Developing of the anti-slip control of hydrostatic power transmission for forest tractor and optimisation of the power of diesel engine

Nevala, Kalervo; Penttinen, J.; Saavalainen, Pekka

doi:10.1109/amc.1998.743583

Cited by 5 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The blocks named as 'HST XY', where X equals R for the rear wheels and F for the front wheels and Y equals L for the left side and R for the right side of the machine, contain the HSTs. Since a HST is highly non-linear, the application of purely linear controllers like PI is limited, leading to control methods such as pole placement, 18 fuzzy logic for antislip control, 19,20 and hybrids of fuzzy logic and PI control. 21 Huhtala 5 discussed the application of a PI controller to a hydrostatic unit (pump or motor).…”

Section: Drivability Indexmentioning

confidence: 99%

Hydraulic power sharing on a hydrostatic transmission for a load–haul–dump for underground mines

Gosal¹,

Owen²,

Daneshmend³

et al. 2007

Mining Technology

View full text Add to dashboard Cite

Hydrostatic transmissions can be used to drive mining machines when the size of the machine restricts the use of mechanical transmissions. However, hydrostatic transmissions lack a differential effect and when the machine navigates around corners there is an increase in the amount of vibration and discomfort to the operator. Thus, a method of introducing a differential effect is required. Three different approaches to generate a differential effect are presented: the application of cheater lines (hydraulic sharing between the inlets and outlets of the hydraulic pumps), power sharing (hydraulic sharing between the hydraulic displacement control), and a method of incorporating articulation angle corrections to provide the differential effect in the desired speed. The effectiveness of a proportional-integral (PI) controller is also considered for comparison. This work found that cheater lines performed better than power sharing and performed similar to methods where the wheel speeds are adjusted based on the articulation angle of the machine.

show abstract

Section: Drivability Indexmentioning

confidence: 99%

Hydraulic power sharing on a hydrostatic transmission for a load–haul–dump for underground mines

Gosal¹,

Owen²,

Daneshmend³

et al. 2007

Mining Technology

View full text Add to dashboard Cite

show abstract

“…Power-split CVTs are also used for applications that demand an in nite or very large ratio coverage. High-power agri-cultural tractors are a special kind of vehicle where power-split CVTs can be used successfully [5,6 ]. Power-split CVTs di er from the most widely used CVTs for automotive applications [7][8][9][10][11][12][13][14] since they are characterized by the combination of a traditional discontinuous mechanical transmission and a continuously variable transmission (Fig.…”

Section: Problem Statement and Control Objectivesmentioning

confidence: 99%

On the design and tuning of the controllers in a power-split continuously variable transmission for agricultural tractors

Savaresi

Taroni²,

Prevedi

et al. 2003

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

In this work, a power-split continuously variable transmission (CVT) used in high-power tractors is considered. Power-split CVTs are characterized by the combination of a traditional discontinuous mechanical transmission and a continuously variable transmission. This provides, at the same time, smooth variations of the transmission ratio and high efficiency of the overall transmission system. The CVT considered in this paper is a hydrostatic power-split unit conceived for top-power agricultural tractors. The goal of this paper is to present a case study on the design and tuning of the control system structure for this type of CVT. This structure consists of three main parts: a servo controller on the internal current of the valve of the hydraulic transmission; a servo controller on the hydraulic transmission ratio; a synchronizer which coordinates the hydraulic and the mechanical parts of the CVT. The design, tuning and testing of this set of automatic controllers is presented.

show abstract

“…In the case of hydrostatic systems, satisfactory results in the wheel slip limitation are achieved by implementing flow dividers and appropriate types of hydraulic motors [37,38]. Better results can be obtained by using suitable control systems [35,36,39,40]. Moreover, Belyaev demonstrated [41] that active wheel speed and slip control, achieved by varying the pump's flow, provide higher power transmission efficiency compared to mechanical systems.…”

Section: Introductionmentioning

confidence: 99%

“…Analyzing the possibilities of controlling the rotational speed of hydraulic motors, two groups of solutions emerge: systems utilizing an external braking system and systems with active flow throttling [30,31,35,39]. Systems based on external brake systems are commonly used in cars today, known as anti-slip regulation (ASR) and electronic slip reduction (ESR).…”

Section: Introductionmentioning

confidence: 99%

Research on Terrain Mobility of UGV with Hydrostatic Wheel Drive and Slip Control Systems

Łopatka,

Cieślik,

Krogul

et al. 2023

Energies

View full text Add to dashboard Cite

The article explored the potential for enhancing the off-road mobility of unmanned ground vehicles (UGV) equipped with a hydrostatic drive system. The analysis showed that effectively overcoming rough or soft terrain demands a slip limitation. In the UGVs with hydrostatic drives, flow dividers are used for this purpose. Unfortunately, they have certain drawbacks, such as reduced efficiency due to pressure losses. In order to minimize this phenomenon, an external braking system was used as a new slip control system. Therefore, simulation studies were carried out to assess the new slip control system while overcoming terrain obstacles due to the reduction of energy consumption and improving the mobility of the UGV.

show abstract

Developing of the anti-slip control of hydrostatic power transmission for forest tractor and optimisation of the power of diesel engine

Cited by 5 publications

References 0 publications

Hydraulic power sharing on a hydrostatic transmission for a load–haul–dump for underground mines

Hydraulic power sharing on a hydrostatic transmission for a load–haul–dump for underground mines

On the design and tuning of the controllers in a power-split continuously variable transmission for agricultural tractors

Research on Terrain Mobility of UGV with Hydrostatic Wheel Drive and Slip Control Systems

Contact Info

Product

Resources

About