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With the growing energy crisis, energy saving of building has be paid more and more attention. In China, the consumption of air conditioning accounts for forty to sixty percent of the total building. So energy saving of the air conditioning system is a key research. This article describes the variable flow form of building air conditioning, and lists the control technology application of air conditioning,...
This paper focuses on conceptual design automation of energy transforming systems. A Computer Aided Conceptual Design Expert System for Energy transformation (CACDESE) is introduced based on the product gene theory. The conceptual design of a solar engine system demonstrates that the proposed expert system can rapidly find the appropriate combinational principle solution from the knowledge base and...
Computer-Aided Design is used to carry out 3-D (three dimensions) design for diesel engine combustion system. The diesel engine combustion system is designed and each part is modeled in Pro/E. Pro/E is a solid modeler and this offers considerable advantage for solid model creation. Normally, the geometry is first sketched in 2-D and then extruded in the third direction to generate a 3-D model. In...
The parameters of suspension system cannot change according to the road excitation, and the system can only store or exhaust the body vibration energy. The active suspension system can improve both the riding comfort and handing safety in various operation conditions. The least means squares adaptive algorithm is used in active suspension system. For the least means squares adaptive algorithm, the...
For improving Riding Comfort, an adaptive fuzzy PID control method is proposed for the semi-active suspension model of engineering vehicle with five degrees of freedom based on the advantages of fuzzy control and adaptive PID control. Taking a tipper as the study object, an adaptive fuzzy PID controller is designed for vibration control of the engineering vehicle and is simulated. The performance...
In poor driving conditions, the vibration of engineering vehicle greatly increased driver's labor intensity. Taking engineering vehicle as the study object, dynamic model of semi-active suspension system of engineering vehicle with five degrees of freedom is established according to the reasonable simplification of the actual vehicle. Based on the PID control and adaptive fuzzy PID control, the paper...
The dynamical performances of vehicle are regarded as control aims. With the nonlinearity of the road-vehicle system, a fuzzy control algorithm which fuzzy control rule table can be obtained with the numerical calculation is advanced. Because the algorithm can adjust the rectification factor of fuzzy controller, it not only can reflect the advantage of fuzzy logic in nonlinearity system but also can...
Based on the PID control and adaptive fuzzy PID control, the paper establishes semi-active suspension model of engineering vehicle and compares vibration control and suspension performance among the semi-active suspensions, taking engineering vehicle as the study object. Through the further simulation research, from the comparative analysis performance indexes of riding comfort and handling safety,...
Because of complex operating environment and bad road conditions, how to guarantee that engineering vehicles can adapt the operating environment and run reliably, has become the hot spot attention topic of researchers and manufacturers. This paper focuses on the five freedom degrees model of engineering vehicle, and theory and structure of semi-active suspension. Based on the previous control strategies,...
With the user's needs and the development of modern technology, the engineering vehicles develop continuously toward the heavy-load and high-speed direction. The higher riding comfort requirements of engineering vehicles are put forward. The traditional passive suspension had not met the requirements of riding comfort. An adaptive fuzzy PID control method is proposed for the semi-active suspension...
Engine cold start is an important issue in the automobile development. The traditional control strategy of cold start is an open-loop control that results in a high HC emission. In the paper, the improved control strategy for SI engine cold start is discussed. And it indicates that the A/F ratio, ignition time and the desired idle speed are the 3 important parameters for the cold start. In order to...
In order to monitor construction machinery's performance and quality, an intelligent monitoring application system is presented in the paper. The system makes site monitoring cell installed on every construction machinery as its terminal, GPRS (general packet radio service) as its network carriers, intelligent monitoring center as controller. The system can supervise the running status and alarm when...
An advanced suspension system with adjustable fuzzy control algorithm is designed to improve vehicle comfort and road holding capability. It not only can reflect the advantage of fuzzy logic in nonlinearity system but also can improve the disadvantage of common fuzzy control method strongly depending on the experience. In this paper, taking the ride comfort and road handing as system control objective,...
For two degree of freedom of vehicle suspension model, a novel adaptive controller is presented. In order to compare and analyse, acceleration mean square root of vehicle's vibration is adopted as evaluation index for the riding comfort. In addition to considering the handing safety of vehicle, wheel dynamic load and suspension dynamic deflection are also used to contrast research. The simulation...
A new vanadium-glycine complex (NH4V(Gly)3(PO4)2ldrH2O) was synthesized in hydrothermal condition and characterized by XRD, FTIR, SEM and TG-DSC techniques. The results indicate that glycine and water exist in the crystal framework as ligand coordinating with vanadium. The SEM images show that the single crystals are homogeneous in crystal size and shape, and show a good crystalline performance. The...
Taking Chinese organization and employee as objectives, this article examines whether current findings on person-organization fit are also applicable to the culture in which collectivism and confucian value are widely recognized. This article, discusses the construct of P-O fit and relations between employees' perceptions of fit and job involvement, OCB and organizational commitment. Mains findings...
A kind of active suspension system combined with passive suspensions and active components is addressed. Suspension dynamics are modeled using a two degree-of-freedom, linear and time-invariant vehicle model. The least means squares adaptive algorithm that guarantees system optimal control, is presented and used to find the optimal suspension system design. For two-DOF vehicle suspension model, LMS...
Due to the inherent nonlinear nature of vehicle fluid damper, an intelligent control algorithm which fuzzy control rule table can be obtained with the numerical calculation is advanced. The algorithm can adjust the rectification factor of fuzzy controller by adaptive filter method. Suspension dynamics are modeled using a two degree-of-freedom, linear and time-invariant vehicle model. The acceleration...
Measure system is important part for an autonomous mobile robot. Move-in-mud robot is a new kind of autonomous underwater robot, which is used to dig hole in the mud. Measure system of move-in-mud robot is designed in the paper and measure principle of move-in-mud robot is analysed. Data fusion methods combine multi-sensor information to obtain the uniform description or the understanding to the measured...
Adaptive algorithm is widely applied in the filed of digital signal processing. LMS adaptive algorithm is applied in the location system of an autonomous robot to increase the accuracy of the location system according to the analysis of the adaptive filter. The autonomous robot is used to dig the hole in the mud underwater along the prearranged trajectory in wreck salvage. The working condition of...
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