修理分队指挥员科学、合理、快速地选择机动路线,对于高效发挥巡回保障力量抢修效益、有效保存战场抢修有生力量具有十分重要的意义。以单目标点抢救抢修任务为研究对象,根据摩步机动路线选择的主要影响因素,构建修理分队路线选择的评...修理分队指挥员科学、合理、快速地选择机动路线,对于高效发挥巡回保障力量抢修效益、有效保存战场抢修有生力量具有十分重要的意义。以单目标点抢救抢修任务为研究对象,根据摩步机动路线选择的主要影响因素,构建修理分队路线选择的评估指标体系。采用组合赋权-逼近理想值法(technique for order preference by similarity to ideal solution,TOPSIS)评估模型,对分队抢修仿真行动过程中指挥员所选择的机动路线进行评估。在仿真条件下,对3位指挥员提出的机动路线进行评估排序,选择最优路线,以验证该方法的可行性和有效性。展开更多
战场抢修是一线部队战时有效保持与快速恢复装备战术状态以确保战斗力的重要手段。不同作战阶段,抢修分队的具体部署位置不仅直接影响自身安全,还直接影响抢修任务的完成时效。通过分析装备抢修分队选址的影响因素,构建了选址决策评估...战场抢修是一线部队战时有效保持与快速恢复装备战术状态以确保战斗力的重要手段。不同作战阶段,抢修分队的具体部署位置不仅直接影响自身安全,还直接影响抢修任务的完成时效。通过分析装备抢修分队选址的影响因素,构建了选址决策评估指标体系;利用序关系分析法(G1法)和CRITIC法(Criteria Importance Through Intercriteria Correlation)的组合赋权法确定指标权重;采用云模型确定各参训人员的选址决策等级,并分析其优劣性。以相同仿真条件下的三组选址方案为例,对各参训人员的选址决策能力进行科学评估。该方法为战时装备抢修阶段性能力评估提供了新思路。展开更多
Electro-hydraulic control systems are nonlinear in nature and their mathematic models have unknown parameters. Existing research of modeling and identification of the electro-hydraulic control system is mainly based o...Electro-hydraulic control systems are nonlinear in nature and their mathematic models have unknown parameters. Existing research of modeling and identification of the electro-hydraulic control system is mainly based on theoretical state space model, and the parameters identification is hard due to its demand on internal states measurement. Moreover, there are also some hard-to-model nonlinearities in theoretical model, which needs to be overcome. Modeling and identification of the electro-hydraulic control system of an excavator arm based on block-oriented nonlinear（BONL） models is investigated. The nonlinear state space model of the system is built first, and field tests are carried out to reveal the nonlinear characteristics of the system. Based on the physic insight into the system, three BONL models are adopted to describe the highly nonlinear system. The Hammerstein model is composed of a two-segment polynomial nonlinearity followed by a linear dynamic subsystem. The Hammerstein-Wiener（H-W） model is represented by the Hammerstein model in cascade with another single polynomial nonlinearity. A novel Pseudo-Hammerstein-Wiener（P-H-W） model is developed by replacing the single polynomial of the H-W model by a non-smooth backlash function. The key term separation principle is applied to simplify the BONL models into linear-in-parameters struc^tres. Then, a modified recursive least square algorithm（MRLSA） with iterative estimation of internal variables is developed to identify the all the parameters simultaneously. The identification results demonstrate that the BONL models with two-segment polynomial nonlinearities are able to capture the system behavior, and the P-H-W model has the best prediction accuracy. Comparison experiments show that the velocity prediction error of the P-H-W model is reduced by 14%, 30% and 75% to the H-W model, Hammerstein model, and extended auto-regressive （ARX） model, respectively. This research is helpful in controller design, system monitoring and diagnosis.展开更多
针对分队级战场抢修(battlefield damage assessment and repair,BDAR)行动仿真训练评估中的指标融合问题,提出基于改进功效系数法的战场抢修行动训练定量指标评估模型。以行动准备阶段的工作计划拟制能力为研究对象,分析相应的定量和...针对分队级战场抢修(battlefield damage assessment and repair,BDAR)行动仿真训练评估中的指标融合问题,提出基于改进功效系数法的战场抢修行动训练定量指标评估模型。以行动准备阶段的工作计划拟制能力为研究对象,分析相应的定量和定性指标参数需求,结合基于D-S证据理论的定性指标评估值确定方法,运用改进后的功效系数法对定量指标评估值进行计算。实例分析结果证明:该评估模型保持了与定性指标评语等级的一致性,为BDAR行动仿真训练评估系统中的指标融合建立了基础,具备有效性和实用性。展开更多
文摘修理分队指挥员科学、合理、快速地选择机动路线,对于高效发挥巡回保障力量抢修效益、有效保存战场抢修有生力量具有十分重要的意义。以单目标点抢救抢修任务为研究对象,根据摩步机动路线选择的主要影响因素,构建修理分队路线选择的评估指标体系。采用组合赋权-逼近理想值法(technique for order preference by similarity to ideal solution,TOPSIS)评估模型,对分队抢修仿真行动过程中指挥员所选择的机动路线进行评估。在仿真条件下,对3位指挥员提出的机动路线进行评估排序,选择最优路线,以验证该方法的可行性和有效性。
文摘战场抢修是一线部队战时有效保持与快速恢复装备战术状态以确保战斗力的重要手段。不同作战阶段,抢修分队的具体部署位置不仅直接影响自身安全,还直接影响抢修任务的完成时效。通过分析装备抢修分队选址的影响因素,构建了选址决策评估指标体系;利用序关系分析法(G1法)和CRITIC法(Criteria Importance Through Intercriteria Correlation)的组合赋权法确定指标权重;采用云模型确定各参训人员的选址决策等级,并分析其优劣性。以相同仿真条件下的三组选址方案为例,对各参训人员的选址决策能力进行科学评估。该方法为战时装备抢修阶段性能力评估提供了新思路。
基金supported by National Natural Science Foundation of China(Grant No.51175511)
文摘Electro-hydraulic control systems are nonlinear in nature and their mathematic models have unknown parameters. Existing research of modeling and identification of the electro-hydraulic control system is mainly based on theoretical state space model, and the parameters identification is hard due to its demand on internal states measurement. Moreover, there are also some hard-to-model nonlinearities in theoretical model, which needs to be overcome. Modeling and identification of the electro-hydraulic control system of an excavator arm based on block-oriented nonlinear（BONL） models is investigated. The nonlinear state space model of the system is built first, and field tests are carried out to reveal the nonlinear characteristics of the system. Based on the physic insight into the system, three BONL models are adopted to describe the highly nonlinear system. The Hammerstein model is composed of a two-segment polynomial nonlinearity followed by a linear dynamic subsystem. The Hammerstein-Wiener（H-W） model is represented by the Hammerstein model in cascade with another single polynomial nonlinearity. A novel Pseudo-Hammerstein-Wiener（P-H-W） model is developed by replacing the single polynomial of the H-W model by a non-smooth backlash function. The key term separation principle is applied to simplify the BONL models into linear-in-parameters struc^tres. Then, a modified recursive least square algorithm（MRLSA） with iterative estimation of internal variables is developed to identify the all the parameters simultaneously. The identification results demonstrate that the BONL models with two-segment polynomial nonlinearities are able to capture the system behavior, and the P-H-W model has the best prediction accuracy. Comparison experiments show that the velocity prediction error of the P-H-W model is reduced by 14%, 30% and 75% to the H-W model, Hammerstein model, and extended auto-regressive （ARX） model, respectively. This research is helpful in controller design, system monitoring and diagnosis.
文摘针对分队级战场抢修(battlefield damage assessment and repair,BDAR)行动仿真训练评估中的指标融合问题,提出基于改进功效系数法的战场抢修行动训练定量指标评估模型。以行动准备阶段的工作计划拟制能力为研究对象,分析相应的定量和定性指标参数需求,结合基于D-S证据理论的定性指标评估值确定方法,运用改进后的功效系数法对定量指标评估值进行计算。实例分析结果证明:该评估模型保持了与定性指标评语等级的一致性,为BDAR行动仿真训练评估系统中的指标融合建立了基础,具备有效性和实用性。
