This article proposes an energy-saving hydraulic servo control system to output axial tension forces under cyclical disturbances in pipe fatigue tests. A hydraulic accumulator and a single-chamber control method were utilized to recover the energy generated by the external disturbance. For the increased potential hazard of pipe fracture in the proposed system, a parameter selection method was discussed, which also considered desired force control accuracy and low energy consumption. A proportional–integral–derivative controller with a model-based feedforward compensator was designed to achieve good force control performance. The mathematical and simulation models of the proposed system were established, and the simulation results indicated that the proposed system could achieve the desired force control accuracy. The energy consumption of the proposed system could be reduced by 71.0% in contrast to that of the traditional system in a case study. Also, the simulation results indicated that the control performance was robust to uncertainties of the disturbance noises, the effective bulk modulus, the internal leakage coefficient of the cylinder and the adiabatic gas rate.
WittenbergheJVPauwJDBaetsPD. Experimental determination of the fatigue life of modified threaded pipe couplings. Procedia Eng2010; 2: 1849–1858.
2.
NettoTALourencoMIBottoA. Fatigue performance of pre-strained pipes with girth weld defects: full-scale experiments and analyses. Int J Fatigue2008; 30: 767–778.
3.
API RP 17B:2002. Recommended practice for flexible pipe.
4.
BertiniLBeghiniMSantusC. Resonant test rigs for fatigue full scale testing of oil drill string connections. Int J Fatigue2008; 30: 978–988.
5.
HaagerMPinterGLangRW. Ranking of PE-HD pipe grades by fatigue crack growth performance. In: Proceedings of plastics pipes XIII, Washington DC, USA, 2–5 Oct 2006. USA: The Plastics Pipe Institute, Inc.
6.
BelmonteHMSMulheronMJSmithPA. Some observations on the strength and fatigue properties of samples extracted from cast iron water mains. Fatigue Fract Eng M2009; 32: 916–925.
7.
WangP. Design and research on the axial servo loading test system. Master Thesis, Department of Mechanical Engineering, Zhejiang University, Hangzhou, China, 2012.
8.
WittenbergheJVBaetsPDWaeleWD. Evaluation of fatigue crack propagation in a threaded pipe connection using an optical dynamic 3D displacement analysis technique. Eng Fail Anal2011; 18: 1115–1121.
9.
AhnKKTruongDQThanhTQ. Online self-tuning fuzzy proportional–integral–derivative control for hydraulic load simulator. Proc IMechE, Part I: J Systems and Control Engineering2008; 222: 81–95.
10.
ChiangMHChenCCJeffrey KuoCF. The high response and high efficiency velocity control of a hydraulic injection molding machine using a variable rotational speed electro-hydraulic pump-controlled system. Int J Adv Manuf Technol2009; 43: 841–851.
11.
TivayARezaeiSMBaghestanK. Energy-saving cooperative position tracking control of electro-hydraulic servo systems. In: Proceedings of the 2013 RSI/ISM international conference on robotics and mechatronics, Tehran, Iran, 13–15 Feb 2013, pp.511–516. USA: Curran Associates, Inc.
12.
ChiangMHChienYW. Integration of load-sensing control and path control on a hydraulic valve-controlled cylinder system. In: Proceedings of the 3rd international fluid power conference (IFK), Aachen, Germany, 5–6 Mar 2002, pp. 291–302. Germany: RWTH Aachen University.
13.
LovrecDKastrevcMUlagaS. Electro-hydraulic load sensing with a speed-controlled hydraulic supply system on forming-machines. Int J Adv Manuf Technol2009; 41: 1066–1075.
14.
ChiangMHYangFLChenYN. Integrated control of clamping force and energy-saving in hydraulic injection moulding machines using decoupling sliding-mode control. Int J Adv Manuf Technol2005; 27(1–2): 53–62.
15.
ChiangMHLeeLWTsaiJJ. Concurrent implementation of high velocity control performance and high energy efficiency for hydraulic injection moulding machines. Int J Adv Manuf Technol2004; 23(3–4): 256–262.
16.
ChiangMH. A novel pitch control system for a wind turbine driven by a variable-speed pump-controlled hydraulic servo system. Mechatronics2011; 21: 753–761.
17.
TruongDQAhnKK. Force control for hydraulic load simulator using self-tuning grey predictor-fuzzy PID. Mechatronics2009; 19: 233–246.
18.
LinjamaMVileniusM. Energy efficient motion control of a digital hydraulic joint actuator. In: Proceedings of the 6th JFPS international symposium on fluid power, Tsukuba, Japan, 7–10 Nov 2005, pp.640–645. Japan: The Japan Fluid Power System Society.
19.
LinjamaMLaamanenAVileniusM. Is it time for digital hydraulics? In: The eighth Scandinavian international conference on fluid power, Tampere, Finland, 7–9 May 2003. Finland: Tampere University of Technology.
20.
ZhangYLiAZhangW. Virtual experiment and research for heave compensation system. In: International conference on fluid power and mechatronics, Beijing, China, 17–20 Aug 2011, pp. 270–275. USA: The Institute of Electrical and Electronics Engineers.
21.
XuBYangJYangH. Comparison of energy-saving on the speed control of the VVVF hydraulic elevator with and without the pressure accumulator. Mechatronics2005; 15: 1159–1174.
22.
ClementsRAJamalNSheldrakeT. Riser strategies: fatigue testing and analysis methodologies for flexible risers. In: Offshore technology conference, Houston, Texas, 30 Apr–3 May 2008, pp.1–6. USA: Curran Associates, Inc.
23.
HassanTLiuZ. On the difference of fatigue strengths from rotating bending, four-point bending, and cantilever bending tests. Int J Pres Ves Pip2001; 78: 19–31.
24.
WuHWLeeCB. Influence of a relief valve on the performance of a pump/inverter controlled hydraulic motor system. Mechatraonics1996; 6: 1–19.
25.
JohnsenJSKarimiHRRobbersmyrKG. The harp: a vehicle crash test apparatus for full-scale crash test experiments. Int J Adv Manuf Technol2012; 63: 1073–1080.
26.
MerrittHE. Hydraulic control systems. New York: Wiley, 1967.
27.
PlácidoaJCRde MirandabPEVNettocTA. Fatigue analysis of aluminum drill pipes. Mater Res2005; 8(4): 409–415.
28.
SchwartzCDe NegriVJClimacoJV. Modeling and analysis of an auto-adjustable stroke end cushioning device for hydraulic cylinders. J Braz Soc Mech Sci2005; 7: 415–425.
29.
SamantarayAK. Modeling and analysis of preloaded liquid spring/damper shock absorbers. Simul Model Pract Theory2009; 17: 309–325.
AhnKKDinhQT. A case study of electro-hydraulic loading and testing technology for composite insulators based on iterative learning control. Proc IMechE, Part I: J Systems and Control Engineering2009; 227: 498–506.
32.
PlummerAR. Robust electrohydraulic force control. Proc IMechE, Part I: J Systems and Control Engineering2007; 221: 717–731.
33.
KimHMParkSHSongJH. Robust position control of electro-hydraulic actuator systems using the adaptive back-stepping control scheme. Proc IMechE, Part I: J Systems and Control Engineering2009; 224: 737–747.
