Control Performance and Energy-saving Potential Analysis of a Hydraulic Hybrid Luffing System for a Bergepanzer

Ning, C. N.; Chao, Zhiqiang; Li, Huaying; Han, Shousong

doi:10.1109/access.2018.2849215

Cited by 12 publications

(6 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[20][21][22][23] In terms of application, it has been applied in engineering machine field 24,25 and hybrid vehicle field. [26][27][28][29][30] However, the existing research and application of the IHT is essentially based on CPR (common pressure rail). 31 Although CPR system can control multiple components independently and has the advantages of energy saving, improving system efficiency and simplifying system structure, but the structure of CPR system is very different from valve-controlled load hydraulic system which used in most hydraulic equipment especially in construction machinery.…”

Section: Introductionmentioning

confidence: 99%

Four-port hydraulic transformer with inlet and outlet equal flow and its flow characteristics

Zhang

Zhou

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

Without changing the original valve control hydraulic system, a kind of hydraulic transformer, called four-port hydraulic transformer (FHT), is proposed to recover the energy loss caused by system throttling. The remarkable feature of FHT is that the flow rate at inlet and outlet ports are equal. This means that FHT can be connected into the load circuit of hydraulic system to recovery energy without refreshing flow rate. This paper investigates the flow characteristics of FHT, including instantaneous flow rates, average flow rates and flow pulsations in each port. The relationships between the structure of port plate and the flow characteristics are given. The variation rule of number of plungers connected to four ports is shown, and the relationship between the variation and the flow pulsation is revealed. The simulation results show that the flow rates and displacements of symmetrical ports are same, and the instantaneous flow rate of symmetrical ports has the same rule. The results also show the frequent changes of the number of plungers connected with each port lead to more flow jump points in instantaneous curves, and the jump point is the basic cause of its loud noise. The test shows that the flow rates of measurement data of the experiment are very close to the theoretical analysis, proved the theoretical analysis of flow characteristics for FHT are appropriate and reasonable, which has a certain reference for the development and energy-saving application for FHT.

show abstract

Section: Introductionmentioning

confidence: 99%

Four-port hydraulic transformer with inlet and outlet equal flow and its flow characteristics

Zhang

Zhou

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…However, at present, the research on hydraulic transformer mainly focuses on basic characteristics, such as pressure ratio, efficiency and energy saving application [22,23], and the research on stability and reliability is very limited, which is an important reason why it has not been widely manufactured and used.…”

Section: Introductionmentioning

confidence: 99%

Hydro-Dynamic Model and Low-Speed Stability Analysis of Hydraulic Transformer

et al. 2021

View full text Add to dashboard Cite

Hydraulic transformer is a significant component to develop the future energy saving hydraulic systems; however, the speed stability is one of the problems in such a machine because the rotor is unconstrained and the rotary inertia of the rotor is small. In this paper, aiming at the rotating speed of hydraulic transformer, a hydro-dynamic model of is proposed considering the nonlinear friction, oil compressibility and leakage. Both simulation and experiment are carried out to validate the hydro-dynamic model. Moreover, this paper theoretically analyzes the low-speed stability of hydraulic transformer based on the hydro-dynamic model for the first time. The mechanism of creep is discussed and the creep judgment method is presented. The influence of each parameter on creep is investigated, and the possible ways to avoid creep are explored. The calculations of the lowest stable rotating speed and the lowest stable flow rate without creep are given. This study is significant for the design and practical application of hydraulic transformer in the future. INDEX TERMSHydraulic transformer; hydro-dynamic model; low-speed stability; creep

show abstract

“…Although the NHT can theoretically achieve pressure conversion in any range, the transformation ratio and the system state quantities should be constrained in a reasonable range for component efficiency and performance. Dealing with the control problem of the NHT system with input delay and state constraints has become one of the important points in the application of the CPR system [12–15].…”

Section: Introductionmentioning

confidence: 99%

Speed tracking control for hydraulic transformer system based on active regulating common pressure rail

Shen

2020

IET Control Theory & Appl

View full text Add to dashboard Cite

This study investigates the speed tracking control problem for the new hydraulic transformer controlled system based on the active regulating common pressure rail with both input delay and strong interference. Firstly, the Pade approximation approach is adopted to approximate and compensate for the input delay of the valve plate rotating controlled by the hydraulic swing motor. Then, the Levant filter is introduced to solve the ‘explosion of complexity’ caused by repeated differentiation of the virtual control signals, and the compensation mechanism is constructed to compensate for the filtering errors. Besides, due to the strong non‐linear characteristics of the proposed system, the pi‐sigma fuzzy neural network is employed as the function approximator to address the non‐linear terms. Based on finite‐time command control technology and the barrier Lyapunov functionals, a robust controller is synthesised to ensure a better error convergence performance while without violating the state constraint. Finally, the effectiveness of the controller is verified by comparison with the traditional control method and simulation result.

show abstract

Control Performance and Energy-saving Potential Analysis of a Hydraulic Hybrid Luffing System for a Bergepanzer

Cited by 12 publications

References 23 publications

Four-port hydraulic transformer with inlet and outlet equal flow and its flow characteristics

Four-port hydraulic transformer with inlet and outlet equal flow and its flow characteristics

Hydro-Dynamic Model and Low-Speed Stability Analysis of Hydraulic Transformer

Speed tracking control for hydraulic transformer system based on active regulating common pressure rail

Contact Info

Product

Resources

About