液压与气动2026，Vol.50Issue(9)：1-10,10.DOI:10.11832/j.issn.1000-4858.2026.09.001
基于液压变压器的动力输出系统压力-转速协同控制研究
Pressure-speed Coordinated Control of Power Take-off System Based on Hydraulic Transformer
摘要
Abstract
To suppress the main-circuit pressure pulsation and speed fluctuation of the variable-displacement motor of a wave energy hydraulic power take-off system,and to reduce the throttling loss caused by traditional valve control,a pressure-speed coordinated control method based on a hydraulic transformer is proposed.The proposed method uses a hydraulic transformer composed of a variable-displacement pump and a fixed-displacement motor as the pressure-flow conversion stage to replace the throttling pressure regulation stage of the traditional proportional flow valve.By regulating the displacement of the variable-displacement pump,the output flow of the hydraulic transformer is matched with the load demand,while the displacement regulation of the variable-displacement motor is used to improve the inlet pressure response,so that the hydraulic power take-off system can maintain relatively stable main-circuit pressure and output speed when wave height and period vary.Based on co-simulation with Simulink and AMESim,models of a valve-controlled throttling speed-regulation hydraulic power take-off system and a hydraulic power take-off system using the proposed constant-pressure and constant-speed control method based on a hydraulic transformer are established,and comparative simulations are carried out under varying wave conditions such as wave height reduction and period shortening.The results show that,compared with the traditional valve-controlled throttling speed-regulation system,the hydraulic power take-off system using the proposed constant-pressure and constant-speed control method based on a hydraulic transformer improves speed stability,reduces main-circuit pressure fluctuation,and exhibits faster response characteristics under sudden wave condition changes,providing a new approach for energy-saving optimization of wave energy hydraulic power take-off systems.关键词
波浪能/液压动力输出系统/液压变压器/容积节流调速/压力-转速协同控制Key words
wave energy/hydraulic power take-off system/hydraulic transformer/volumetric-throttling speed regulation/pressure-speed coordinated control分类
机械制造引用本文复制引用
张思晗,李世振,时文卓,李希彬,刘颖昕,赵丹瑶..基于液压变压器的动力输出系统压力-转速协同控制研究[J].液压与气动,2026,50(9):1-10,10.基金项目
山东省自然科学基金(ZR2025QA22) （ZR2025QA22）
国家自然科学基金(52505065) （52505065）
烟台开发区创新创业领军人才项目(2023RC005) （2023RC005）
