Now let us suppose that load on the motor is taken into consideration. Then the problem of control becomes twofold. First, owing to fluctuations in the load, the armature current may change, resulting in change in the motor speed. Second, as a result of changes in speed, the armature resistance control must be accomplished in order to maintain the motor’s rated speed. Such control issues become very important in applications involving electric trains and a large number of consumer appliances making use of small batteries to run their motors. We wish to use concepts of fuzzy sets to address this problem. Let R ∼se be a fuzzy setrepresenting a number of possible values for series resistance, say sn values, given as