ARITHMETIC UNIT AND SUSPENSION CONTROL SYSTEM EMPLOYING THE ARITHMETIC UNIT

摘要

PURPOSE: To perform both operation and control high in reliability using an inexpensive microcomputer by dividing operation processing having a large quantity of operation every reference control period, and thereby making the quantity of divided operation including other operation to be processed by each period, processable. ;CONSTITUTION: Signals from a watch dog timer 11, various types of sensors such as vehicle speed and the like, and switches 26 through 30 are inputted to a CPU 12, and the result of operation is outputted to actuators 31 through 34, so that damping force is thereby adjusted. Yet, the CPU judges whether or not interruption is processed depending on a set condition of information on identification at the time of interruption every reference period by an interval timer, releases a set of information on identification, divides the aforesaid set into a processable quantity, and goes into interruption processing. And in the interruption processing, a first operation for one time is performed, a second operation other than the first operation is performed, the timer 11 is initialized, and the order of operations within the first operation is determined, and these processing is formed into a loop. By this constitution, when a program for processing is recklessly executed, since the CPU can be reset, high reliability can thereby be obtained using the inexpensive microcomputer.;COPYRIGHT: (C)1995,JPO