A dynamic tire friction model based on the LuGre friction model has been developed recently. The model includes the longitudinal and lateral forces, as well as the self aligning torque. It has originally been derived in distibuted form, and then transformed to simpler lumped form with only three internal states. The lumped model has been based on uniform normal pressure distribution. It is exte...

nonlinear lumped-parameter model of a piezoelectric stack A, ctuator has been developed to describe actuator behavior for purposes of control system analysis and design, and, in particular, for microrobotic applications requiring accurate position andor force control. In formulating this model, the authors propose a generalized Maxwell resistive capacitor as a lumped-parameter causal representa...

This paper presents an improved lumped element model for clamped, circular-shape, piezoelectric micromachined ultrasonic transducers (pMUTs). A small signal equivalent circuit is developed to include electrical, mechanical, and acoustic domains, which are analyzed separately combined with the associated couplings. For first time, a two-term mode shape approach adapted reveal intrinsic extrinsic...

The Rainfall-Response Aquifer and Watershed Flow Model (RRAWFLOW) is a lumped-parameter model that simulates streamflow, spring flow, groundwater level, or solute transport for a measurement point in response to a system input of precipitation, recharge, or solute injection. I introduce the first version of RRAWFLOW available for download and public use and describe additional options. The open...

In the quasi-linear model of Lagos and Wright [A unified framework for monetary theory and policy analysis, J. Polit. Econ. 113 (2005) 463—484], money is essential and—if lump-sum taxation is feasible—the Friedman rule implements the first-best allocation. In this paper, I impose the additional restriction of voluntary trade; so that (coercive) lump-sum taxation is infeasible. Despite this adde...