectricHeater
• PID
  • Wraps PidController
• Choke
  • Wraps ControlValve and LedaValve (acting as a choke)
• Transmitter
  • Wraps AlarmTransmitter

Sequencing

Sequencing / Scenario building are supported through the classes Step, Sequence and Admin. The Step class lets the user define a set of actions to be performed. When the actions has been initiated, a set of transition conditions can be configured that will allow the step to complete within a maximum time limit (simulation clock). Each step is configured so it contains the name of the next step. A set of Steps can be collected in Sequence object. The Sequence object will execute the steps in the order configured by the steps themselves, and also allows a set of inhibit conditions to be set that will disalow the sequence from starting. Finally, a set of Sequence objects can be collected in an Admin object. Together with the Sequences, this class requires a set of relations between the sequences that dictates execution order, allowing for both parallell and serial execution of the sequences. These relations are configured as a set of edges connecting the sequence names.