In order to solve the linear variable differential transformer （LVDT） displacement sensor nonlinearity of overall range and extend its working range, a novel line-element based adaptively seg- menting method for pie...In order to solve the linear variable differential transformer （LVDT） displacement sensor nonlinearity of overall range and extend its working range, a novel line-element based adaptively seg- menting method for piecewise compensating correction was proposed. According to the mechanical structure of LVDT, the output equation was calculated, and then the theoretic nonlinear source of output was analyzed. By the proposed line-element adaptive segmentation method, the nonlinear output of LVDT was divided into linear and nonlinear regions with a given threshold. Then the com- pensating correction function was designed for nonlinear parts employing polynomial regression tech- nique. The simulation of LVDT validates the feasibility of proposed scheme, and the results of cali- bration and testing experiments fully prove that the proposed method has higher accuracy than the state-of-art correction algorithms.展开更多
High contact ratio (HCR) gear is a kind of high-strength and low-noise mechanical drive component. In the gear drive, there are more couples of teeth taking part in meshing, which reduces the load born by each couple ...High contact ratio (HCR) gear is a kind of high-strength and low-noise mechanical drive component. In the gear drive, there are more couples of teeth taking part in meshing, which reduces the load born by each couple of teeth and cuts down the varying range of meshing rigidity and the big flexibility drops the dynamic load in the drive, so its load-beating capacity is increased greatly. The thesis analyzed the rigidity, i. e. the relationship between the loads展开更多
基金Supported by National High Technology Research and Development Program of China("863" Program)(2011AA041002)
文摘In order to solve the linear variable differential transformer （LVDT） displacement sensor nonlinearity of overall range and extend its working range, a novel line-element based adaptively seg- menting method for piecewise compensating correction was proposed. According to the mechanical structure of LVDT, the output equation was calculated, and then the theoretic nonlinear source of output was analyzed. By the proposed line-element adaptive segmentation method, the nonlinear output of LVDT was divided into linear and nonlinear regions with a given threshold. Then the com- pensating correction function was designed for nonlinear parts employing polynomial regression tech- nique. The simulation of LVDT validates the feasibility of proposed scheme, and the results of cali- bration and testing experiments fully prove that the proposed method has higher accuracy than the state-of-art correction algorithms.
文摘High contact ratio (HCR) gear is a kind of high-strength and low-noise mechanical drive component. In the gear drive, there are more couples of teeth taking part in meshing, which reduces the load born by each couple of teeth and cuts down the varying range of meshing rigidity and the big flexibility drops the dynamic load in the drive, so its load-beating capacity is increased greatly. The thesis analyzed the rigidity, i. e. the relationship between the loads
