Hydraulic System Simulation 液压系统模拟

航空发表于 2010-7-31 16:19:31

Hydraulic System Simulation 液压系统模拟
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航空发表于 2010-7-31 16:19:42

Hydraulic System Simulation Delphine HERTENS T1.1.2 Leader. Hydraulic System Engineer AIRBUS VIVACE Forum 2, The Hague, Netherlands Oct. 24-26, 2006 © 2006 VIVACE Consortium Members. Page: 2 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Hydraulic system task context 􀀹 Objectives of the task – Increase the level of simulation in hydraulic system design – Increase hydraulic system simulation fidelity to contribute to design cycle and costs reduction 􀀹 Hydraulic System simulation contributes to the renewal of the systems development process by providing to flight controls and handling qualities teams the most realistic hydraulic model at the earliest © 2006 VIVACE Consortium Members. Page: 3 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Hydraulic system overview 􀀹 Basic function of Aircraft Hydraulic system: to provide required power to hydraulic consumers which are (mainly): - Flight control surfaces (ailerons, elevator, rudder, spoilers, flaps…) - Landing gear systems (extension and retraction, braking, steering…) - Cargo doors, thrust reversers… 􀀹 Main components of Hydraulic system: - Pumps - Valves - Filters - Reservoir - Indicating devices - Pipes and fittings… HSMU RAT PUMP ENGINE 1 ENGINE 2 ENGINE 3 ENGINE 4 AILERONS SPOILERS AILERONS SPOILERS RUDDER ELEVATOR ELEVATOR HYD SYS Hydraulic Reservoir © 2006 VIVACE Consortium Members. Page: 4 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Hydraulic system simulation Iterative work for sizing and optimisation of: - Hydraulic system - Hydraulic consumers - Flight control laws HYDRAULIC SYSTEM CONSUMERS Flight control laws Handling quality A/C behaviour towards pilot order © 2006 VIVACE Consortium Members. Page: 5 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Hydraulic task scenarios SCENARIO 1 PRE-DESIGN MODEL Scenario completed Pre-design model 􀀹Available early 􀀹Real time 􀀹Integration in flight control simulation platforms (multi-systems) 􀀹Base for more complete models (later) =>Improve flight control tests cases fidelity =>Reduce iterations, and iterations time between hydraulic system and flight control laws / handling quality =>Earlier optimisation of hydraulic generation Tool: SCADE Realistic but nevertheless simple, as required 􀀹System level 􀀹Flight control laws and handling quality specialists use DELIVERABLE TITLE by Author (Company) Abstract: This document describes… Dissemination: Deliverable/Output n°: Issue n°: Keywords: Detailed model 􀀹Non real time 􀀹Physical dynamic modelling 􀀹Stand-alone simulation 􀀹Coupled simulation with flight control simulation platform (not integrated in multi-systems simulation platforms) =>Improve hydraulic model fidelity =>Hydraulic system detailed performances and behaviour status =>Earlier system verification and validation =>Reduce Iron Bird and flight tests SCENARIO 2 DETAILED Tool: SABER MODEL On-going work 􀀹System level 􀀹Hyd system specialists use More accurate © 2006 VIVACE Consortium Members. Page: 6 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Zoom on scenario 1: hydraulic pre-design model OCASIME OCASIME: 􀀹 desk top simulator workshop 􀀹 piloting function and virtual cockpit • Pre-design model integration and interfaces OCASIME Flight Control Laws application Hydraulic circuits pressure level indications Hydraulic consumers: ATA27 ATA32 … Hydraulic pre-design model Engine EDP rotational speeds Required flows Available delta-pressures User settings Fluid temperature EDP manual switch off Fluid choice ATA27 regulation © 2006 VIVACE Consortium Members. Page: 7 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Zoom on scenario 1: hydraulic pre-design model Main characteristics of the pre-design model (model content) 􀀹 Improvement of hydraulic elements modelling (manifolds, filters, priorityvalves pressure drop) 􀀹 Choice between two types of fluids (high or low density) 􀀹 Choice of the fluid temperature (1) 􀀹 Priority valves (2) and low pressure switches logics modelled 􀀹 Engine driven pumps model using static curves (pressure / flow). Overflow functioning part represented (3) 􀀹 Engine driven pumps switch off possible (apart from engine state) (4) => (1) / (2) / (3) / (4) 􀃆 Simulations with insufficient hydraulic power possible (impact analysis) 􀀹 Overflow functioning detection function 􀀹 Interfaces compatibility with consumers models evolutions © 2006 VIVACE Consortium Members. Page: 8 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Zoom on scenario 1: hydraulic pre-design model Pre-design model other advantages: 􀀹 Integration into the complete hydraulic system model, including monitoring and regulation functions and several accuracy levels - Scade (language commonality) - Development rules compatible with Airbus official procedure - Upstream work with other simulation developers allowing: to take benefit from previous aircraft simulation experience to build compatible cross-models architectures 􀀹 Hydraulic models library creation (sub-parts “ready for use” for new aircraft predesign model) - Fluid data - Fluid properties calculation (fluid data use) - EDP - Manifold - Priority valve - Low pressure switch - Pressure drops calculations (linear, singular, total), pressures calculation - Consumers pressures handling for display © 2006 VIVACE Consortium Members. Page: 9 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Zoom on scenario 1: hydraulic pre-design model Pre-design model benefices illustration 􀀹 Context: for comparison purpose 2 types of simulations run on Ocasime laws platform: - with hydraulic pre-design model - without hydraulic pre-design model: pre-design model outputs disconnected and replaced by constant “required minimum delta-pressures” 􀀹 Flight control order (theoretical side-stick order) 0 2 4 6 8 10 12 14 16 18 20 t(s) DPPIL Full stick (right) DPPIL Full stick (left) © 2006 VIVACE Consortium Members. Page: 10 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Zoom on scenario 1: hydraulic pre-design model Pre-design model benefices illustration: case 1 􀀹 Conditions: low fluid temperature, all pumps running 􀀹 Simulation results: Aileron performance: comparison between "with…" or "without pre-design model" Aileron flow Aileron available delta-pressure {1} Required flow (with pre-design model) {1} Available delta-pressure with pre-design model {2} Available delta-pressure without pre-design model l/min bar s s required minimum delta-pressure => With pre-design model: more available pressure (in that case) © 2006 VIVACE Consortium Members. Page: 11 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Pre-design model benefices illustration: case 1 (continuation) 􀀹 Simulation results: - Aileron performance: comparison between "with…" or "without pre-design model" (continuation) ⇒ Position more realistic with pre-design model. In this case position reached is closer to the order. ⇒ Maximal position gain observed: around 50% (Definition: position gain = ({1}–{2}) / position order * 100) Zoom on scenario 1: hydraulic pre-design model Position order {1} Position response with pre-design model {2} Position response without pre-design model deg Aileron position Gain 50% s © 2006 VIVACE Consortium Members. Page: 12 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Zoom on scenario 1: hydraulic pre-design model Pre-design model benefices illustration: case 1 (continuation) 􀀹 Simulation results: - Roll speed: comparison between "with…" or "without pre-design model” => Maximal roll speed gain observed: around 16% (at beginning of motion) (Definition: roll speed gain = absolute value [({1}–{2})/{1}] * 100, where {1} is the roll speed with pre-design model and {2} is the roll speed without pre-design model) 􀀹 Conclusion: Case 1 illustrates how pre-design model could be used to reduce: - margins on (over)sizing of actuators or hydraulic system - aircraft weight 20% s Roll speed difference (%) © 2006 VIVACE Consortium Members. Page: 13 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Zoom on scenario 1: hydraulic pre-design model Pre-design model benefices illustration: case 2 􀀹 Conditions: low fluid temperature, 1 pump off among the 2 available, additional high flow requests from flaps motor and from one consumer downstream priority-valve 􀀹 Simulation results: priority-valve functioning: comparison between "with…" or "without pre-design model" => Priority function activated: flow supply interrupted for consumer downstream priority-valve 0 l/min {1} Available flow downstream priority-valve, with pre-design model {2} Available flow downstream priority-valve, without pre-design model s Available flow for consumers downstream priority-valve © 2006 VIVACE Consortium Members. Page: 14 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Zoom on scenario 1: hydraulic pre-design model Pre-design model benefices illustration: case 2 (continuation) 􀀹 Simulation results: priority-valve functioning: comparison between "with…" or "without pre-design model" (continuation) => Priority valve operating is a new simulated functionality. {1} Available delta-pressure downstream priority-valve, with pre-design model {2} Available delta-pressure downstream priority-valve, without pre-design model {1} Priority-valve state with pre-design model {2} Priority-valve state without pre-design model (virtual) priority-valve opened priority-valve closed 0 bar s s required minimum delta-pressure Available pressure for consumer downstream priority-valve Priority-valve status © 2006 VIVACE Consortium Members. Page: 15 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Zoom on scenario 1: hydraulic pre-design model Pre-design model other benefits (not illustrated): 􀀹 Pre-design model also allows to simulate cases where flight control surfaces answers are overestimated: - cases where model underlines insufficient hydraulic power (very low temperature for example) 􀀹 For such cases, as its answers are more realistic, pre-design model could underline tuning necessities (flight control laws, actuators or hydraulic system sizing, …) or flight limitations. © 2006 VIVACE Consortium Members. Page: 16 24-26 October 2006 All rights reserved TITLE OF THE SLIDE VIVACE FORUM 2 Hydraulic task: conclusion 􀀹 Hydraulic task is integrated with Virtual Aircraft contribution. 􀀹 Hydraulic pre-design model is innovative because it helps to improve the integration of hydraulic system in the pre-design phases of aircraft development: - Increased model fidelity - Model available early: method and library of sub-parts available 􀀹 Business benefits: - Actuators, flight control surfaces and hydraulic system sizing mature more early; development time reduced - Over-sizing margins reduction, weight gain 􀀹 The VIVACE contribution is already demonstrated and under exploitation: - Pre-design model benefices illustration (cf. gain on flight control surfaces simulated position or on simulated A/C trajectory) 􀀹 VIVACE hydraulic task way forward: - Scenario 2 “detailed model” will be presented at Forum 3.

zhgq412 发表于 2010-8-2 10:31:46

玩玩！看看！

小虾米不哭 发表于 2010-8-3 10:27:45

好东西啊。顶起来

555zhenjia 发表于 2010-8-12 00:17:47

我喜欢，楼主要是有中文版的就更好了

caucruien 发表于 2010-8-27 13:36:49

好东西啊看看的要

xheleon 发表于 2010-8-28 17:13:23

非常感谢楼主发布！！！！

chendu1987 发表于 2010-9-7 23:20:35

谢谢！！！

y652325 发表于 2010-9-27 11:29:07

非常不错的贴

leoyuxin 发表于 2010-10-11 10:16:54

厉害，谢谢楼主。

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Hydraulic System Simulation 液压系统模拟