Research on hydraulic servo control system for field test of ground motion parameters

Abstract

The hydraulic servo control system of the ground motion parameter field test system is introduced in this paper. The hydraulic servo control system mainly includes the seismic wave generating equipment system and the servo control system. And the equipment system consists of the P-wave and the S-wave generator. The main advantage of the hydraulic servo control system is that P-wave and S-wave generator can generate both p-wave and S-wave. The seismic waves produced are characterized by strong stability and high energy, which can overcome the shortcomings of instability, less energy and poor repeatability of the on-site wave generating device. It is necessary to generate the waveform of different types of seismic waves, such as sine wave, cosine wave, square wave and random wave. The vibration frequency of the seismic wave can be controlled to meet the actual demand of the seismic wave in engineering. The hydraulic servo control system can be run stably for a long time, without interference and unreliable operation in various environments and states, which can be of great significance for the seismic safety evaluation of the engineering site.