Abstract
The use of electrohydraulic control systems in vehicles has increased considerably in recent years, and these systems are continually becoming more advanced and sophisticated. In developing these systems, it is essential to conduct in-vehicle tests to evaluate vehicle dynamics and operation of the hydraulic system under development. With the aim of evaluating such systems in detail in bench tests, the authors have developed a real-time hardware-in-the-loop simulator. With this simulator, a vehicle numerical model is linked to an actual electrohydraulic control system to calculate the model in real time in combination with the operation of the system. As a result, experimental data nearly equal to the results of in-vehicle testing can be obtained in bench tests. Trial use of the simulator shows that it can be applied to many kinds of performance evaluations, except “feel” assessments, and is a useful tool in system development work.
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