A uew approach, the sum of weighted acceleration technique(SWAT), is presented to identify dyuamic force applied on the mechanical system from system responses. Effective weights are a series or coefficients to symbol...A uew approach, the sum of weighted acceleration technique(SWAT), is presented to identify dyuamic force applied on the mechanical system from system responses. Effective weights are a series or coefficients to symbolize the relation between responses and excitation data. Its application is extended from free system to constraint system in tke paper. Firstly, the theoretical basis of the method is introduced and recursive least square algorithm to determine the effective weights is given. Then a computer simulation example was carried out on a three degree-of-freedom coustraint system. Random force was identified usiug the method. Finally an experiment was implemented on a steel cantilever.The results or both computer simulation and experimental verification show that it is feasible and effective to identify dynamic force of constraint system by the method.展开更多
After summarizing the current situation of the research on human body modeling, a new dynamic model containing 5 equivalent masses has been proposed and the corresponding dynamic equations has been deduced too. By usi...After summarizing the current situation of the research on human body modeling, a new dynamic model containing 5 equivalent masses has been proposed and the corresponding dynamic equations has been deduced too. By using this new model, more detailed information about the situation of the human body under impact and vibration can be obtained. The new model solves the problem that transmission functions of forces inside the human body can't be deduced by using 3-equivalent-mass model. It will find its usage in many applications.展开更多
文摘A uew approach, the sum of weighted acceleration technique(SWAT), is presented to identify dyuamic force applied on the mechanical system from system responses. Effective weights are a series or coefficients to symbolize the relation between responses and excitation data. Its application is extended from free system to constraint system in tke paper. Firstly, the theoretical basis of the method is introduced and recursive least square algorithm to determine the effective weights is given. Then a computer simulation example was carried out on a three degree-of-freedom coustraint system. Random force was identified usiug the method. Finally an experiment was implemented on a steel cantilever.The results or both computer simulation and experimental verification show that it is feasible and effective to identify dynamic force of constraint system by the method.
文摘After summarizing the current situation of the research on human body modeling, a new dynamic model containing 5 equivalent masses has been proposed and the corresponding dynamic equations has been deduced too. By using this new model, more detailed information about the situation of the human body under impact and vibration can be obtained. The new model solves the problem that transmission functions of forces inside the human body can't be deduced by using 3-equivalent-mass model. It will find its usage in many applications.
