Isight高级教程.ppt

Application Programming InterfacesAPIs iSIGHT Advanced Training Pratt Whitney November 29 and 30, 2001 API Application programming interfaces (API) link customized Tcl code to iSIGHT APIs are Tcl procedures developed by Engineous which allow the user to access internal information in iSIGHT There are over 150 API calls in iSIGHT API and Tcl API calls are Tcl commands May be used and nested with other Tcl commands May be used in all MDOL blocks which support Tcl Will not work in a generic Tcl interpreter - it only works within iSIGHT Likely Place to Use Prologue Epilogue TaskProcess TaskPlan Anywhere that supports Tcl With Tcl, Why API? In some situations, both Tcl and API work, but API is suggested. API will always be supported by iSIGHT, but Tcl may not be. A suggested practice is to use API as much as possible. Example Print the run counter to the log window for each run ( RC #12, for example) TaskProcess Airplane Control: [ Tcl puts “RC #[api_GetRunCounter Airplane].” End Tcl AeroCode ] End TaskProcess Airplane Example DOE+RSM : speed reducer Lab Assume that the design space is primarily infeasible with small pockets of feasibility Use exploratory technique (Simulated Annealing) followed by a numerical technique (Modified Method of Feasible Directions) to locate optimum Add a Tcl algorithm to increase the chances of getting to a global optimum Default iSIGHT Behavior Customized iSIGHT Behavior Tcl Algorithm Psuedo Code: Run SA Copy Airplane.db to SAPoints.db Open SAPoints.db While data exists, read each line If Feasibility = 7 Foreach iSIGHT Parameter Set iSIGHT Parameters = value in column End Foreach Run MMFD End If End While Useful API Calls api_GetTaskName Returns the name of the task in which api is called api_EvaluateTechnique step-name Runs an iSIGHT optimization technique api_GetTaskInputs task-name Returns a list of the inputs for a task api_SetParameterValue task-name parm-name value