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Abstract: The
electro-hydraulic torque load simulator is typical torque servo control
systems with motion disturbance. The conventional mathematical model is
too simple for the study on the high precise load simulator, especially
on the description of motion disturbance. Normally the
structure-invariable principle is adopted to reduce disturbance based on
the simple model. There some difference between theory and practice. The
complex mathematical model of the load simulator is derived, which
discloses the characteristics of the system deeply. It proves the
extraneous force is not only related to the actuator velocity, but also
related to the actuator accelerator. Furthermore, the influence to the
system performance is analyzed. The test proves complex mathematical
model and indicates the validity for reducing the disturbance by speed
and accelerator feedforward.
Key words: Electro-hydraulic load simulator Extraneous force
Mathematical model Structure-invariable principle
CLC No: TH137
国家自然科学基金资助项目(50075006). Received 20020313, received in revised form
20020628
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