Abstract: One variation of a method includes, during a first time period: detecting a direction of motion of a trailer; detecting a first force applied to a kingpin; detecting an incline angle of the trailer; calculating a first target preload force opposite the direction of motion and inversely proportional to the incline angle; and in response to the first force falling below the first target preload force, triggering a motor to increase torque output opposite the direction of motion. The method further includes, during a second time period: detecting a second force applied to the kingpin; detecting a decline angle of the trailer; calculating a second target preload force opposite the direction of motion and inversely proportional to the decline angle; and in response to the second force falling below the second target preload force, triggering the motor to increase torque output opposite the direction of motion.

Abstract: One variation of a system includes a kingpin including: a head; a base coupled to a proximal end of the trailer; a shank interposed between the head and the base; a first sensor configured to output signals representing lateral forces applied to the kingpin; and a second sensor configured to output signals representing longitudinal forces applied to the kingpin. The system further includes a controller configured to: access a first signal from the first sensor representing a lateral force applied to the kingpin; access a second signal from the second sensor representing a longitudinal force applied to the kingpin; calculate a direction and a magnitude of a force applied to the kingpin based on the first and second signals; and trigger a motor arranged on a distal end of the trailer to output a torque in the direction of the force and proportional to the magnitude of the force.

Abstract: One variation of a method includes, during a first time period: detecting a direction of motion of a trailer; detecting a first force applied to a kingpin; detecting an incline angle of the trailer; calculating a first target preload force opposite the direction of motion and inversely proportional to the incline angle; and in response to the first force falling below the first target preload force, triggering a motor to increase torque output opposite the direction of motion. The method further includes, during a second time period: detecting a second force applied to the kingpin; detecting a decline angle of the trailer; calculating a second target preload force opposite the direction of motion and inversely proportional to the decline angle; and in response to the second force falling below the second target preload force, triggering the motor to increase torque output opposite the direction of motion.

Abstract: One variation of a system for power distribution of a trailer includes: a trailer chassis; a driven axle suspended from the trailer chassis; and a motor coupled to the driven axle. The system further includes a battery assembly coupled to the trailer chassis and configured to supply electrical energy to the motor to drive the driven axle and source electrical energy from the motor to slow motion of the driven axle. The system also includes a charging panel coupled to the trailer chassis and configured to couple to an external charging element. The system further includes a panel actuator configured to advance the charging panel from the trailer chassis to an open position to form a target gap between the external charging element and the charging panel and to retract the charging panel to a closed position to decouple the charging panel from the external charging element.

Abstract: One variation of a system includes a bogie including: a chassis; a first set of latches configured to transiently engage a first subset of engagement features, in a first array of engagement features on a left rail and in a second array of engagement features on a right rail of the trailer, to retain the bogie below a floor of the trailer; a driven axle suspended from the chassis; and a motor coupled to the driven axle and configured to output torque to the driven axle and regeneratively brake the driven axle. The system further includes a battery assembly: including a second set of latches configured to transiently engage a second subset of engagement features, in the first array of engagement features and in the second array of engagement features, to retain the battery assembly adjacent the bogie; and configured to receive electrical energy from the motor.

Abstract: One variation of a system includes a kingpin: arranged on a proximal end of the trailer; includes a sensor configured to output a signal representing lateral forces and longitudinal forces applied to the kingpin; and configured to couple to a tow vehicle. The system further includes an interface including a joystick and a kingpin interface configured to transfer forces, applied to the joystick, into the kingpin. The system also includes a controller configured to: access the signal from the sensor; based on the signal, calculate a magnitude of a force applied to the kingpin; calculate a first target speed of a first wheel of the trailer proportional to the magnitude; calculate a second target speed of a second wheel of the trailer proportional to the magnitude; and serve the first target speed and the second target speed to a drive system arranged on a distal end of the trailer.

Abstract: A multi-node remote pool monitoring system and method is provided. The system includes a master control unit and at least one slave node connected to a piece of pool equipment and serially connected to at least one other slave node in a daisy-chain configuration for transmitting power and data between the nodes. Each node may further be connected to a sensor for monitoring the output of the pool equipment connected to that node. Each relay node has a unique network address by which the master node can address and command or query each slave node to switch a connected relay/load; report the status of the connected load; and report the signal recorded by connected sensors. The data transmitted along the multi-node network and a pool signature may be processed for predicting pool equipment runtime energy demand, one or more operational states of pool equipment and equipment failure.

Abstract: A method and apparatus for removing solids separated from wastewater, or algae from algal solution, using an improved dissolved air flotation system that incorporates a slowly rotating cylindrical sieve at the end of an upward sloping beach to drain free water from the float, which has been pushed up the beach and onto the rotating sieve, and a doctor blade that removes the thickened float from the rotating sieve is disclosed.