Abstract: A lift device includes a chassis, a platform configured to support an operator, the platform including an attachment point configured to engage a lanyard to secure the operator to the platform, a lift assembly coupling the platform to the chassis and configured to raise the platform relative to the chassis, a sensor configured to provide sensor data indicative of engagement between the attachment point and the lanyard, and a controller operatively coupled to the sensor. The controller is configured to determine, based on the sensor data, if the lanyard is engaged with the attachment point. In response to a determination that the lanyard is not engaged with the attachment point, the controller is configured to at least one of (a) activate an alarm to provide a notification to alert the operator that the lanyard is not engaged with the attachment point or (b) limit movement of the lift device.

Abstract: A lift vehicle includes a chassis, an implement, a lift arm coupling the implement to the chassis, a load sensor, a tilt sensor, and a controller. The lift arm includes an actuator configured to selectively extend the lift arm and a length sensor configured to provide data relating to a length of the lift arm. The load sensor can provide data relating to a load at the implement. The tilt sensor can provide data relating to an angular orientation of the chassis relative to a reference plane. The controller can receive data from the length sensor, the load sensor, and the tilt sensor. The controller can determine, based on the data from the load sensor and the tilt sensor, an operating envelope for the lift arm. The operating envelope can include a maximum extension of the lift arm. The controller can selectively limit an operation of the lift arm such that the lift arm operates within the operating envelope.