Planning Based On OBDD & Model Checking Method

Planning is two main realms that current artificial intelligence inside a realm that cause the interest of bigness, it joined together the artificial intelligence:Search for with the logic.Planning machine since can be seen as procedure that manhunt solve, also can be seen as the procedure that proof solution exsits. Planning is the best action in a series that a core technique within artificial intelligence, how the main research be attained the target, canning be then extensive to apply in the industry, space system, software engineering, robot, educate to wait with amusement the each realm, have got the vast development foreground. The planning method of the earlier period contain appearance space search for the method, be partial to the preface planning method, program the diagram method and set question the logic mean the traditional method in etc. in method.One of their common characteristics be function that demand for maintain the system unify the sex but make large quantity have nothing to do with target the redundancy works, from but causes the system suffer the bar.This text introduced how to make use of the OBDD( face two dollar decision diagram) this a special data construction, adoption model examination method to resolve to program the problem.According to relate to the special of the product in the OBDD with the characteristic that exsitting and measuring phrase, proceeded the demarcation to the conversion relation, and put forward the deal to turn this method in advance, making complicated degree that relate to the product lowered consumedly. This text did to the method of solution of the current familiar Planning problem first in brief of introduction, and contrasted to out each from of merit and shortcoming, then introduce the model examination method, pass to contrast the model examination problem different from likeness that program the problem with, the elucidation can adopt the model examination method to resolve the problem of planning. The model examination belongs to the calculate way of the sex verification concerning the system with the method, is a kind of automatic school proved prescription method that limited appearance erupt the system.It usually adopts the method that appearance space search for to examine whether a calculation for giving settling model satisfy or not a certain meaning particular to belong to the sex with the cycle time logic formula. The model examination is already successful of were applied to control in the electric circuit to negotiate to wait the realm with the communication, use to look for the small mistake, most important of is this process is over and full-automatic.Usually, the customer provides the model high to mean with the cycle time logic formula that will examine, model examination calculate way will answer that formula as to really combine be over, meaning that model satisfy this formula,or give a versa an enunciation why that formula not is satisfied. The planning problem can use the model examination method solution.The area of planning is to passes the language righteousness model to describe of.The action that it defined the appearance of the area and can carry out with output state change because carrying out of action.The problem of planning is at the area of planning, beginning that give premise that settling and starting the appearance, target appearance the problem that descend find out a behavior Planning.The creation of the Planning is an appearance to pass to expand the language righteousness model space to realize of.Model the examination is a model with the main and different of the certain planning problem the examination returns true or false, however what planning return is a planning or a failure information. Resolving with the model examination method the problem of planning is to bases on to launch the planning problem change automatic machine in limited appearance.Pass the model examination method to equal to the Planning that look for a planning problem to look for in automatic machine that meant area a conjunction beginning start the appearance with an appearance path that target gather the inside.Each change of the automatic machine means that carry out an operation in a particular appearance. The automatic machine in limited appearance is to has thelong-lost inputting output's mathematics model.Automatic machine importation accepting certainly, action carrying out certainly, the creation is certain of result, positive with the creation process of the planning resemble.The sign that pass the conversion relation means, we uses the boolean algebra converts to proceed the automatic machine that appearance describe out. The OBDD is compact to describe the boolean function with the powerful data construction, is every kind of research realm for example model examination with hardware electric circuit proof and synthesize inside a count for much tool.The positive that pass the OBDD means, it is already valid the applied synthesizing in the hardware electric circuit examines the problem with proof etc. model center.The boolean function can mean the appearance space with the sign, meaning because of the spatial recessive in this kind of appearance, therefore according to the OBDD manhunt can usually investigate the very big appearance space. Our usage OBDD contain two purposes:Mean that the appearance gathers with the change that mean the appearance.The appearance passes the characteristic function to mean, function the value is true be and only be the binary system of the appearance code is satisfied.Manage together, we can pass a relation for raising first all a sets to meaning the appearance.Because according to the OBDD sign appearance space means with search for the calculate way can enlarge very naturally not certain area, for this reason OBDD very in keeping with solution not certain Planning problem.According to the model examines the Planning of the method is to bases on to satisfy the examination of, therefore adopt the OBDD can avoid or can reduce to increase along with the problem scale at least but the price that index number class result in when increasing of the boolean formula that cause. We use the OBDD to examine the method with the model to the tightly packed of proceed to the automatic machine the coding mean, combining the proceeding appearance space investigate.Because state graph is pass what boolean function mean, therefore has no necessity the real constructing show to build the change relation sexually.Manage together, the appearance gathers to also mean with the boolean function of, therefore can good solution appearance space Bang problem. Have developped several a Planning for according to modelexamining methods machine in the world now, but the common weakness of these systemses is with a boolean function to mean whole planning area inside appearance a calculation for of conversion relating to, from and causing conversion relation very complicated, save to mean that the conversion relation a space for needing uses with boolean function of change the deal number may report the index number class increases, programing to beg to solve a time for needing to also increase consumedly with the space.In this system, applies to the model examination method the inside the latest research result ——the technique" partition" in the planning center, relate the conversion to demarcation at the same time many statures express the type matches to take, and couplet of calligraphy express the type proceeded the row preface.Pass the demarcation to relate to to conversion to compute the in proper order row preface with the couplet of calligraphy expresses type, lower the saving spatial need, also lowered to compute the complexity. This text from define a planning problem area describe the language OMDL, combining the exploitation LEX is very mighty to edit and translate the tool with YACC these two kinds of functions born the OMDL edits and translate the machine phoneticly, from but convert the problem a data for needing construction, realizes at the same time according to should phonetic Planning system MODEL_PLANNER, finally, to MODEL_PLANNER system a method for adopting proceeding evaluation, and pointed out several a research for comparing having foregrounds direction.